M22.4Header code — not billable
Chondromalacia patellae
- Chapter
- 13. Diseases of the musculoskeletal system and connective tissue
- Category
- M22
- Effective date
- October 1, 2026
Related codes in category M22
M22Disorder of patellaM22.0Recurrent dislocation of patellaM22.00Recurrent dislocation of patella, unspecified kneeYesM22.01Recurrent dislocation of patella, right kneeYesM22.02Recurrent dislocation of patella, left kneeYesM22.1Recurrent subluxation of patellaM22.10Recurrent subluxation of patella, unspecified kneeYesM22.11Recurrent subluxation of patella, right kneeYesM22.12Recurrent subluxation of patella, left kneeYesM22.2Patellofemoral disordersM22.2XPatellofemoral disordersM22.2X1Patellofemoral disorders, right kneeYes
Frequently asked questions
What is ICD-10 code M22.4?
M22.4 is an ICD-10-CM diagnosis code for Chondromalacia patellae.
Is M22.4 a billable code?
No. M22.4 is a category/header code, not billable on its own — use one of its more specific child codes instead.
What ICD-10-CM chapter is M22.4 in?
M22.4 falls under Chapter 13: Diseases of the musculoskeletal system and connective tissue.
When did M22.4 become effective?
M22.4 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to M22.4?
M22.4 belongs to category M22, which includes 12 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.