K08 vs M26

K08 (Other disorders of teeth and supporting structures) compared with M26 (Dentofacial anomalies [including malocclusion]), from the official CMS tabular data. Both may be reported when both conditions are documented (Excludes2).

Can these codes be reported together?

Yes, when both are documented. K08 carries an Excludes2 note covering M26: “dentofacial anomalies [including malocclusion] (M26.-)”

Excludes2 marks distinct conditions — both may be reported when both are documented.

Side by side

	K08Other disorders of teeth and supporting structures	M26Dentofacial anomalies [including malocclusion]
Billing status	Non-billable header Report instead: K08.0, K08.101, K08.102, K08.103, K08.104	Non-billable header Report instead: M26.00, M26.01, M26.02, M26.03, M26.04
Classification	K00-K95 — Diseases of the Digestive System (K00-K95)	M00-M99 — Diseases of the Musculoskeletal System and Connective Tissue (M00-M99)
Definition	Other disorders of teeth and supporting structures is a non-billable ICD-10-CM category code (K08).	Dentofacial anomalies [including malocclusion] is a non-billable ICD-10-CM category code (M26).

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Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources