Blog
Modifiers 76 and 77
By Linda Tauber, CPC, CPMA, CRC, CPB | AAPC Approved Instructor
Both modifiers identify a repeated procedure or service.
Modifier 76 is used when the same provider performs the repeat service.
Modifier 77 is used when another provider performs it.
Repeated procedures are often denied as duplicates when the claim does not clearly show that the
second service was intentional and medically necessary. Modifiers 76 and 77 help distinguish a
legitimate repeat service from duplicate billing, but the correct modifier depends on who performed
the repeated procedure.
| Modifier | Repeat Service | Who Performed It? | Main Question |
|---|---|---|---|
| 76 | Same procedure or service | Same physician or QHP | Did the same provider repeat it? |
| 77 | Same procedure or service | Different physician or QHP | Did another provider repeat it? |
Qualified health care professional. Always confirm current CPT® and payer-specific reporting instructions.
Use modifier 76 when the same physician or qualified health care professional repeats the same
procedure or service after the original service. The documentation should show why the second service
was medically necessary and confirm that it was not submitted accidentally.
- The same procedure or service is repeated.
- The same provider performs both the original and repeated services.
Report the first service without modifier 76 and append modifier 76 to the repeated service.
another medically necessary chest radiograph is performed later that day. The same radiologist
interprets both studies. Modifier 76 is appended to the repeated professional service when payer
rules permit.
The second line is a duplicate, a different anatomic site is better described by an anatomic modifier,
or the service is a repeat clinical laboratory test that should be reported with modifier 91.
Use modifier 77 when the same procedure or service is repeated by a different physician or qualified
health care professional. The ordering provider does not determine the modifier. The coder must
identify who actually performed the repeated procedure or interpretation.
- The same procedure or service is repeated.
- A different provider performs the repeat service.
another medically necessary EKG is obtained and interpreted by a different physician. The second
physician reports the repeated service with modifier 77, subject to payer policy.
The ordering provider does not determine the modifier. Identify the provider who actually performed
the repeated procedure or interpretation.
Another provider merely reviews the first test. The procedure or service itself must be repeated.
- Confirm that the same procedure or service was actually performed more than once.
- Verify that the repeat service was medically necessary and separately documented.
-
Identify the provider who performed the original service and the provider who performed the repeat
service. - Choose modifier 76 for the same provider or modifier 77 for another provider.
-
Check whether a more specific modifier, such as an anatomic modifier or modifier 91, better describes
the service.
- Choosing modifier 76 or 77 according to who ordered the service instead of who performed it.
- Appending a repeat-service modifier to an accidental duplicate claim line.
-
Using modifier 76 or 77 when the services occurred at different anatomic sites and a more specific
modifier is available. - Using modifier 76 for a repeated clinical laboratory test when modifier 91 is appropriate.
- Failing to document the medical necessity and timing of the repeated service.
- Appending a modifier only to bypass an edit or denial without documentation supporting the modifier.
The same provider repeated the service.
Another provider repeated the service.
Modifiers 76 and 77 should communicate what actually happened during the patient's care. Before
assigning either modifier, verify that the service was truly repeated, that the documentation supports
its medical necessity, and that the performing provider is correctly identified.
Same service + same provider → Modifier 76
Same service + different provider → Modifier 77
- CMS, Billing and Coding: Repeat or Duplicate Services on the Same Day.
- CMS, Medicare NCCI FAQ Library.
Educational Notice:
This article is for general coding education and is not a substitute for the current CPT® codebook,
payer guidance, or review of the complete medical record. Payer policies may vary.
For more coding education, CPC exam tips, and medical coding training:
888-813-2633
|
Call or Text 954-716-3762
Certifying Medical Coders One Student at a Time®