M77.00 — Medial epicondylitis, unspecified elbow
Is M77.00 billable?
Yes, but M77.00 is an unspecified code. M77.00 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, M77.00 is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting M77.00 — the more specific alternatives are listed below.
More specific alternatives
M77.00 at a glance
| Code | M77.00 |
|---|---|
| Description | Medial epicondylitis, unspecified elbow |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does M77.00 group to?
M77.00 sits in MDC 08 and helps define the logic of 2 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 557Tendonitis, Myositis and Bursitis with MCCmedical
- 558Tendonitis, Myositis and Bursitis without MCCmedical
How is M77.00 listed in the Alphabetic Index?
The Alphabetic Index lists these routes under M77.0, the nearest indexed parent of M77.00. Use them to find the family, then select the specific code.
- Epicondylitis › medial (elbow)
Excludes1 — never code together — inherited from M77
The conditions below can never be reported together with M77.00 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- bursitis NOS (M71.9-)
Excludes2 — not included here — inherited from Chapter 13
The conditions below are not part of M77.00, but a patient may have both at the same time. When documentation supports it, M77.00 and the excluded code may both be reported.
- arthropathic psoriasis (L40.5-)
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- compartment syndrome (traumatic) (T79.A-)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Excludes2 — not included here — inherited from M77
The conditions below are not part of M77.00, but a patient may have both at the same time. When documentation supports it, M77.00 and the excluded code may both be reported.
How long has M77.00 existed?
M77.00 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.