2026 ICD-10-CM Diagnosis Code M27.2Inflammatory conditions of jaws

ICD-10-CM Codes›M00–M99›M26-M27›M27

ICD-10-CM M27.2
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

M27.2 is a billable ICD-10-CM diagnosis code for inflammatory conditions 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
M27.2
Billable Status
Yes — Valid for Submission
Code Describes
Inflammatory conditions of jaws
Short Description
Inflammatory conditions 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 CodeM27.2Inflammatory conditions of jaws

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Abscess of facial bone
  • Abscess of hard palate
  • Abscess of jaw
  • Abscess of mandible
  • Abscess of maxilla
  • Abscess of palate
  • Acute nonsuppurative osteitis of jaw
  • Acute osteitis of jaw
  • Acute osteomyelitis of facial bone
  • Acute osteomyelitis of jaw
  • Acute osteomyelitis of mandible
  • Acute osteomyelitis of maxilla
  • Acute periostitis of jaw
  • Alveolar periostitis
  • Chronic abscess of jaw
  • Chronic abscess of mandible
  • Chronic abscess of maxilla
  • Chronic nonsuppurative osteitis of jaw
  • Chronic ossifying alveolar periostitis
  • Chronic osteitis of jaw
  • Chronic osteomyelitis of facial bone
  • Chronic osteomyelitis of jaw
  • Chronic osteomyelitis of mandible
  • Chronic osteomyelitis of maxilla
  • Chronic periostitis of jaw
  • Dental sequestrum
  • Disorder of hematopoietic system in newborn
  • Giant cell hyaline angiopathy
  • Infection of tooth socket
  • Inflammation of stylomandibular ligament
  • Inflammatory disorder of jaw region
  • Necrosis of hard palate
  • Neonatal osteomyelitis of jaw
  • Nonsuppurative osteitis of jaw
  • Odontogenic infection of jaw
  • Osteomyelitis of jaw
  • Osteomyelitis of mandible
  • Osteomyelitis of maxilla
  • Osteonecrosis of jaw
  • Osteonecrosis of mandible
  • Osteoradionecrosis
  • Osteoradionecrosis of bone of skull
  • Osteoradionecrosis of facial bones
  • Osteoradionecrosis of jaw
  • Osteoradionecrosis of mandible
  • Osteoradionecrosis of maxilla
  • Periapical osteoperiostitis
  • Periostitis of jaw
  • Residual osteitis
  • Sequestrum of facial bones
  • Sequestrum of jaw bone
  • Sequestrum of maxilla
  • Sequestrum of permanent tooth bud due to and following dental trauma
  • Sequestrum of the mandible
  • Spontaneous lingual mandibular sequestrum
  • Suppurative osteomyelitis of jaw
  • Suppurative periostitis of jaw

Tabular List NotesGuidance

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

Inclusion Terms

  • Osteitis of jaw(s)
  • Osteomyelitis (neonatal) jaw(s)
  • Osteoradionecrosis jaw(s)
  • Periostitis jaw(s)
  • Sequestrum of jaw bone

Use Additional Code

Type 2 Excludes

  • osteonecrosis of jaw due to drug M87.180

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.

    • Abscess(connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)
      • bone (subperiosteal)
        • jaw (lower) (upper)
    • Abscess(connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)
      • jaw (bone) (lower) (upper)
    • Abscess(connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)
      • malar
    • Abscess(connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)
      • maxilla, maxillary
    • Abscess(connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)
      • palate (soft)
        • hard
    • Disease, diseased
      • Magitot's
    • Empyema(acute) (chest) (double) (pleura) (supradiaphragmatic) (thorax)
      • maxilla, maxillary
    • Infection, infected, infective(opportunistic)
      • jaw (bone) (lower) (upper)
    • Infection, infected, infective(opportunistic)
      • maxilla, maxillary
    • Inflammation, inflamed, inflammatory(with exudation)
      • jaw (acute) (bone) (chronic) (lower) (suppurative) (upper)
    • Inflammation, inflamed, inflammatory(with exudation)
      • maxilla, maxillary
    • Necrosis, necrotic(ischemic)
      • bone
        • jaw
    • Necrosis, necrotic(ischemic)
      • jaw
    • Osteitis
      • jaw (acute) (chronic) (lower) (suppurative) (upper)
    • Osteomyelitis(general) (infective) (localized) (neonatal) (purulent) (septic) (staphylococcal) (streptococcal) (suppurative) (with periostitis)
      • acute
        • hematogenous
          • mandible
    • Osteomyelitis(general) (infective) (localized) (neonatal) (purulent) (septic) (staphylococcal) (streptococcal) (suppurative) (with periostitis)
      • acute
        • mandible
    • Osteomyelitis(general) (infective) (localized) (neonatal) (purulent) (septic) (staphylococcal) (streptococcal) (suppurative) (with periostitis)
      • chronic (or old)
        • with draining sinus
          • mandible
    • Osteomyelitis(general) (infective) (localized) (neonatal) (purulent) (septic) (staphylococcal) (streptococcal) (suppurative) (with periostitis)
      • chronic (or old)
        • hematogenous NEC
          • mandible
    • Osteomyelitis(general) (infective) (localized) (neonatal) (purulent) (septic) (staphylococcal) (streptococcal) (suppurative) (with periostitis)
      • chronic (or old)
        • mandible
    • Osteomyelitis(general) (infective) (localized) (neonatal) (purulent) (septic) (staphylococcal) (streptococcal) (suppurative) (with periostitis)
      • jaw (acute) (chronic) (lower) (neonatal) (suppurative) (upper)
    • Osteomyelitis(general) (infective) (localized) (neonatal) (purulent) (septic) (staphylococcal) (streptococcal) (suppurative) (with periostitis)
      • specified type NEC
        • mandible
    • Osteomyelitis(general) (infective) (localized) (neonatal) (purulent) (septic) (staphylococcal) (streptococcal) (suppurative) (with periostitis)
      • subacute
        • mandible
    • Osteoradionecrosis, jaw(acute) (chronic) (lower) (suppurative) (upper)
    • Periostitis(albuminosa) (circumscribed) (diffuse) (infective) (monomelic)
      • jaw (lower) (upper)
    • Sequestrum
      • dental
    • Sequestrum
      • jaw bone
    • Suppuration, suppurative
      • maxilla, maxillary

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

Clinical InformationClinical

  • Osteoradionecrosis

    necrosis of bone following radiation injury.

  • Osteoradionecrosis

    necrosis of bone following exposure to a source of radiation.

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 M27.2 to ICD-9-CMHistory

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

ICD-9-CM
526.4 Inflammation of jaw
Approximate The match is approximate rather than exact.
ICD-9-CM
526.89 Jaw disease NEC
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 M27.2Overview

Is M27.2 (Other diseases of jaws) a billable code?

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

What MS-DRG does M27.2 group to?

When inflammatory conditions 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 M27.2?

Under the General Equivalence Mappings, inflammatory conditions of jaws converts to ICD-9-CM 526.4 (inflammation of jaw) and 526.89 (jaw disease NEC). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.