ICD-10-CM category
M13: Other arthritis
Codes under M13 (Other arthritis). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| M13.0 | Polyarthritis, unspecified | ✓ |
| M13.1 | Monoarthritis, not elsewhere classified | — |
| M13.8 | Other specified arthritis | — |
| M13.10 | Monoarthritis, not elsewhere classified, unspecified site | ✓ |
| M13.11 | Monoarthritis, not elsewhere classified, shoulder | — |
| M13.12 | Monoarthritis, not elsewhere classified, elbow | — |
| M13.13 | Monoarthritis, not elsewhere classified, wrist | — |
| M13.14 | Monoarthritis, not elsewhere classified, hand | — |
| M13.15 | Monoarthritis, not elsewhere classified, hip | — |
| M13.16 | Monoarthritis, not elsewhere classified, knee | — |
| M13.17 | Monoarthritis, not elsewhere classified, ankle and foot | — |
| M13.80 | Other specified arthritis, unspecified site | ✓ |
| M13.81 | Other specified arthritis, shoulder | — |
| M13.82 | Other specified arthritis, elbow | — |
| M13.83 | Other specified arthritis, wrist | — |
| M13.84 | Other specified arthritis, hand | — |
| M13.85 | Other specified arthritis, hip | — |
| M13.86 | Other specified arthritis, knee | — |
| M13.87 | Other specified arthritis, ankle and foot | — |
| M13.88 | Other specified arthritis, other site | ✓ |
| M13.89 | Other specified arthritis, multiple sites | ✓ |
| M13.111 | Monoarthritis, not elsewhere classified, right shoulder | ✓ |
| M13.112 | Monoarthritis, not elsewhere classified, left shoulder | ✓ |
| M13.119 | Monoarthritis, not elsewhere classified, unspecified shoulder | ✓ |
| M13.121 | Monoarthritis, not elsewhere classified, right elbow | ✓ |
| M13.122 | Monoarthritis, not elsewhere classified, left elbow | ✓ |
| M13.129 | Monoarthritis, not elsewhere classified, unspecified elbow | ✓ |
| M13.131 | Monoarthritis, not elsewhere classified, right wrist | ✓ |
| M13.132 | Monoarthritis, not elsewhere classified, left wrist | ✓ |
| M13.139 | Monoarthritis, not elsewhere classified, unspecified wrist | ✓ |
| M13.141 | Monoarthritis, not elsewhere classified, right hand | ✓ |
| M13.142 | Monoarthritis, not elsewhere classified, left hand | ✓ |
| M13.149 | Monoarthritis, not elsewhere classified, unspecified hand | ✓ |
| M13.151 | Monoarthritis, not elsewhere classified, right hip | ✓ |
| M13.152 | Monoarthritis, not elsewhere classified, left hip | ✓ |
| M13.159 | Monoarthritis, not elsewhere classified, unspecified hip | ✓ |
| M13.161 | Monoarthritis, not elsewhere classified, right knee | ✓ |
| M13.162 | Monoarthritis, not elsewhere classified, left knee | ✓ |
| M13.169 | Monoarthritis, not elsewhere classified, unspecified knee | ✓ |
| M13.171 | Monoarthritis, not elsewhere classified, right ankle and foot | ✓ |
| M13.172 | Monoarthritis, not elsewhere classified, left ankle and foot | ✓ |
| M13.179 | Monoarthritis, not elsewhere classified, unspecified ankle and foot | ✓ |
| M13.811 | Other specified arthritis, right shoulder | ✓ |
| M13.812 | Other specified arthritis, left shoulder | ✓ |
| M13.819 | Other specified arthritis, unspecified shoulder | ✓ |
| M13.821 | Other specified arthritis, right elbow | ✓ |
| M13.822 | Other specified arthritis, left elbow | ✓ |
| M13.829 | Other specified arthritis, unspecified elbow | ✓ |
| M13.831 | Other specified arthritis, right wrist | ✓ |
| M13.832 | Other specified arthritis, left wrist | ✓ |
| M13.839 | Other specified arthritis, unspecified wrist | ✓ |
| M13.841 | Other specified arthritis, right hand | ✓ |
| M13.842 | Other specified arthritis, left hand | ✓ |
| M13.849 | Other specified arthritis, unspecified hand | ✓ |
| M13.851 | Other specified arthritis, right hip | ✓ |
| M13.852 | Other specified arthritis, left hip | ✓ |
| M13.859 | Other specified arthritis, unspecified hip | ✓ |
| M13.861 | Other specified arthritis, right knee | ✓ |
| M13.862 | Other specified arthritis, left knee | ✓ |
| M13.869 | Other specified arthritis, unspecified knee | ✓ |
| M13.871 | Other specified arthritis, right ankle and foot | ✓ |
| M13.872 | Other specified arthritis, left ankle and foot | ✓ |
| M13.879 | Other specified arthritis, unspecified ankle and foot | ✓ |
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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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