ICD-10-CM 2027 diagnosis code
M12.2Villonodular synovitis (pigmented)
M12.2 is a header code, so it can't be reported by itself. Choose one of the 10 more specific codes beneath it.
Looking up by condition? See ICD-10 code for Villonodular pigmented synovitis.
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About M12.2
M12.2 is the ICD-10-CM diagnosis code for Villonodular synovitis (pigmented). It belongs to category M12 (other and unspecified arthropathy), block M05-M14 (inflammatory polyarthropathies) and chapter 13 (diseases of the musculoskeletal system and connective tissue). It is a header code, so it can't be reported by itself; one of its 10 subcodes must be used instead.
Within M12 (other and unspecified arthropathy), M12.2 is specifically for Villonodular synovitis (pigmented). Related codes cover chronic postrheumatic arthropathy [Jaccoud] (M12.0), Kaschin-Beck disease (M12.1), Palindromic rheumatism (M12.3), intermittent hydrarthrosis (M12.4), traumatic arthropathy (M12.5), other specific arthropathies, not elsewhere classified (M12.8) and arthropathy, unspecified (M12.9).
To report this condition, pick the subcode that matches the documentation: M12.20 (unspecified site), M12.21 (shoulder), M12.22 (elbow), M12.23 (wrist), M12.24 (hand), M12.25 (hip), M12.26 (knee), M12.27 (ankle and foot) and 2 more.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Specific codes under M12.2
- M12.20Villonodular synovitis (pigmented), unspecified siteBillable
- M12.21Villonodular synovitis (pigmented), shoulder
- M12.22Villonodular synovitis (pigmented), elbow
- M12.23Villonodular synovitis (pigmented), wrist
- M12.24Villonodular synovitis (pigmented), hand
- M12.25Villonodular synovitis (pigmented), hip
- M12.26Villonodular synovitis (pigmented), knee
- M12.27Villonodular synovitis (pigmented), ankle and foot
- M12.28Villonodular synovitis (pigmented), other specified siteBillable
- M12.29Villonodular synovitis (pigmented), multiple sitesBillable
Notes that apply from higher levels
Instructions written at a parent level also apply to M12.2.
Broader instructions also apply from Chapter 13: Diseases of the musculoskeletal system and connective tissue.
Alphabetic index entries
1 entriesTerms in the official ICD-10-CM index that lead to M12.2.
Codes whose notes reference M12.2
- M67.2Excludes1
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about M12.2
Is M12.2 billable?
- No. M12.2 is a header code. Report one of its more specific subcodes instead.