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ICD-10-CM 2027

ICD-10 code for temporomandibular joint arthritis

M26.64

Arthritis of temporomandibular joint

Header — needs a more specific code

From the official ICD-10-CM alphabetic index entry “Arthritis, arthritic (acute) (chronic) (nonpyogenic) (subacute) › temporomandibular joint”. Page updated September 29, 2026.

About coding temporomandibular joint arthritis

The ICD-10-CM code for temporomandibular joint arthritis is M26.64 (Arthritis of temporomandibular joint).

Within M26.6 (temporomandibular joint disorders), M26.64 is specifically for arthritis of temporomandibular joint. Related codes cover temporomandibular joint disorder, unspecified (M26.60), adhesions and ankylosis of temporomandibular joint (M26.61), arthralgia of temporomandibular joint (M26.62), articular disc disorder of temporomandibular joint (M26.63), arthropathy of temporomandibular joint (M26.65) and other specified disorders of temporomandibular joint (M26.69).

To report this condition, pick the subcode that matches the documentation: M26.641 (joint), M26.642 (joint), M26.643 (joint) and M26.649 (joint).

It was added in FY2021, effective October 1, 2020.

Common questions about temporomandibular joint arthritis ICD-10 codes

What is the ICD-10 code for temporomandibular joint arthritis?

M26.64 — Arthritis of temporomandibular joint (a header code; report a more specific subcode).

Is M26.64 billable?

No. M26.64 is a header code. Report one of its more specific subcodes instead.