M13.812 (Other specified arthritis, left shoulder) compared with M13.819 (Other specified arthritis, unspecified shoulder), from the official CMS tabular data. M13.812 and M13.819 code the same condition on opposite sides.
Same condition; these differ only in which side is documented.
These codes share a category and title and differ only in the side affected. The documentation decides which applies, and a bilateral code is reported only where the code set provides one.
Source: ICD-10-CM tabular list (laterality variant derived from the code title)
Same condition, opposite side. M13.812 and M13.819 name the same condition on opposite sides of the body.
Same category and title, differing only in which side is affected — the documentation decides which one applies, and a bilateral code is reported only where the code set provides one.
| M13.812Other specified arthritis, left shoulder | M13.819Other specified arthritis, unspecified shoulder | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | M00-M99 — Diseases of the Musculoskeletal System and Connective Tissue (M00-M99) | M00-M99 — Diseases of the Musculoskeletal System and Connective Tissue (M00-M99) |
| Definition | Other specified arthritis, left shoulder is a billable ICD-10-CM diagnosis code (M13.812). | Other specified arthritis, unspecified shoulder is a billable ICD-10-CM diagnosis code (M13.819). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources