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ICD-10-CM · FY 2026 APRIL UPDATE

M65.9

Synovitis and tenosynovitis, unspecified

Diagnosis reference

Nonbillable category

This entry is a category or subcategory. Choose the appropriate billable descendant based on the clinical documentation.

Effective periodOctober 1, 2026–September 30, 2027
SourceCMS ICD-10-CM order file
ClassificationDiagnosis · clinical modification

Related entries

Up to 30 descendants in this category

CODEDESCRIPTIONTYPE
M65.90Unspecified synovitis and tenosynovitis, unspecified siteBillable
M65.91Unspecified synovitis and tenosynovitis, shoulderCategory
M65.911Unspecified synovitis and tenosynovitis, right shoulderBillable
M65.912Unspecified synovitis and tenosynovitis, left shoulderBillable
M65.919Unspecified synovitis and tenosynovitis, unspecified shoulderBillable
M65.92Unspecified synovitis and tenosynovitis, upper armCategory
M65.921Unspecified synovitis and tenosynovitis, right upper armBillable
M65.922Unspecified synovitis and tenosynovitis, left upper armBillable
M65.929Unspecified synovitis and tenosynovitis, unspecified upper armBillable
M65.93Unspecified synovitis and tenosynovitis, forearmCategory
M65.931Unspecified synovitis and tenosynovitis, right forearmBillable
M65.932Unspecified synovitis and tenosynovitis, left forearmBillable
M65.939Unspecified synovitis and tenosynovitis, unspecified forearmBillable
M65.94Unspecified synovitis and tenosynovitis, handCategory
M65.941Unspecified synovitis and tenosynovitis, right handBillable
M65.942Unspecified synovitis and tenosynovitis, left handBillable
M65.949Unspecified synovitis and tenosynovitis, unspecified handBillable
M65.95Unspecified synovitis and tenosynovitis, thighCategory
M65.951Unspecified synovitis and tenosynovitis, right thighBillable
M65.952Unspecified synovitis and tenosynovitis, left thighBillable
M65.959Unspecified synovitis and tenosynovitis, unspecified thighBillable
M65.96Unspecified synovitis and tenosynovitis, lower legCategory
M65.961Unspecified synovitis and tenosynovitis, right lower legBillable
M65.962Unspecified synovitis and tenosynovitis, left lower legBillable
M65.969Unspecified synovitis and tenosynovitis, unspecified lower legBillable
M65.97Unspecified synovitis and tenosynovitis, ankle and footCategory
M65.971Unspecified synovitis and tenosynovitis, right ankle and footBillable
M65.972Unspecified synovitis and tenosynovitis, left ankle and footBillable
M65.979Unspecified synovitis and tenosynovitis, unspecified ankle and footBillable
M65.98Unspecified synovitis and tenosynovitis, other siteBillable

Use the complete reference

This reference does not reproduce the full tabular hierarchy, inclusion notes, Excludes1/2 notes, sequencing instructions, or seventh-character rules. Review the official tables and coding guidelines.

Open official CMS files

ICD-10-CM codes describe diagnoses. They do not have an independent Medicare PFS reimbursement amount, and billability alone does not establish coverage.