ICD-10-CM 2027
ICD-10 code for laryngomalacia
From the official ICD-10-CM alphabetic index entry “Laryngomalacia (congenital)”. Page updated September 29, 2026.
About coding laryngomalacia
The ICD-10-CM code for laryngomalacia is Q31.5 (Congenital laryngomalacia).
Within Q31 (congenital malformations of larynx), Q31.5 is specifically for congenital laryngomalacia. Related codes cover web of larynx (Q31.0), congenital subglottic stenosis (Q31.1), laryngeal hypoplasia (Q31.2), Laryngocele (Q31.3), other congenital malformations of larynx (Q31.8) and congenital malformation of larynx, unspecified (Q31.9).
As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.
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 154 (Other Ear, Nose, Mouth and Throat Diagnoses with MCC, relative weight 1.5921), DRG 155 (Other Ear, Nose, Mouth and Throat Diagnoses with CC, relative weight 0.9322) and DRG 156 (Other Ear, Nose, Mouth and Throat Diagnoses without CC/MCC, relative weight 0.6659), 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.
Common questions about laryngomalacia ICD-10 codes
What is the ICD-10 code for laryngomalacia?
- Q31.5 — Congenital laryngomalacia.
Is Q31.5 billable?
- Yes. Q31.5 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Q31.5 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict Q31.5 as a principal diagnosis.
Is Q31.5 a CC or MCC?
- Q31.5 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.