2026 ICD-10-CM Diagnosis Code M26.213Malocclusion, Angle's class III

ICD-10-CM Codes›M00–M99›M26-M27›M26

ICD-10-CM M26.213
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

M26.213 is a billable ICD-10-CM diagnosis code for malocclusion, Angle's class III. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 157 through 159. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Any dental condition including traumatic injury, Disorders of jaw, and Disorders of teeth and gingiva.

Code Identity

ICD-10-CM Code
M26.213
Billable Status
Yes — Valid for Submission
Code Describes
Malocclusion, Angle's class III
Short Description
Malocclusion, Angle's class III
Same as the full description in the CMS dataset.
Parent Code
M26.21
Malocclusion, Angle's class

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM26-M27Dentofacial anomalies [including malocclusion] and other disorders of jaw
CategoryM26Dentofacial anomalies [including malocclusion]
This CodeM26.213Malocclusion, Angle's class III

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Absence of teeth
  • Class III buccal segment relationship - half unit
  • Edentulous
  • Edentulous maxillomandibular relationship class III
  • Malocclusion cuspid class III
  • Malocclusion, Angle class III
  • Mesial step occlusion of primary dentition
  • Mesio-occlusion of teeth
  • Reduced overjet
  • Reverse overjet
  • Tooth absent

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Mesio-occlusion

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Malocclusion(teeth)
      • Angle's
        • class III
    • Mesio-occlusion

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR DEN001
Any dental condition including traumatic injury
Default principal diagnosis: inpatient No · outpatient No
CCSR MUS029
Disorders of jaw
Default principal diagnosis: inpatient Yes · outpatient Yes
CCSR DIG002
Disorders of teeth and gingiva
Default principal diagnosis: inpatient No · outpatient No
CCSR DEN002
Nontraumatic dental conditions
Default principal diagnosis: inpatient No · outpatient No

Clinical InformationClinical

  • Carcinoma in Situ of Gingiva and Edentulous Alveolar Ridge|Carcinoma in situ of gingiva and edentulous alveolar ridge

    evidence of carcinoma in situ of the gingiva and edentulous alveolar ridge.

  • Edentulous

    having teeth in neither the mandible nor the maxilla.

  • Edentulous

    an indication that an individual lacks teeth/dentition.

Patient EducationClinical

Jaw Injuries and Disorders

Your jaw is a set of bones that holds your teeth. It includes:

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert M26.213 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
524.23 Malocc-Angle's class III
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About M26.213Overview

Is M26.213 (Malocclusion, Angle's class) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report malocclusion, Angle's class III on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does M26.213 group to?

When malocclusion, Angle's class III is the principal diagnosis on an inpatient stay, it groups to MS-DRG 157, 158, 159, with relative weights from 0.7085 to 1.7168 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of M26.213?

Under the General Equivalence Mappings, malocclusion, Angle's class III converts to ICD-9-CM 524.23 (Malocc-Angle's class III). The mapping is a direct match.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.