ICD-10 Code for Malocclusion

Also indexed as (teeth)

The ICD-10-CM code for malocclusion is M26.4 — Malocclusion, unspecified. This is the code the Alphabetic Index gives for malocclusion with no further qualifier, valid for FY2027 (October 1, 2026 – September 30, 2027).

BillableUnspecified

M26.4 is billable but unspecified. If the documentation names a type, site or cause, one of the more specific codes below is likely expected.

Which malocclusion code should you use?

The Alphabetic Index lists 7 codes under Malocclusion. Which one applies depends on the qualifier documented in the record — the type, site, cause, or associated condition. Find the qualifier below, then verify the code in the Tabular List before using it.

By type

Angle's	M26.219	Malocclusion, Angle's class, unspecified
temporomandibular	M26.69	Other specified disorders of temporomandibular joint

Malocclusion Angle's

class I	M26.211	Malocclusion, Angle's class I
class II	M26.212	Malocclusion, Angle's class II
class III	M26.213	Malocclusion, Angle's class III

Malocclusion due to

abnormal swallowing	M26.59	Other dentofacial functional abnormalities
mouth breathing	M26.59	Other dentofacial functional abnormalities
tongue, lip or finger habits	M26.59	Other dentofacial functional abnormalities

Index terms and codes are reproduced from the official ICD-10-CM FY2027 release. The Alphabetic Index is a finding aid — a code must always be verified in the Tabular List before it is reported. Data sources