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ICD-10-CM 2027

ICD-10 code for patella chondromalacia

M22.4

Chondromalacia patellae

Header — needs a more specific code

From the official ICD-10-CM alphabetic index entry “Chondromalacia (systemic) › patella”. Page updated September 29, 2026.

About coding patella chondromalacia

The ICD-10-CM code for patella chondromalacia is M22.4 (Chondromalacia patellae).

Within M22 (disorder of patella), M22.4 is specifically for Chondromalacia patellae. Related codes cover recurrent dislocation of patella (M22.0), recurrent subluxation of patella (M22.1), Patellofemoral disorders (M22.2), other derangements of patella (M22.3), other disorders of patella (M22.8) and unspecified disorder of patella (M22.9).

To report this condition, pick the subcode that matches the documentation: M22.40 (unspecified knee), M22.41 (right knee) and M22.42 (left knee).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Common questions about patella chondromalacia ICD-10 codes

What is the ICD-10 code for patella chondromalacia?

M22.4 — Chondromalacia patellae (a header code; report a more specific subcode).

Is M22.4 billable?

No. M22.4 is a header code. Report one of its more specific subcodes instead.