Disorder of patella (M22) ICD-10-CM
The M22 code range covers disorder of patella with 32 ICD-10-CM diagnosis codes. 21 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
- traumatic dislocation of patella S83.0
Codes in the M22 Range 32 codes · 21 billable
- M22 Disorder of patellaNon-billable
- M22.0 Recurrent dislocation of patellaNon-billable
- M22.00 Recurrent dislocation of patella, unspecified knee
- M22.01 Recurrent dislocation of patella, right knee
- M22.02 Recurrent dislocation of patella, left knee
- M22.1 Recurrent subluxation of patellaNon-billable
- M22.10 Recurrent subluxation of patella, unspecified knee
- M22.11 Recurrent subluxation of patella, right knee
- M22.12 Recurrent subluxation of patella, left knee
- M22.2 Patellofemoral disordersNon-billable
- M22.2X Patellofemoral disordersNon-billable
- M22.2X1 Patellofemoral disorders, right knee
- M22.2X2 Patellofemoral disorders, left knee
- M22.2X9 Patellofemoral disorders, unspecified knee
- M22.3 Other derangements of patellaNon-billable
- M22.3X Other derangements of patellaNon-billable
- 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 patellaeNon-billable
- M22.40 Chondromalacia patellae, unspecified knee
- M22.41 Chondromalacia patellae, right knee
- M22.42 Chondromalacia patellae, left knee
- M22.8 Other disorders of patellaNon-billable
- M22.8X Other disorders of patellaNon-billable
- 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 patellaNon-billable
- M22.90 Unspecified disorder of patella, unspecified knee
- M22.91 Unspecified disorder of patella, right knee
- M22.92 Unspecified disorder of patella, left knee
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the M22 range.
Chondromalacia Patellae
A degeneration of the ARTICULAR CARTILAGE of the PATELLA, caused by a decrease in sulfated MUCOPOLYSACCHARIDES in the ground substance. When accompanied by pain, it is sometimes considered part of or confused with PATELLOFEMORAL PAIN SYNDROME.
About the M22 Code Range
These disorders affect the patella, or kneecap. They include recurrent dislocation, recurrent subluxation, and other kneecap conditions.
The category separates recurrent dislocation (M22.0) from recurrent subluxation (M22.1). Other groups identify patellofemoral disorders (M22.2), patellar derangements (M22.3), and chondromalacia of the patella (M22.4). The remaining groups identify other patellar disorders (M22.8) or an unspecified patellar disorder (M22.9). Each group has subdivisions for the right knee, left knee, or an unspecified knee.
Questions About This Page
How many billable codes are in the M22 range?
Of the 32 codes in this range, 21 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the M22 range classify?
The range classifies disorder of patella. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
