M65.911 (Unspecified synovitis and tenosynovitis, right shoulder) compared with M65.912 (Unspecified synovitis and tenosynovitis, left shoulder), from the official CMS tabular data. M65.911 and M65.912 code the same condition on opposite sides. MedCoder-derived
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. M65.911 and M65.912 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.
| M65.911Unspecified synovitis and tenosynovitis, right shoulder | M65.912Unspecified synovitis and tenosynovitis, left 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 | Unspecified synovitis and tenosynovitis, right shoulder is a billable ICD-10-CM diagnosis code (M65.911). | Unspecified synovitis and tenosynovitis, left shoulder is a billable ICD-10-CM diagnosis code (M65.912). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources