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M26.59

M26.59: Other dentofacial functional abnormalities

Billable / specific codeICD-10-CM

M26.59 is a billable, specific ICD-10-CM code for other dentofacial functional abnormalities. It is valid for submission on a claim.

Check M26.59 with the rest of the claim: free scrubber

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

  • Centric occlusion (of teeth) NOS
  • Malocclusion due to abnormal swallowing
  • Malocclusion due to mouth breathing
  • Malocclusion due to tongue, lip or finger habits

Excludes1 inherited from the categories above M26.59

A category’s note binds every code beneath it.

Written on M26.5: Dentofacial functional abnormalities

Other codes that can never be billed with M26.59

Their own Excludes1 notes name this code, so the conflict is not listed above.

  • M26.55Centric occlusion maximum intercuspation discrepancy
  • Q18Other congenital malformations of face and neck
  • Q38Other congenital malformations of tongue, mouth and pharynx
  • Q67.4Other congenital deformities of skull, face and jaw
  • Q75Other congenital malformations of skull and face bones

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Medicare coverage

M26.59 is named in 8 Medicare coverage policies: 1 listing it as supporting medical necessity, and 7 listing it as NOT covered. Which one applies depends on your Medicare contractor.

  • A58865Billing and Coding: Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Woundnot covered
  • A58883Billing and Coding: Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Woundnot covered
  • A58893Billing and Coding: Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Woundnot covered
  • A59374Billing and Coding: Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Woundnot covered

Alphabetic index entries that lead here

  • Occlusion, occluded›centric(of teeth)
  • Breathing›mouth›causing malocclusion
  • Malocclusion›due to›abnormal swallowing
  • Malocclusion›due to›mouth breathing
  • Malocclusion›due to›tongue, lip or finger habits
  • Anomaly, anomalous›dentofacial›functional›specified NEC

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under M26.5

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.