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	—
M22.00	Recurrent dislocation of patella, unspecified knee	✓
M22.01	Recurrent dislocation of patella, right knee	✓
M22.1	Recurrent subluxation of patella	—
M22.02	Recurrent dislocation of patella, left knee	✓
M22.2	Patellofemoral disorders	—
M22.2X	Patellofemoral disorders	—
M22.2X1	Patellofemoral disorders, right knee	✓
M22.2X2	Patellofemoral disorders, left knee	✓
M22.2X9	Patellofemoral disorders, unspecified knee	✓
M22.3	Other derangements of patella	—
M22.3X	Other derangements of patella	—
M22.3X1	Other derangements of patella, right knee	✓
M22.3X2	Other derangements of patella, left knee	✓
M22.3X9	Other derangements of patella, unspecified knee	✓
M22.4	Chondromalacia patellae	—
M22.8	Other disorders of patella	—
M22.8X	Other disorders of patella	—
M22.8X1	Other disorders of patella, right knee	✓
M22.8X2	Other disorders of patella, left knee	✓
M22.8X9	Other disorders of patella, unspecified knee	✓
M22.9	Unspecified disorder of patella	—
M22.10	Recurrent subluxation of patella, unspecified knee	✓
M22.11	Recurrent subluxation of patella, right knee	✓
M22.12	Recurrent subluxation of patella, left knee	✓
M22.40	Chondromalacia patellae, unspecified knee	✓
M22.41	Chondromalacia patellae, right knee	✓
M22.42	Chondromalacia patellae, left knee	✓
M22.90	Unspecified disorder of patella, unspecified knee	✓
M22.91	Unspecified disorder of patella, right knee	✓
M22.92	Unspecified disorder of patella, left knee	✓

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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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