M12.221 — Villonodular synovitis (pigmented), right elbow
Is M12.221 billable?
Yes — M12.221 is billable for FY2027. M12.221 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. M12.221 may be submitted for encounters from October 1, 2026 through September 30, 2027.
M12.221 at a glance
| Code | M12.221 |
|---|---|
| Description | Villonodular synovitis (pigmented), right elbow |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does M12.221 group to?
M12.221 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.
- 553Bone Diseases and Arthropathies with MCCmedical
- 554Bone Diseases and Arthropathies without MCCmedical
How is M12.221 listed in the Alphabetic Index?
The Alphabetic Index lists these routes under M12.22, the nearest indexed parent of M12.221. Use them to find the family, then select the specific code.
- Synovitis › villonodular › elbow
Excludes1 — never code together — inherited from M12
The conditions below can never be reported together with M12.221 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 M12.221, but a patient may have both at the same time. When documentation supports it, M12.221 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 M12.221 existed?
M12.221 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.