M65.91

Non-billable

Unspecified synovitis and tenosynovitis, shoulder

M65.91 is the ICD-10-CM code for Unspecified synovitis and tenosynovitis, shoulder. It is a non-billable category code — use a more specific child code such as M65.911 for billing.

Status
Header (non-billable)
Chapter
M00-M99
Parent
M65.9
Subcodes
3
Edition
FY2026

M00-M99 Diseases of the musculoskeletal system and connective tissue

No additional coding notes for this code.

Medications indicated for this condition

FDA labeling

Drugs whose FDA labeling lists this condition's category among its indications. Informational only — not a treatment recommendation or medical advice.

Conditions mapped to this code

MedlinePlus · NIH

Plain-language health-topic references grounded in MedlinePlus (NIH/NLM).

Frequently asked questions

What is ICD-10 code M65.91?
M65.91 is the ICD-10-CM code for "Unspecified synovitis and tenosynovitis, shoulder". It falls under M00-M99 Diseases of the musculoskeletal system and connective tissue.
Is M65.91 a billable code?
No — M65.91 is a non-billable header code. Use a more specific child code (such as M65.911) for billing.
What are the subcodes of M65.91?
M65.91 has 3 more specific child codes, including M65.911, M65.912, M65.919.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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