ICD-10-CM 2027
ICD-10 code for jaw disease
From the official ICD-10-CM alphabetic index entry “Disease, diseased › jaw”. Page updated September 29, 2026.
About coding jaw disease
The ICD-10-CM code for jaw disease is M27.9 (Disease of jaws, unspecified). The official index lists 2 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on M27.9.
Within M27, choose M27.9 (Disease of jaws, unspecified) only when documentation doesn't support a more specific option: developmental disorders of jaws (M27.0), giant cell granuloma, central (M27.1), inflammatory conditions of jaws (M27.2), 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) and other specified diseases of jaws (M27.8).
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.
More specific jaw disease codes (official index)
Common questions about jaw disease ICD-10 codes
What is the ICD-10 code for jaw disease?
- M27.9 — Disease of jaws, unspecified. More specific codes apply when the documentation supports them: M27.49, M27.8.
What is the ICD-10 code for fibrocystic jaw disease?
- M27.49 — Other cysts of jaw.
Is M27.9 billable?
- Yes. M27.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can M27.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict M27.9 as a principal diagnosis.
Is M27.9 a CC or MCC?
- No. M27.9 is neither a CC nor an MCC under MS-DRG v44.0.