Electronic Directory of Service (eDOS) Implementation Guide
Ask at order Entry (AOE) Questions
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This draft document describes how Ask at Order Entry (AOE) questions will be documented in
Release 2 of the HL7 Version 2 Implementation Guide: Laboratory Test Compendium
Framework. The field note (OM1-31) will be updated and Appendix A added as described
below. The LOINC encoded AOE examples in Appendix Aare provided as guidance and focus
on commonly used Ask at Order Entry questions. Thanks to the LOI Vocabulary Work Group for
prior research on common LOINC coded questions; their work is included in Appendix A.
Additional thanks to Cindy Johns and Riki Merrick for adding additional AOE examples.
Version history of updates to this document is described below:
Version 1
Reviewed February 26 eDOS Work Group Call
Version 2
Contains edits from February 26 eDOS WG
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Version 3
Also collect examples without LOINC codes
Explain LOINC Trial codes and suggest to check as codes can change in newer
versions of LOINC
Contains additional edits submitted:
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Additional AOE examples added by Cindy Johns, Riki Merrick, Virginia Sturmfels
and Freida Hall.
Revised Y/N AOEs to CNE (Coded with No Exceptions) data type and referenced
Table 0136 (per HL7 determination by Tony Julian, Infrastructure and Messaging CoChair)
Verified “LOINC LongName” used in example AOEs
Added hyperlink to LOINC code
Resorted in LOINC code order
Deleted old instructions, added new instructions for Peer Review
Version 4
Reviewed LOI Vocabulary Work Group March 12, 2013 call
Version 4apost Vocab
call
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V5
Edits (to Version 3) by Cindy Johns and Riki Merrick
Denote Trial codes by * in the LOINC code column, and add explanation of * prior to
table presentation.
Remove answers, add text in intro to refer users back to LOINC website
Add additional text prior to table to explain recommended use of UCUM codes;
remove from Usage Notes
Added column for “Alias” names; these represent common names which may be more
familiar to implementers than the LOINC LongName. Accept edits to LOINC
LongName.
Explain hyperlinks, move from footnote to intro prior to table.
For Peer Review
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All revision marks to date accepted
Highlights in LOINC table removed
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V6
Edits from Peer Review comments
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V7
Additional AOEs added
Corrections from Cindy Johns
Edits from March 19 Vocabulary call
Remove Peer Review Instructions (deadline was March 19, 2013)
Delete CQ, add NM or SN and Usage Note re: OBX-6 (discussed March 19 Vocab call)
Move OM1-31 note info per suggestion Bob Yencha (eDOS editor)
Additional edits from Peer Review comments
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V8
2013-03-19 post Vocab call updates from Cindy Johns
2013-03-19 comments Pam Banning
2013-03-24 comments on V6 from Riki Merrick
Edits from March 26 Vocabulary Call
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Moved items that should be messaged in SPM-Specimen segment to separate
table
Moved items that might be sent in other HL7 field to separate table, and added
supporting information from OO minutes and LOI Ballot reconciliation; this will
be deleted in next version.
Moved items suggested for deletion or sent as previous result to separate table
Other edits
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V9
Edits from April 2 Vocabulary Call
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V10
Moved five items needing additional information to separate table
Added open issue, discussed on Lab Pilots call, at end of Appendix
Noted LOI cited reference pending revision by LOI WG team
Add “Be sure to populate the units in OBX-6” Usage Note to all NM, SN
Add missing hyperlinks to LOINC code (column 1 in tables)
Miscellaneous edits to introductory text
Resort tables by “LOINC LongName”
Delete 48767-8 Annotation comment Narrative
Edits from April 9 Vocabulary Call
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Change phrase to add “suggested”: Refer to LOINC for suggested answer list
Add open issue: Encoding of answers for LOINC suggested answer lists
Change CWE flavor data type to CWE, unless otherwise specified in the Lab
Order Interface (LOI) Implementation Guide (IG)
Update usage note for Fasting Status AOE based on outcome of LOI discussion:
Y/N ( HL7 Table 0136) If extending HL7 Table 0136, additional values may be
found in HL70912 (pre-adopted from V2.7.1)
Revise usage note for AOEs using Y/N answer where extensions are allowed to
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explain CWE vs. CNE data type, for example, for Diabetic Status: Y/N (HL7
Table 0136), added: This guide recommends CWE in case additional diabetic
statuses are indicated, for example, “Suspected”.
Revise usage note for Gender to add: Answer list may be extended by
agreement of trading partners to support other clinical genders
Revise suggested data type for Antibiotic administered Medication to ST or
CWE
Revise Usage Note for Antibiotic administered Medication to add: If using
CWE RxNorm or other code system may be used.
Miscellaneous edits to AOEs without LOINC codes to prepare for submission to
Regenstrief to obtain LOINC codes.
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Electronic Directory of Service (eDOS) Implementation Guide
Ask at order Entry (AOE) Questions
Appendix A – Ask at Order Entry (AOE) Question Examples
The initial text below is excerpted from HL7 Version 2.5.1 Implementation Guide: S&I
Framework Laboratory Orders from EHR, Release 1 – US Realm, Section 2.6.5 Ask at Order
Entry (AOE) Observations, to explain how Ask at Order Entry questions are “answered” in a
laboratory order.
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[Begin excerpt]
Ask at Order Entry (AOE) responses are recorded as observations that provide critical
information for the calculation or interpretation of some lab results or to satisfy state and federal
health agency mandated information gathering requirements, e.g., for blood lead testing. Not
every order will have the need for AOE questions and associated observations.
Examples of the type of information gathered from a patient include employment information,
pregnancy status, the date of the last menstrual period, mother’s age, and questions about family
and personal history.
AOE responses can take several formats, including but not limited to:
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Yes/No (and coded) to answer questions like “Is this your first pregnancy?”
A code drawn from a value set to provide a coded response to, e.g., “What ethnicity do
you consider yourself to be?”
A number with units for the mother’s age
A date format for the patient’s last menstrual period.
In some cases there may be AOEs that request the outcome of previous results phrased as a
question, for example “Was your previous pap abnormal?”
Should the need arise to send the actual previous result the “previous result group” in the message
structure should be used.
The lab will indicate if and which AOEs to include with the order in their test compendium,
either using paper or electronically via the “Implementation Guide: ACLA Test Compendium
Framework (eDOS), Release 1, January 11, 2011”. In eDOS, there is a repeating field, OM1-31
(Observations Required to Interpret this Observation), that lists all observations that must be
captured at the time the order is created. Each instance in the OM1-31 (Observations Required to
Interpret this Observation) represents a single AOE question.
The eDOS also indicates how the OM1-31 (Observations Required to Interpret this Observation)
shall be conveyed in the order message – currently as AOE responses in OBX segments or, in the
future, other appropriate HL7 message fields elsewhere in the message. The decision regarding
where to message AOE information is outside the scope of the LOI guide.
LOINC shall be used as the standard coding system for AOE questions when an OBX segment is
used and if an appropriate LOINC code exists. The LOINC and local code describing the
question will be placed in OBX-3 (Observation Identifier). Appropriate status is defined in the
LOINC Manual Section 11.2 Classification of LOINC Term Status. If a local coding system is in
use, both the LOINC and the local code should also be sent to help with identification of coding
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issues. When no valid LOINC exists, the local code may be the only code sent.
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[End excerpt]
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Example AOE for Employer Address:
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The example below illustrates how an AOE messaged in OM1-31 Observations Required to
Interpret This Observation is “answered” in a laboratory order:
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AOE Question in eDOS (electronic Directory of Service) message
63758-7^What was the location of this company^LN ^345^Employer Address^99lab|
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AOE Answer in LOI IG (Laboratory Orders Interface Implementation Guide)
message
OBX|1|XAD|63758-7^What was the location of this company^LN^345^Employer
Address^99lab||1000 Hospital Lane^Suite 123^Ann Arbor
^MI^99999^USA^B^^WA|||||||||201210310800|
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In the eDOS Implementation Guide, ask at order entry questions are associated with an orderable
test using OM1-31 (Observations Required to Interpret this Observation). OM1-31 lists all
observations that must be captured at the time the order is created. Multiple AOE questions are
allowed for an individual orderable test; each instance in the OM1-31 represents a single AOE
question.
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Because Meaningful Use has supported “Structured Data” for lab results, beginning with
Meaningful Use Stage 1, the AOE examples below suggest HL7 data types to be used when the
EHR system returns the “answer” to the lab’s compendium test question. For example, the XAD
(Extended Address), data type is suggested when reporting the employer address “answer” for
blood lead test question about employer address.
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The LOINC encoded AOE examples in the table below are provided as guidance and focus on
the most commonly used Ask at Order Entry questions. This is not an exhaustive list and does
not attempt to include all possible AOEs. Implementers can incorporate additional AOEs as
needed for their specific environment.
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LOINC codes may change in newer versions of the data base so it is suggested you verify that
the LOINC codes are valid before using. Some LOINC codes in the list below were “Trial”
codes at the time of publication and are designated with an ‘*’ following the LOINC code. As
defined on the LOINC website “Trial terms are experimental in nature. Use with caution as they
may change.”
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Answer lists may be defined by LOINC and are not included in this IG. Refer to the LOINC
website for more detail at: http://search.loinc.org/
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A direct hyperlink to each LOINC code is provided in the table below. You will need to
“Accept” the Copyright Notice and License to enable the hyperlinks. Additional information,
including related names, is available on the LOINC website.
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For numeric data types (e.g. age) Unified Code for Units of Measure (UCUM) is recommended
but not required. If used, be sure to populate OBX-6 Units (e.g. years, months, days). Further
information on UCUM can be found at http://unitsofmeasure.org/
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The data types below are suggested but not required; other data types may be used where
applicable. LOINC codes may dictate additional structure for the AOE, please refer to LOINC
for additional information.
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Additionally, some AOEs are included which can be messaged elsewhere in the HL7 message, as
indicated in the Usage Notes. We encourage implementers to use the HL7 defined message
structure to communicate AOE information where possible.
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TABLE X-X1. EXAMPLE LOINC AOE QUESTIONS
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SuggestedHL7
Data
Type OBX
response
Usage Note
ST
LOINC
Code1
49089-6
LOINC LongName
[Identifier] Sonographer
63746-2
About how long have you worked for your
employer in your occupation
NM
Be sure to populate the units in OBX-6
30525-0
Age
NM
Be sure to populate the units in OBX-6
63888-2 * Age at first menstrual period
NM
Be sure to populate the units in OBX-6
42797-1
NM
Be sure to populate the units in OBX-6
63890-8 * Age at last menstrual period
NM
Be sure to populate the units in OBX-6
35659-2
NM
Be sure to populate the units in OBX-6
ST or
CWE
If using CWE RxNorm2 or other code system
may be used
NM
Be sure to populate the units in OBX-6
Alias Name
Sonographer ID
Age at first pregnancy
Age at specimen collection
71471-7 * Antibiotic administered Medication
8302-2
Body Height (Methodless)
3137-7
Body height Measured
NM
Be sure to populate the units in OBX-6
3138-5
Body height Stated
NM
Be sure to populate the units in OBX-6
Methodless
29463-7
Body weight
NM
Be sure to populate the units in OBX-6
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Patient Height (inches)
An * in this column indicates the code was “trial” at time of publication.
http://www.nlm.nih.gov/research/umls/rxnorm/index.html
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3141-9
Body weight (measured)
Patient weight (measured)
NM
Be sure to populate the units in OBX-6
3142-7
Body weight (stated)
Patient weight (stated)
NM
Be sure to populate the units in OBX-6
For Kt/v – Dialysis
8344-4
Body weight Measured --post dialysis
Body weight^post dialysis
NM
Be sure to populate the units in OBX-6
For Kt/v – Dialysis
8347-7
Body weight Measured --pre dialysis
Body weight^pre dialysis
69461-2 * Body weight mother -- at delivery
NM
Be sure to populate the units in OBX-6
NM
Be sure to populate the units in OBX-6
55752-0
Clinical information
Previous cytology
ST
11294-6
Current employment Narrative - reported
Current employment
ST
64234-8
Current smoker
CWE
29742-4
Date last dose
DT
8665-2
Date last menstrual period
DT
60431-4
Date of previous biopsy
DT
60432-2
Date of previous PAP smear
DT
11778-8
Delivery date Estimated
Estimated due date
DT
33248-6
Diabetes status
CWE
8462-4
Diastolic blood pressure
CWE
53948-6
Donated egg [Presence]
Donor egg
CNE
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Refer to LOINC for suggested answer list
Y/N (HL7 Table 0136)
This guide recommends CWE in case
additional diabetic statuses are indicated, for
example, “Suspected”.
Y/N ( HL7 Table 0136)
Electronic Directory of Service (eDOS) Implementation Guide
Ask at order Entry (AOE) Questions
The PID-22 Ethnic Group value is provided
for demographic, not clinical use. An AOE
must be provided for those tests where
Ethnic Group drives the interpretation of
results. The value must be determined by
the Ordering Provider and must be sent as
an AOE OBX
42784-9
Ethnic background Stated
69490-1
Ethnicity OMB 1997
Ethnicity
CE
More specific ethnicity values are available,
but not limited to, those found in the
CDCREC document if needed for AOE.
(http://www.cdc.gov/nchs/data/dvs/Race_Eth
nicity_CodeSet.pdf)
CWE
Refer to LOINC for suggested answer list
Y/N ( HL7 Table 0136)
If extending HL7 Table 0136, additional
values may be found in
HL70912 (pre-adopted from V2.7.1)
49541-6
Fasting status [Presence] - reported
Fasting status
CWE
11951-1
Fetal [Identifier] Identifier
Fetus ID
ST
11957-8
Fetal Crown Rump length US
Fetal Crown Rump length
NM
42479-6
Fetal Narrative Study observation general,
multiple fetuses US
12146-7
Fetal Nuchal fold thickness US
63741-3
US is Ultrasound
Be sure to populate the units in OBX-6
ST
NM
US is Ultrasound
Be sure to populate the units in OBX-6
For whom did you work at your main job or
business
XON
Employer Name – Organization example.
For whom did you work at your main job or
63741-3 * business
XPN
Employer Name - Person Example
Nuchal translucency
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46098-0
Gender
IS
Refer to LOINC for suggested answer list
Answer list may be extended by agreement
of trading partners to support other clinical
genders
11884-4
Gestational age Estimated
NM or SN
Be sure to populate the units in OBX-6
49052-4
Gestational age in days
Gestational age (days)
NM
Be sure to populate the units in OBX-6
49051-6
Gestational age in weeks
Gestational age (weeks)
NM
Be sure to populate the units in OBX-6
21299-3
Gestational age method
Gestational age calculation method
8867-4
Heart rate
NM or SN
Be sure to populate the units in OBX-6
58957-2
Heparin given [Type]
53827-2
History of neural tube defect Qualitative
History of ONTD
CNE
Y/N (HL7 Table 0136)
67803-7
History of Procedures - Reported
Previous treatment
ST
11368-8
Illness or injury onset date and time
DT
Y/N (HL7 Table 0136)
This guide recommends CWE in case
additional Insulin dependent diabetes
mellitus [Presence] codes are indicated, for
example “Unknown”
44877-9
Insulin dependent diabetes mellitus
[Presence]
53796-9
Interferon drug given [Identifier]
ST
3145-0
Last menstrual period start
DT
29305-0
Medication prescribed
CWE
54125-0
Name
Partner Name
XPN
11878-6
Number of Fetuses by US
Number of Fetuses
NM
US is Ultrasound
Be sure to populate the units in OBX-6
67471-3 * Pregnancy
ST
Refer to LOINC for suggested answer list
11449-6
CWE
Insulin dependent DM
Pregnancy status – Reported
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CWE
Electronic Directory of Service (eDOS) Implementation Guide
Ask at order Entry (AOE) Questions
18771-6
Provider signing name
Reading physician ID
ST
The PID-10 Race value is provided for
demographic, not clinical use. An AOE must
be provided for those tests where Race
drives the interpretation of results. The value
must be determined by the Ordering
Provider and must be sent as an AOE OBX
32624-9
Race
CWE
49088-8
Sonographer name
XPN
8480-6
Systolic blood pressure
CWE
72166-2
Tobacco Smoking Status
CWE
34970-4
Ultrasound Date
DT
What was the location of this company
63758-7 * [Address]
XAD
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More specific race values are available, but
not limited to, those found in the CDCREC
document if needed for AOE.
(http://www.cdc.gov/nchs/data/dvs/Race_Eth
nicity_CodeSet.pdf)
Refer to LOINC for suggested answer list
Employer Address
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AOES WITHOUT A LOINC CODE
Table X-X. Example AOE Questions (without LOINC code)3
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AOE Question
Animal Exposed to Rabies
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SuggestedHL7
Data
Type OBX
response
Usage Note
This is related to rabies testing
Y/N (HL7 Table 0136)
This guide recommends CWE in case additional codes are
CWE
indicated, for example “Unknown”
LOINC codes may be assigned in the future.
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This is related to rabies testing – use SNOMED organism
hierarchy (PHINVADS animal_CDC value set might work, or
create a rabies specific set)
(From Riki) see below Eric's question in return - it seems
we won't need to have a separate value set for rabies just use the same value set identified in ELR R2, that is
already in PHIN VADS.
Also I did find an animal rabies specific value set:
PHVS_AnimalSpecies_AnimalRabies
2.16.840.1.114222.4.11.3068 in PHIN VADS
I don't have any idea, who is filling these answers out - I
think it is probably a mix - if the sample is from an animal,
then I would think it should be the vet?
Rabies in saliva of bats for 24 days, although unknown for
all species this is longest I found.
There is a value set of PHIN questions in PHIN VADS,
though I do not see the ones we have in our list
PHVS_PHINQuestions_AnimalRabies
2.16.840.1.114222.4.11.3050
Animal species
CWE
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(From Eric)
I had some questions about this. First who is the target
audience for these questions? Will providers fill these
out through an HER or is it Animal control officers and
veterinarians who typically won’t have EHR access? ( This
is a question I need to pose to the Richmond
lab) Also Why the need for a species value set we
already have the phinvads VS in ELR?
Electronic Directory of Service (eDOS) Implementation Guide
Ask at order Entry (AOE) Questions
“Accession Number” or “Case Number” Some reference labs
ask for Accession Number or Case Number, to track back for the
client into their own accession or case number {this may be out
of scope}
Accession Number
CX
The secondary reference lab places this in OBX fields in order to send
the information back to the requestor, to link results back into their
system
Case Number
CX
Patient and Event specific
Biparietal Diameter
NM
Be sure to populate the units in OBX-6
Blood lead purpose
CWE
Suggested Answer List:
Initial
Repeat
Follow-up
Blood lead source
CWE
Date of animal’s death
DT
This is related to rabies testing
Duration
NM
Treatment time for dialysis
Be sure to populate the units in OBX-6
Egg Provider's Race
CWE
If the egg was frozen or not from the patient, what was the age of
the egg at the time of egg retrieval?
NM
Insulin Dependent Diabetic Egg Provider
Is this your first pregnancy (Y/N)
Partner Ethnicity
Viral load
More specific race values are available, but not limited to,
those found in the CDCREC document if needed for AOE.
(http://www.cdc.gov/nchs/data/dvs/Race_Ethnicity_CodeSet.p
df)
Be sure to populate the units in OBX-6
Answers Yes/No?, if so make CNE and HL70136
CNE
(Y/N) HL7 Table 0136
CWE
More specific ethnicity values are available, but not limited to,
those found in the CDCREC document if needed for AOE.
(http://www.cdc.gov/nchs/data/dvs/Race_Ethnicity_CodeSet.p
df)
NM
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Be sure to populate the units in OBX-6
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SPECIMEN LIST
This AOE information is provided to indicate how to map former AOEs to the SPM segment. This IG recommends using the SPM
segment instead of AOEs for the following items. If you are implementing the HL7 Version 2.5.1 Implementation Guide: S&I
Framework Laboratory Orders from EHR, Release 1 – US Realm (LOI) or HL7 Version 2.5.1 Implementation Guide: S&I Framework
Laboratory Results Interface (LRI), Release 1, published July for Meaningful Use in the US Realm, the SPM segment is required in
the Lab Order and Lab Result messages.
TABLE X-X2. EXAMPLE SPECIMEN LOINC AOE QUESTIONS
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LOINC
Code
LOINC LongName
14725-6
[Type] of Body fluid
SuggestedHL7
Data
Type OBX
response
Usage Note
Refer to LOINC for answer list
CNE?
SPM-4 Specimen Type (CWE_CRE)
Alias Name
Collection duration of Stool
Can be calculated from:
SPM-4 Specimen Type (CWE_CRE)
SPM-17 Specimen Collection Date/Time
(DR_1)
If using NM or SN be sure to populate the
units in OBX-6
Collection duration of Urine
NM or SN
Can be calculated from:
SPM-4 Specimen Type (CWE_CRE)
SPM-17 Specimen Collection Date/Time
(DR_1)
If using NM or SN be sure to populate the
units in OBX-6
TS_2
YYYYMMDD
SPM-17 Specimen Collection Date/Time
(DR_1) .1 (Range Start Date/Time)
NM or SN
13363-7
13362-9
49049-0
Collection time of Unspecified specimen
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19763-2
Specimen drawn [Date and time] of Serum or
Plasma
Specimen source [Identifier] in Cervical or
vaginal smear or scraping by Cyto stain
Gynecological source
31208-2
Specimen source [Identifier] of Unspecified
specimen
13620-0
Volume of 12 hour Urine
3167-4
Volume of 24 hour Urine
19151-0
Specimen Volume
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DTM
SPM-17 Specimen Collection Date/Time
(DR_1) .1 (Range Start Date/Time)
ST
SPM-8 Specimen Source Site (CWE_CRE)
CWE
SPM-4 Specimen Type (CWE_CRE)
Can be calculated from:
SPM-4 Specimen Type (CWE_CRE)
SPM-17 Specimen Collection Date/Time
(DR_1)
Be sure to populate the units in OBX-6
24 hour urine, etc.
NM
SPM-12 Specimen Collection Amount
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OTHER AOES LIST
Some AOEs are included in this Implementation Guide which can be messaged elsewhere in the HL7 message, as indicated in the
Usage Notes. We encourage implementers to use the HL7 defined message structure where possible.
Should we not a comment to
PID 07 like we had in LRI that
age at time of collection should
be transmitted as an OBX sub
SPM for specimens collected at
time of order?
Not persuasive
with mod
21-Feb-2013 - Discussion on
whether AOE OBXs should be
under PID, ORC/OBR, and SPM, or
always under ORC/OBR is being
discussed in OO in general.
Current DoB/Age is always on PID,
while other ages would AOE. Race
and Ethnicity can vary, so the
expression of the patient may be
different than what is clinically
required to interpret the test. They
will therefore be AOEs. Gender is
always on PID.
Motion to clarify that AOE is
always sent at ORC/OBR level,
while other information gathered
during ordering and specimen
collection is communicated on
either PID, ORC/OBR, or SPM,
whatever is appropriate. Riki
Merrick, Ken McCaslin
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Ask at Order Entry as OBX
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Should we send AOE ONLY in OBX – some answers would already be available in other fields in the message like PID-10 –
was discussed with Ted Klein and in order to communicate where else would be pretty difficult, so more simple to always use
OBX, even if it will create duplication
ORC/OBR pair uses OBXes to convey this, although OBX under PID or SPM could be considered as well. Either one of
these methods would make it clear they go with the order and are not an actual result.
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Electronic Directory of Service (eDOS) Implementation Guide
Ask at order Entry (AOE) Questions





Need to define how to echo the AOE back that were used for the test interpretation in the result how those would be
differentiated from the results – create a flagging (use existing field with specific value, or add a new field) in the OBX or a
separate grouping
In ELR we created a separate OBR heading for these – other guides suggest to use them under the SPM or the PID (answer
applies to all orders)
Most consistent do send them under the ORC/OBR that they were ordered under.
For distribution across PID, ORC/OBR, SPM, then a flagging in OBX may be the best approach –
Hans will write this up and folks to think about this more
88
SuggestedHL7
Data
Type OBX
response
Usage Note
^Patient
LOINC
Code4
LOINC LongName
56799-0
Address
XAD
PID-11 Patient Address
21112-8
Birth date
DT
Patient Date/Time of Birth in PID-7
OBR-49 Result Handling where HL70507
Alias Name
Observation Result Handling table
Code = N (Notify provider when ready)
Call or Fax Results Back
29308-4
Diagnosis
CWE_CR
56794-1
Internal identifier
CX_GU?
DG1-3 Diagnosis Code
PID-3 Patient Identifier List where HL70203
Identifier type table code = PI (Patient
internal identifier)
22020-2
Maiden name
XPN
Patient Maiden Name can be sent in PID-5
Mother’s Maiden Name in PID-6
21484-1
Mother's race
CE
NK1-35 Race, if NK1-3 Relationship=MTH
(Mother)
CX_NG?
4
An * in this column indicates the code was “trial” at time of publication.
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Electronic Directory of Service (eDOS) Implementation Guide
Ask at order Entry (AOE) Questions
LOINC Term Definition: The NPI (National
Provider Identifier) code for another
physician involved in the care of the patient.
The NPI equivalent of Physician 3 [2490]
PRT – Participation Information Segment
44951-2
Physician NPI [Identifier]
XCN_NG or
XCN_GU
44833-2
Preliminary diagnosis
CWE_CR
DG1-3 Diagnosis Code
PV1-8 Referring Physician
46608-6
Primary referring physician ID Provider
XCN.1 ID Number
CX_NG
Repeating element, none labeled “primary”
PRT-5 Participation Person
45396-9
Social security number
CX_GU
PID-3 Patient Identifier List where identifier
type = SS
46499-0
State of residence
XAD.4 State or
Province
PID-11 Patient Address
XTN
Patient phone per LOINC definition
PID-13 Phone Number - Home (XTN)
PID-14 Phone Number - Business (XTN)
Refer to LOINC for suggested answer list
42077-8
Telephone
45401-7
ZIP code
52831-5
ZIP code Facility
XAD.5 Zip or Postal
PID-11 Patient Address
Code
XAD.5 Zip or Postal LOINC definition “…zip code of the facility
where service was provided or originated…”
Code
89
90
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Electronic Directory of Service (eDOS) Implementation Guide
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91
92
SUGGESTED DELETIONS OR PREVIOUS RESULTS - VOCABULARY WG TO REVIEW
42803-7
Bacteria identified in Isolate
?
906-8
Blood group antigens present [Identifier] in
Blood
?
39156-5
Body mass index (BMI) [Ratio]
NM or SN
Be sure to populate the units in OBX-6
43396-1
Cholesterol non HDL [Mass/volume] in
Serum or Plasma
NM or SN
Be sure to populate the units in OBX-6
48000-4
Chromosome number in Blood or Tissue by
Molecular genetics method
?
42804-5
Fungus identified in Isolate
?
4544-3
Hematocrit [Volume Fraction] of Blood by
Automated count
8670-2
History of family member diseases
49053-2
History of neural tube defect Narrative
History of Cystic Fibrosis
CWE
Refer to LOINC for suggested answer list
TX
Leukemia markers [interpretation] in Blood
49493-0 Narrative
TX
41852-5
Microorganism or agent identified in
Unspecified specimen
?
Specimen segment?
42187-5
Number of specimens tested of Unspecified
specimen
NM
Be sure to populate the units in OBX-6
48557-3 Origin of Stone
?
Page 21 of 22
Electronic Directory of Service (eDOS) Implementation Guide
Ask at order Entry (AOE) Questions
Refer to LOINC for suggested answer list
LA4621-4 Managing physician unknown or
ID number not assigned
OBR-28 Results copies to
93
22028-5 Physician [Identifier]
PRT-5 Participation Person
8251-1
Service comment terms (Service comment,
Service comment 02, Service comment 03,
etc.) were requested by a lab to use as an
OBX lab result message for user-defined
text results.
Service comment
TX?
ADDITIONAL INFORMATION NEEDED
32760-1
Cell type in Unspecified specimen
?
42186-7
Number of specimens received of Unspecified specimen
NM
Be sure to populate the units in OBX-6
35090-0
Patient history
9844-2
Unspecified body region Circumference
NM
Be sure to populate the units in OBX-6
9845-9
Unspecified body region Circumference Percentile
NM
Be sure to populate the units in OBX-6
34648-6
Weight of unspecified time Stool
NM or SN
Be sure to populate the units in OBX-6
Specimen weight
94
95
96
97
OPEN ISSUE
 How will this list be maintained in the future?
 Encoding of answers for LOINC suggested answer lists; pending response from Regenstrief
98
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