2026 ICD-10-CM Diagnosis Code M27.0Developmental disorders of jaws

ICD-10-CM Codes›M00–M99›M26-M27›M27

ICD-10-CM M27.0
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

M27.0 is a billable ICD-10-CM diagnosis code for developmental disorders of jaws. 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 Nontraumatic dental conditions.

Code Identity

ICD-10-CM Code
M27.0
Billable Status
Yes — Valid for Submission
Code Describes
Developmental disorders of jaws
Short Description
Developmental disorders of jaws
Same as the full description in the CMS dataset.
Parent Code
M27
Other diseases of jaws

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM26-M27Dentofacial anomalies [including malocclusion] and other disorders of jaw
CategoryM27Other diseases of jaws
This CodeM27.0Developmental disorders of jaws

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Congenital anomaly of jaw
  • Exostosis of jaw
  • Exostosis of skull
  • Latent bone cyst of jaw
  • Maxillary torus present
  • Segmental odontomaxillary dysplasia
  • Spindle torus
  • Stafne idiopathic bone cavity of mandible
  • Torus mandibularis
  • Torus palatinus

Tabular List NotesGuidance

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

Inclusion Terms

  • Latent bone cyst of jaw
  • Stafne's cyst
  • Torus mandibularis
  • Torus palatinus

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.

    • Cyst(colloid) (mucous) (simple) (retention)
      • bone (local) NEC
        • specified type NEC
          • jaw
            • latent
    • Cyst(colloid) (mucous) (simple) (retention)
      • Stafne's
    • Disorder(of)
      • jaw, developmental
    • Stafne's cyst or cavity
    • Torus(mandibularis) (palatinus)

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 DEN002
Nontraumatic dental conditions
Default principal diagnosis: inpatient No · outpatient No

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 M27.0 to ICD-9-CMHistory

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

ICD-9-CM
526.9 Jaw disease NOS
Approximate The match is approximate rather than exact.

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 M27.0Overview

Is M27.0 (Other diseases of jaws) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report developmental disorders of jaws on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does M27.0 group to?

When developmental disorders of jaws 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 M27.0?

Under the General Equivalence Mappings, developmental disorders of jaws converts to ICD-9-CM 526.9 (jaw disease NOS). The mapping is approximate, so confirm the match fits the documentation.

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.