M79.12 — Myalgia of auxiliary muscles, head and neck
Is M79.12 billable?
Yes — M79.12 is billable for FY2027. M79.12 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. M79.12 may be submitted for encounters from October 1, 2026 through September 30, 2027.
M79.12 at a glance
| Code | M79.12 |
|---|---|
| Description | Myalgia of auxiliary muscles, head and neck |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does M79.12 group to?
M79.12 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.
- 555Signs and Symptoms of Musculoskeletal System and Connective Tissue with MCCmedical
- 556Signs and Symptoms of Musculoskeletal System and Connective Tissue without MCCmedical
How is M79.12 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to M79.12. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Myalgia › auxiliary muscles, head and neck
Excludes1 — never code together — inherited from M79
The conditions below can never be reported together with M79.12 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Excludes1 — never code together — inherited from M79.1
The conditions below can never be reported together with M79.12 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Excludes2 — not included here — inherited from Chapter 13
The conditions below are not part of M79.12, but a patient may have both at the same time. When documentation supports it, M79.12 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)
How long has M79.12 existed?
M79.12 first appears in FY2019.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.