M22: Disorder of patella
Codes under M22 (Disorder of patella). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| M22.0 | Recurrent dislocation of patella | — |
| M22.0 | Recurrent dislocation of patella | — |
| M22.00 | Recurrent dislocation of patella, unspecified knee | ✓ |
| M22.00 | Recurrent dislocation of patella, unspecified knee | ✓ |
| M22.01 | Recurrent dislocation of patella, right knee | ✓ |
| M22.01 | Recurrent dislocation of patella, right knee | ✓ |
| M22.1 | Recurrent subluxation of patella | — |
| M22.1 | Recurrent subluxation of patella | — |
| M22.02 | Recurrent dislocation of patella, left knee | ✓ |
| M22.02 | Recurrent dislocation of patella, left knee | ✓ |
| M22.2 | Patellofemoral disorders | — |
| M22.2 | Patellofemoral disorders | — |
| M22.2X | Patellofemoral disorders | — |
| M22.2X | Patellofemoral disorders | — |
| M22.2X1 | Patellofemoral disorders, right knee | ✓ |
| M22.2X1 | Patellofemoral disorders, right knee | ✓ |
| M22.2X2 | Patellofemoral disorders, left knee | ✓ |
| M22.2X2 | Patellofemoral disorders, left knee | ✓ |
| M22.2X9 | Patellofemoral disorders, unspecified knee | ✓ |
| M22.2X9 | Patellofemoral disorders, unspecified knee | ✓ |
| M22.3 | Other derangements of patella | — |
| M22.3 | Other derangements of patella | — |
| M22.3X | Other derangements of patella | — |
| M22.3X | Other derangements of patella | — |
| M22.3X1 | Other derangements of patella, right knee | ✓ |
| M22.3X1 | Other derangements of patella, right knee | ✓ |
| M22.3X2 | Other derangements of patella, left knee | ✓ |
| M22.3X2 | Other derangements of patella, left knee | ✓ |
| M22.3X9 | Other derangements of patella, unspecified knee | ✓ |
| M22.3X9 | Other derangements of patella, unspecified knee | ✓ |
| M22.4 | Chondromalacia patellae | — |
| M22.4 | Chondromalacia patellae | — |
| M22.8 | Other disorders of patella | — |
| M22.8 | Other disorders of patella | — |
| M22.8X | Other disorders of patella | — |
| M22.8X | Other disorders of patella | — |
| M22.8X1 | Other disorders of patella, right knee | ✓ |
| M22.8X1 | Other disorders of patella, right knee | ✓ |
| M22.8X2 | Other disorders of patella, left knee | ✓ |
| M22.8X2 | Other disorders of patella, left knee | ✓ |
| M22.8X9 | Other disorders of patella, unspecified knee | ✓ |
| M22.8X9 | Other disorders of patella, unspecified knee | ✓ |
| M22.9 | Unspecified disorder of patella | — |
| M22.9 | Unspecified disorder of patella | — |
| M22.10 | Recurrent subluxation of patella, unspecified knee | ✓ |
| M22.10 | Recurrent subluxation of patella, unspecified knee | ✓ |
| M22.11 | Recurrent subluxation of patella, right knee | ✓ |
| M22.11 | Recurrent subluxation of patella, right knee | ✓ |
| M22.12 | Recurrent subluxation of patella, left knee | ✓ |
| M22.12 | Recurrent subluxation of patella, left knee | ✓ |
| M22.40 | Chondromalacia patellae, unspecified knee | ✓ |
| M22.40 | Chondromalacia patellae, unspecified knee | ✓ |
| M22.41 | Chondromalacia patellae, right knee | ✓ |
| M22.41 | Chondromalacia patellae, right knee | ✓ |
| M22.42 | Chondromalacia patellae, left knee | ✓ |
| M22.42 | Chondromalacia patellae, left knee | ✓ |
| M22.90 | Unspecified disorder of patella, unspecified knee | ✓ |
| M22.90 | Unspecified disorder of patella, unspecified knee | ✓ |
| M22.91 | Unspecified disorder of patella, right knee | ✓ |
| M22.91 | Unspecified disorder of patella, right knee | ✓ |
| M22.92 | Unspecified disorder of patella, left knee | ✓ |
| M22.92 | Unspecified disorder of patella, left knee | ✓ |
Frequently asked questions
What is ICD-10-CM code M22?
M22 is an ICD-10-CM category covering Disorder of patella. It contains 62 more specific diagnosis codes, 42 of which are billable.
Is M22 a billable code?
No — M22 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example M22.0 — Recurrent dislocation of patella). 42 of the 62 codes under M22 are billable.
What codes fall under M22?
M22 includes M22.0, M22.0, M22.00, M22.00, M22.01, plus 57 more. See the full list with descriptions and billable status above.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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