ICD-10-CM › M00-M99 › M20-M25 › M22 Disorder of patella › M22.4
Chondromalacia patellae
Not billableICD-10-CM diagnosis code.
This code exists but cannot be submitted on its own. It groups the more specific codes beneath it.
Submit one of these 3 more specific codes instead:
What has happened to this code
Every change the publisher made, from 2012 to now. Entries marked draft are from the pre-implementation releases: ICD-10 took effect on 1 October 2015, so nothing before FY2016 was ever valid on a claim.
- FY2012 Added to the draft code set draft Chondromalacia patellae
Official coding rules
Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.
Inherited from M22 Disorder of patella
Excludes2 - not included here
- traumatic dislocation of patella (S83.0-)
Inherited from the M20-M25 section Other joint disorders (M20-M25)
Excludes2 - not included here
- joints of the spine (M40-M54)
How CDC's index refers to this code
Wording from the official alphabetic index. Much of it appears nowhere in the code description, which is why a search for the everyday phrase so often finds nothing.
- Chondritis > patella, posttraumatic
- Disorder > patella > chondromalacia
- Chondromalacia > patella
- Chondromalacia > knee > patella
- Softening > cartilage > patella
Codes in the same group
| Code | Description | Status |
|---|---|---|
| M22.0 | Recurrent dislocation of patella | Not billable |
| M22.1 | Recurrent subluxation of patella | Not billable |
| M22.2 | Patellofemoral disorders | Not billable |
| M22.3 | Other derangements of patella | Not billable |
| M22.8 | Other disorders of patella | Not billable |
| M22.9 | Unspecified disorder of patella | Not billable |