ICD-10-CM 2027
ICD-10 code for maxillary hypoplasia
From the official ICD-10-CM alphabetic index entry “Hypoplasia, hypoplastic › maxillary”. Page updated September 29, 2026.
About coding maxillary hypoplasia
The ICD-10-CM code for maxillary hypoplasia is M26.02 (Maxillary hypoplasia). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on M26.02.
Within M26.0 (major anomalies of jaw size), M26.02 is specifically for maxillary hypoplasia. Related codes cover unspecified anomaly of jaw size (M26.00), maxillary hyperplasia (M26.01), mandibular hyperplasia (M26.03), mandibular hypoplasia (M26.04), macrogenia (M26.05), microgenia (M26.06), excessive tuberosity of jaw (M26.07) and other specified anomalies of jaw size (M26.09).
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 maxillary hypoplasia codes (official index)
- alveolar M26.73 — Alveolar maxillary hypoplasia
Common questions about maxillary hypoplasia ICD-10 codes
What is the ICD-10 code for maxillary hypoplasia?
- M26.02 — Maxillary hypoplasia. More specific codes apply when the documentation supports them: M26.73.
What is the ICD-10 code for alveolar maxillary hypoplasia?
- M26.73 — Alveolar maxillary hypoplasia.
Is M26.02 billable?
- Yes. M26.02 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can M26.02 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict M26.02 as a principal diagnosis.
Is M26.02 a CC or MCC?
- No. M26.02 is neither a CC nor an MCC under MS-DRG v44.0.