CPT Modifiers:
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21 Prolonged E&M Services Add to E&M code number
22 Unusual Procedural Services Service greater than that usually required for the procedure
23 Unusual anesthesia Procedure that usually requires no anesthesia or local anesthesia must be done under
general anesthesia.
24 Unrelated E&M Service by Same Physician During a Postoperative Period E&M service performed during a
postoperative period for a reason unrelated to the original procedure
25 Significant, Separately identifiable E&M Service by the Same Physician on the Same Day of the Procedure
or Other Service E&M services required above and beyond the other service provided or beyond the usual pre and
postoperative care associated with the procedure performed. Different diagnoses not required.
26 Professional Component When physician component reported separately from technical component
27 Multiple Outpatient Hospital E/M Encounters on the same Date Separate and distinct E/M encounters
performed in multiple outpatient hospital settings on the same date
32 Mandated Services Services related to mandated consultation or related services
47 Anesthesia by Surgeon Regional or general anesthesia provided by the surgeon (does not include local
anesthesia)
50 Bilateral Procedure Bilateral procedures performed at the same operative session
51 Multiple Procedures Multiple procedures, other than E&M*, performed at the same session by the same provider.
Report the primary procedure as listed and add -51 to the additional code(s).
52 Reduced Services Procedure partially reduced or eliminated at the physician's discretion
53 Discontinued Procedure Physician elects to terminate procedure that was started but discontinued. Not used for
elective cancellation of a procedure prior to patient's anesthesia induction and/or surgical preparation in the operating
suite.
54 Surgical Care Only One physician performs surgical procedure and another the pre and/or postoperative care.
Add -54 to the surgical procedure code.
55 Postoperative Management Only Postoperative component identified by adding -55 to surgical procedure code.
56 Preoperative Management Only Preoperative component identified by adding -56 to surgical procedure code.
57 Decision for Surgery An E&M service that resulted in decision to perform surgery.
58 Staged or Related Procedure or Service by the Same Physician During the Postoperative Period Physician
should indicate that procedure was 1) planned prospectively (staged); b) more extensive than original procedure; or 3)
for therapy following a surgical procedure. Not used to report treatment of problem requiring return to operating room.
59 Distinct Procedural Service Service is distinct or independent from other services performed on same day.
Identifies procedures not normally reported together.
62 Two Surgeons When two surgeons work together as co-surgeons performing distinct parts of a single reportable
procedure, each adds -62 to the surgery code, and any associated add-on code(s) for that procedure as long as both
surgeons continue to work together as primary surgeons.
66 Surgical Team Highly complex procedures may require concomitant services of several physicians. Each
physician adds -66 to surgery code.
76 Repeat Procedure by Same Physician Procedure or service repeated subsequent to the original.
77 Repeat Procedure by Another Physician Basic procedure done by another physician had to be repeated.
78 Return to the Operating Room for a Related Procedure During the Postoperative Period Another procedure
was performed during the postoperative period of the original procedure that was related to the first.
79 Unrelated Procedure or Service by the Same Physician During the Postoperative Period Performance of
procedure during postoperative period was unrelated to the original procedure.
80 Assistant Surgeon Use -80 modifier to identify surgical assistant services.
81 Minimum Assistant Surgeon Use -81 modifier to identify minimal surgical assistant services.
82 Assistant Surgeon (when qualified resident surgeon not available) Unavailability of qualified resident surgeon
is a prerequisite for use of modifier -82.
90 Reference (Outside) Laboratory Laboratory procedures performed by a party other than the treating or reporting
physician.
91 Repeat Clinical Diagnostic Laboratory Test Repeat same lab test on same day to obtain multiple test results.
99 Multiple Modifiers Two or more modifiers may be necessary to completely delineate a service.