ICD-10-CM 2027 diagnosis code

M22Disorder of patella

Not billable — use a more specific code

M22 is a header code, so it can't be reported by itself. Choose one of the 7 more specific codes beneath it.

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 M22

M22 is the ICD-10-CM diagnosis code for disorder of patella. It belongs to block M20-M25 (other joint disorders) 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 7 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: M22.0 (patella), M22.1 (patella), M22.2 (disorders), M22.3 (patella), M22.4 (patellae), M22.8 (patella) and M22.9 (patella).

The conditions in its Excludes2 note aren't part of M22, but may be coded alongside it if the patient has both: traumatic dislocation of patella (S83.0-).

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 M22

Coding notes

Excludes2Not included here — may be reported together if both conditions exist

traumatic dislocation of patella (S83.0-)

Notes that apply from higher levels

Instructions written at a parent level also apply to M22.

Broader instructions also apply from M20-M25 Other joint disorders and Chapter 13: Diseases of the musculoskeletal system and connective tissue.

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 M22

Is M22 billable?: No. M22 is a header code. Report one of its more specific subcodes instead.