ICD10BillableValid for clinical use

ICD-10 Code M26.659: Arthropathy of unspecified temporomandibular joint

M26.659 is a billable ICD-10 diagnosis code used to classify Arthropathy of unspecified temporomandibular joint in medical records and claims. You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records. ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Diseases of the musculoskeletal system and connective tissue (M00-M99).

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

What is this code?

ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Diseases of the musculoskeletal system and connective tissue (M00-M99).

When is it used?

  • May be used when a clinician documents arthropathy of unspecified temporomandibular joint in a patient's medical record.
  • May appear in hospital records, claims, referrals, and clinical documentation.
  • This code can be used as a clinically usable diagnosis entry in standardized coding workflows.

What it does not mean

  • A code alone does not explain severity, treatment plan, or outcome.
  • A medical code should not be treated as a substitute for a doctor's diagnosis or advice.

Code hierarchy

chapter
13Diseases of the musculoskeletal system and connective tissue (M00-M99)
block
M26-M27Dentofacial anomalies [including malocclusion] and other disorders of jaw
category
M26Dentofacial anomalies [including malocclusion]
category
M26.6Temporomandibular joint disorders
category
M26.65Arthropathy of temporomandibular joint
currentM26.65

Where you may see this code

You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.

Related specialists

Orthopedic SpecialistRheumatologist

Coding guidelines

Common synonyms

Arthropathy of unspecified temporomandibular jointArthropathy of temporomandibular joint

Frequently asked questions

Code details

CodeM26.659
SystemICD10
Display nameArthropathy of unspecified temporomandibular joint
ChapterDiseases of the musculoskeletal system and connective tissue (M00-M99)
BlockDentofacial anomalies [including malocclusion] and other disorders of jaw

Flags

BillableYes
Valid clinical useYes

Source

SourceICD-10
Version2026-annual
Releaseannual
Year2026

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.

ICD-10 Code M26.659 for Arthropathy of unspecified temporomandibular joint | HealthAssure