Q31.1 Congenital subglottic stenosis

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis. Exempt from present-on-admission (POA) reporting.

Applies from Q31 Congenital malformations of larynx

Excludes1 (never code together)

• congenital laryngeal stridor NOS (P28.89)

MS-DRG index

Defines the logic of DRG(s) 011-013 in MDC PRE.

Approximate ICD-9-CM (GEMs)

• 748.3 Other anomalies of larynx, trachea, and bronchus (approximate)

Code annotations containing back-references to Q31.1

Back-references to Q31

• Code Also: P28 Other respiratory conditions originating in the perinatal period (", if applicable, congenital malformations of the respiratory system (Q30-Q34)")

Diagnosis Index entries for Q31.1

• Constriction › larynx › congenital › subglottic
• Stenosis, stenotic (cicatricial) › larynx › congenital NEC › subglottic
• Stenosis, stenotic (cicatricial) › subglottic › congenital
• Stricture › larynx › congenital NEC › subglottic

Nearby codes

• Q31 Congenital malformations of larynx
• Q31.0 Web of larynx
• Q31.1 Congenital subglottic stenosis (this code)
• Q31.2 Laryngeal hypoplasia
• Q31.3 Laryngocele
• Q31.5 Congenital laryngomalacia
• Q31.8 Other congenital malformations of larynx
• Q31.9 Congenital malformation of larynx, unspecified