ICD-10-CM · Chapter 13 · M00-M99
M13 Other arthritis
Excludes 1 (cannot be coded together)
- arthrosis (M15-M19)
- osteoarthritis (M15-M19)
Subcodes
Subcodes are listed below for reference. Detail pages are not available for chapters 11–22.
| Code | Description | Billable |
|---|---|---|
| M13..0 | Polyarthritis, unspecified | Yes |
| M13..1 | Monoarthritis, not elsewhere classified | No |
| M13..10 | Monoarthritis, not elsewhere classified, unspecified site | Yes |
| M13..11 | Monoarthritis, not elsewhere classified, shoulder | No |
| M13..111 | Monoarthritis, not elsewhere classified, right shoulder | Yes |
| M13..112 | Monoarthritis, not elsewhere classified, left shoulder | Yes |
| M13..119 | Monoarthritis, not elsewhere classified, unspecified shoulder | Yes |
| M13..12 | Monoarthritis, not elsewhere classified, elbow | No |
| M13..121 | Monoarthritis, not elsewhere classified, right elbow | Yes |
| M13..122 | Monoarthritis, not elsewhere classified, left elbow | Yes |
| M13..129 | Monoarthritis, not elsewhere classified, unspecified elbow | Yes |
| M13..13 | Monoarthritis, not elsewhere classified, wrist | No |
| M13..131 | Monoarthritis, not elsewhere classified, right wrist | Yes |
| M13..132 | Monoarthritis, not elsewhere classified, left wrist | Yes |
| M13..139 | Monoarthritis, not elsewhere classified, unspecified wrist | Yes |
| M13..14 | Monoarthritis, not elsewhere classified, hand | No |
| M13..141 | Monoarthritis, not elsewhere classified, right hand | Yes |
| M13..142 | Monoarthritis, not elsewhere classified, left hand | Yes |
| M13..149 | Monoarthritis, not elsewhere classified, unspecified hand | Yes |
| M13..15 | Monoarthritis, not elsewhere classified, hip | No |
| M13..151 | Monoarthritis, not elsewhere classified, right hip | Yes |
| M13..152 | Monoarthritis, not elsewhere classified, left hip | Yes |
| M13..159 | Monoarthritis, not elsewhere classified, unspecified hip | Yes |
| M13..16 | Monoarthritis, not elsewhere classified, knee | No |
| M13..161 | Monoarthritis, not elsewhere classified, right knee | Yes |
| M13..162 | Monoarthritis, not elsewhere classified, left knee | Yes |
| M13..169 | Monoarthritis, not elsewhere classified, unspecified knee | Yes |
| M13..17 | Monoarthritis, not elsewhere classified, ankle and foot | No |
| M13..171 | Monoarthritis, not elsewhere classified, right ankle and foot | Yes |
| M13..172 | Monoarthritis, not elsewhere classified, left ankle and foot | Yes |
| M13..179 | Monoarthritis, not elsewhere classified, unspecified ankle and foot | Yes |
| M13..8 | Other specified arthritis | No |
| M13..80 | Other specified arthritis, unspecified site | Yes |
| M13..81 | Other specified arthritis, shoulder | No |
| M13..811 | Other specified arthritis, right shoulder | Yes |
| M13..812 | Other specified arthritis, left shoulder | Yes |
| M13..819 | Other specified arthritis, unspecified shoulder | Yes |
| M13..82 | Other specified arthritis, elbow | No |
| M13..821 | Other specified arthritis, right elbow | Yes |
| M13..822 | Other specified arthritis, left elbow | Yes |
| M13..829 | Other specified arthritis, unspecified elbow | Yes |
| M13..83 | Other specified arthritis, wrist | No |
| M13..831 | Other specified arthritis, right wrist | Yes |
| M13..832 | Other specified arthritis, left wrist | Yes |
| M13..839 | Other specified arthritis, unspecified wrist | Yes |
| M13..84 | Other specified arthritis, hand | No |
| M13..841 | Other specified arthritis, right hand | Yes |
| M13..842 | Other specified arthritis, left hand | Yes |
| M13..849 | Other specified arthritis, unspecified hand | Yes |
| M13..85 | Other specified arthritis, hip | No |
| M13..851 | Other specified arthritis, right hip | Yes |
| M13..852 | Other specified arthritis, left hip | Yes |
| M13..859 | Other specified arthritis, unspecified hip | Yes |
| M13..86 | Other specified arthritis, knee | No |
| M13..861 | Other specified arthritis, right knee | Yes |
| M13..862 | Other specified arthritis, left knee | Yes |
| M13..869 | Other specified arthritis, unspecified knee | Yes |
| M13..87 | Other specified arthritis, ankle and foot | No |
| M13..871 | Other specified arthritis, right ankle and foot | Yes |
| M13..872 | Other specified arthritis, left ankle and foot | Yes |
| M13..879 | Other specified arthritis, unspecified ankle and foot | Yes |
| M13..88 | Other specified arthritis, other site | Yes |
| M13..89 | Other specified arthritis, multiple sites | Yes |
Last reviewed: September 2026