M65.99
Billable codeUnspecified synovitis and tenosynovitis, multiple sites
The ICD-10 code for unspecified synovitis and tenosynovitis, multiple sites is M65.99.
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Related codes in this category
- M65.90Unspecified synovitis and tenosynovitis, unspecified site
- M65.91Unspecified synovitis and tenosynovitis, shouldernon-billable header
- M65.92Unspecified synovitis and tenosynovitis, upper armnon-billable header
- M65.93Unspecified synovitis and tenosynovitis, forearmnon-billable header
- M65.94Unspecified synovitis and tenosynovitis, handnon-billable header
- M65.95Unspecified synovitis and tenosynovitis, thighnon-billable header
- M65.96Unspecified synovitis and tenosynovitis, lower legnon-billable header
- M65.97Unspecified synovitis and tenosynovitis, ankle and footnon-billable header
- M65.98Unspecified synovitis and tenosynovitis, other site
- M65.99Unspecified synovitis and tenosynovitis, multiple sites
Associated MS-DRGs
M65.99 can serve as the principal diagnosis for these Medicare Severity Diagnosis-Related Groups.
Informational only — actual DRG assignment also depends on procedures, complications/comorbidities (CC/MCC), discharge status, and payer-specific rules not reflected here.