M65.8 ICD-10-CM Code: Other synovitis and tenosynovitis
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Code definition
Official description
M65.8Other synovitis and tenosynovitis
ICD-10-CM diagnosis code · United States clinical modification
Classification
Where M65.8 sits
- 1
Chapter 13
Diseases of the musculoskeletal system and connective tissue (M00-M99)
- 2
Section
Disorders of synovium and tendon (M65-M67)
- 3
Category M65
Synovitis and tenosynovitis
- 4
Code M65.8
Other synovitis and tenosynovitis
More specific choices
Codes under M65.8
M65.8 is a non-billable category. Choose the child code that best matches the documented diagnosis.
M65.80Other synovitis and tenosynovitis, unspecified site
M65.81Other synovitis and tenosynovitis, shoulder
M65.82Other synovitis and tenosynovitis, upper arm
M65.83Other synovitis and tenosynovitis, forearm
M65.84Other synovitis and tenosynovitis, hand
M65.85Other synovitis and tenosynovitis, thigh
M65.86Other synovitis and tenosynovitis, lower leg
M65.87Other synovitis and tenosynovitis, ankle and foot
M65.88Other synovitis and tenosynovitis, other site
M65.89Other synovitis and tenosynovitis, multiple sites
Documentation details
Notes for this code
Inclusion terms
No inclusion terms are listed for M65.8.
Code first
No “code first” instruction is listed for M65.8.
Use additional code
No “use additional code” instruction is listed for M65.8.
Excludes1
Conditions that should not be reported together with this code.
No Excludes1 note is listed for M65.8.
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for M65.8.
Transparency
Source and release
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Review the CDC/NCHS ICD-10-CM sourceCode-specific guidance
Frequently asked questions
What does ICD-10-CM code M65.8 mean?
M65.8 is the FY 2027 U.S. ICD-10-CM code for “Other synovitis and tenosynovitis.”
Is M65.8 a billable or specific ICD-10-CM code?
No. M65.8 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.
Where is M65.8 located in ICD-10-CM?
M65.8 is listed in Chapter 13, Diseases of the musculoskeletal system and connective tissue (M00-M99), within Disorders of synovium and tendon (M65-M67) (M65–M67), under category M65, Synovitis and tenosynovitis.
What coding notes are listed for M65.8?
No inclusion terms are listed for M65.8 in this reference record. No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.
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