ICD-10-CM > M00-M99 > M26-M27 > M26 > M26.6 > M26.64 M26.64 Arthritis of temporomandibular joint Non-Billable/Non-Specific Codes M26.641Arthritis of right temporomandibular jointM26.642Arthritis of left temporomandibular jointM26.643Arthritis of bilateral temporomandibular jointM26.649Arthritis of unspecified temporomandibular joint