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ICD-10-CM 2027 diagnosis code

M27.2Inflammatory conditions of jaws

✓ Billable / specific

M27.2 is a valid, billable ICD-10-CM code for inflammatory conditions of jaws. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Looking up by condition? See ICD-10 code for Osteoradionecrosis.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About M27.2

M27.2 is the ICD-10-CM diagnosis code for inflammatory conditions of jaws. It belongs to category M27 (other diseases of jaws), block M26-M27 (dentofacial anomalies [including malocclusion] and other disorders of jaw) and chapter 13 (diseases of the musculoskeletal system and connective tissue). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within M27 (other diseases of jaws), M27.2 is specifically for inflammatory conditions of jaws. Related codes cover developmental disorders of jaws (M27.0), giant cell granuloma, central (M27.1), alveolitis of jaws (M27.3), other and unspecified cysts of jaw (M27.4), periradicular pathology associated with previous endodontic treatment (M27.5), endosseous dental implant failure (M27.6), other specified diseases of jaws (M27.8) and disease of jaws, unspecified (M27.9).

The conditions in its Excludes2 note aren't part of M27.2, but may be coded alongside it if the patient has both: osteonecrosis of jaw due to drug (M87.180).

Use an additional code (W88-W90, X39.0) to identify radiation, if radiation-induced.

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 011 (Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy with MCC, relative weight 5.6154), DRG 012 (Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy with CC, relative weight 4.381), DRG 013 (Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy without CC/MCC, relative weight 2.7307), DRG 157 (Dental and Oral Diseases with MCC, relative weight 1.809), DRG 158 (Dental and Oral Diseases with CC, relative weight 0.9366) and DRG 159 (Dental and Oral Diseases without CC/MCC, relative weight 0.6893), in Pre-MDC and MDC 03 (Diseases and Disorders of the Ear, Nose, Mouth and Throat), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 526.4 (inflammatory conditions of jaw) and 526.89 (other specified diseases of the jaws).

Coding notes

Applicable toConditions and synonyms classified to this code
  • Osteitis of jaw(s)
  • Osteomyelitis (neonatal) jaw(s)
  • Osteoradionecrosis jaw(s)
  • Periostitis jaw(s)
  • Sequestrum of jaw bone
Excludes2Not included here — may be reported together if both conditions exist
  • osteonecrosis of jaw due to drug (M87.180)
Use additional codeAdd a secondary code to fully describe the condition
  • code (W88-W90, X39.0) to identify radiation, if radiation-induced

Notes that apply from higher levels

Instructions written at a parent level also apply to M27.2.

Broader instructions also apply from M26-M27 Dentofacial anomalies [including malocclusion] and other disorders of jaw and Chapter 13: Diseases of the musculoskeletal system and connective tissue.

Alphabetic index entries

27 entries

Terms in the official ICD-10-CM index that lead to M27.2.

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

ICD-9-CM equivalent

Converter →
  • 526.4Inflammatory conditions of jawapproximate
  • 526.89Other specified diseases of the jawsapproximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about M27.2

Is M27.2 billable?

Yes. M27.2 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can M27.2 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict M27.2 as a principal diagnosis.

Is M27.2 a CC or MCC?

No. M27.2 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does M27.2 group to?

M27.2 is used in the MS-DRG v44.0 logic for MS-DRG 011 (Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy with MCC), MS-DRG 012 (Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy with CC), MS-DRG 013 (Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy without CC/MCC), MS-DRG 157 (Dental and Oral Diseases with MCC), MS-DRG 158 (Dental and Oral Diseases with CC) and MS-DRG 159 (Dental and Oral Diseases without CC/MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for M27.2?

The CMS General Equivalence Mappings map M27.2 to ICD-9-CM 526.4 and 526.89.