Back to ICD-10 library
ICD-10-CM · FY 2026 APRIL UPDATE

M65.8

Other synovitis and tenosynovitis

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
M65.80Other synovitis and tenosynovitis, unspecified siteBillable
M65.81Other synovitis and tenosynovitis, shoulderCategory
M65.811Other synovitis and tenosynovitis, right shoulderBillable
M65.812Other synovitis and tenosynovitis, left shoulderBillable
M65.819Other synovitis and tenosynovitis, unspecified shoulderBillable
M65.82Other synovitis and tenosynovitis, upper armCategory
M65.821Other synovitis and tenosynovitis, right upper armBillable
M65.822Other synovitis and tenosynovitis, left upper armBillable
M65.829Other synovitis and tenosynovitis, unspecified upper armBillable
M65.83Other synovitis and tenosynovitis, forearmCategory
M65.831Other synovitis and tenosynovitis, right forearmBillable
M65.832Other synovitis and tenosynovitis, left forearmBillable
M65.839Other synovitis and tenosynovitis, unspecified forearmBillable
M65.84Other synovitis and tenosynovitis, handCategory
M65.841Other synovitis and tenosynovitis, right handBillable
M65.842Other synovitis and tenosynovitis, left handBillable
M65.849Other synovitis and tenosynovitis, unspecified handBillable
M65.85Other synovitis and tenosynovitis, thighCategory
M65.851Other synovitis and tenosynovitis, right thighBillable
M65.852Other synovitis and tenosynovitis, left thighBillable
M65.859Other synovitis and tenosynovitis, unspecified thighBillable
M65.86Other synovitis and tenosynovitis, lower legCategory
M65.861Other synovitis and tenosynovitis, right lower legBillable
M65.862Other synovitis and tenosynovitis, left lower legBillable
M65.869Other synovitis and tenosynovitis, unspecified lower legBillable
M65.87Other synovitis and tenosynovitis, ankle and footCategory
M65.871Other synovitis and tenosynovitis, right ankle and footBillable
M65.872Other synovitis and tenosynovitis, left ankle and footBillable
M65.879Other synovitis and tenosynovitis, unspecified ankle and footBillable
M65.88Other 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.