Q31.8

Other congenital malformations of larynx

Billable FY2026 2025-10-01 → 2026-09-30

Exclusions 1 never code together

Q31code

Excludes1

congenital laryngeal stridor NOS (P28.89)P28.89

Excludes1 — never code together. The excluded condition and this one are mutually exclusive.

Instructional notes 7

Q31.8code

Inclusion terms

Absence of larynx
Agenesis of larynx
Atresia of larynx
Congenital cleft thyroid cartilage
Congenital fissure of epiglottis
Congenital stenosis of larynx NEC
Posterior cleft of cricoid cartilage

Index entries leading here 17

Absence (of) (organ or part) (complete or partial)
- epiglottis, congenital Q31.8
- glottis, congenital Q31.8
- larynx (congenital) Q31.8
- thyroid (gland) (acquired) E89.0
  - cartilage, congenital Q31.8
- cricoid cartilage, congenital Q31.8
Accessory (congenital)
- vocal cords Q31.8
Agenesis
- cricoid cartilage Q31.8
- epiglottis Q31.8
- glottis Q31.8
- larynx Q31.8
- thyroid (gland) E03.1
  - cartilage Q31.8
Anomaly, anomalous (congenital) (unspecified type) Q89.9
- aryteno-epiglottic folds Q31.8
- cricoid cartilage Q31.8
- epiglottis Q31.8
- glottis Q31.8
- thyroid (gland) Q89.2
  - cartilage Q31.8
- union
  - cricoid cartilage and thyroid cartilage Q31.8
  - thyroid cartilage and hyoid bone Q31.8
  - trachea with larynx Q31.8
- valleculae Q31.8
Atresia, atretic
- thyroid cartilage Q31.8
- cricoid cartilage Q31.8
- epiglottis Q31.8
- glottis Q31.8
- larynx Q31.8
Deformity Q89.9
- thyroid (gland) (congenital) Q89.2
  - cartilage Q31.8
- cricoid cartilage (congenital) Q31.8
- larynx (muscle) (congenital) Q31.8
- epiglottis (congenital) Q31.8
Malposition
- congenital
  - thyroid (gland) (tissue) Q89.2
    - cartilage Q31.8
  - epiglottis Q31.8
  - glottis Q31.8
  - larynx Q31.8
Cleft (congenital) — see also Imperfect, closure
- thyroid cartilage Q31.8
- cricoid cartilage, posterior Q31.8
Imperfect
- closure (congenital)
  - cricoid cartilage Q31.8
  - larynx Q31.8
  - glottis Q31.8
Fissure, fissured
- larynx J38.7
  - congenital Q31.8
- epiglottis (congenital) Q31.8
Constriction — see also Stricture
- larynx J38.6
  - congenital Q31.8
    - specified NEC Q31.8
Laryngofissure J38.7
- congenital Q31.8
Obstruction, obstructed, obstructive
- larynx NEC J38.6
  - congenital Q31.8
Cyst (colloid) (mucous) (simple) (retention)
- congenital NEC Q89.89
  - larynx Q31.8
  - epiglottis Q31.8
Stenosis, stenotic (cicatricial) — see also Stricture
- larynx J38.6
  - congenital NEC Q31.8
Stricture — see also Stenosis
- larynx J38.6
  - congenital NEC Q31.8
Elongated, elongation (congenital) — see also Distortion
- petiolus (epiglottidis) Q31.8

Alongside this code 6 same parent — Q31

Q31.0 Web of larynx Q31.1 Congenital subglottic stenosis Q31.2 Laryngeal hypoplasia Q31.3 Laryngocele Q31.5 Congenital laryngomalacia Q31.9 Congenital malformation of larynx, unspecified

Additional references

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Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.

Risk adjustment

Maps to no condition category in any loaded model.

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This code

Billable: yes
Code set: FY2026
Parent: Q31
Block: Q30-Q34
Siblings: 6

Present FY2024–FY2027.