Q31.8 ICD-10-CA code: Other congenital malformations of larynx
Q31.8 is the ICD-10-CA code for “Other congenital malformations of larynx” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.
Official description
Q31.8Other congenital malformations of larynx
ICD-10-CA · Canada · Also written Q318
Index terms
Entries in CIHI’s alphabetical index that lead to Q31.8. Searching the index by the condition the note names is how coders reach this code.
- Agenesis, larynx
- Agenesis, glottis
- Agenesis, epiglottis
- Atresia, atretic, larynx
- Agenesis, cricoid cartilage
- Malposition, congenital, larynx
- Constriction, larynx, congenital
- Malposition, congenital, glottis
- Stricture, larynx, congenital NEC
- Deformity, epiglottis (congenital)
- Accessory (congenital), vocal cords
- Malposition, congenital, epiglottis
- Agenesis, thyroid (gland), cartilage
- Cleft (congenital), thyroid cartilage
- Fissure, fissured, larynx, congenital
- Deformity, larynx (muscle) (congenital)
- Imperfect, closure (congenital), larynx
- Imperfect, closure (congenital), glottis
- Deformity, cricoid cartilage (congenital)
- Fissure, fissured, epiglottis (congenital)
- Stenosis (cicatricial), larynx, congenital NEC
- Constriction, larynx, congenital, specified NEC
- Cleft (congenital), cricoid cartilage, posterior
- Deformity, thyroid (gland) (congenital), cartilage
- Imperfect, closure (congenital), cricoid cartilage
- Anomaly, anomalous (congenital) (unspecified type), glottis
- Elongated, elongation (congenital), petiolus (epiglottidis)
- Malposition, congenital, thyroid (gland) (tissue), cartilage
- Obstruction, obstructed, obstructive, larynx NEC, congenital
- Anomaly, anomalous (congenital) (unspecified type), epiglottis
- Anomaly, anomalous (congenital) (unspecified type), valleculae
- Absence (organ or part) (complete or partial), glottis, congenital
- Absence (organ or part) (complete or partial), larynx (congenital)
- Cyst (colloid) (mucous) (retention) (simple), congenital NEC, larynx
- Absence (organ or part) (complete or partial), epiglottis, congenital
- Anomaly, anomalous (congenital) (unspecified type), cricoid cartilage
- Cyst (colloid) (mucous) (retention) (simple), congenital NEC, epiglottis
- Absence (organ or part) (complete or partial), cricoid cartilage, congenital
- Anomaly, anomalous (congenital) (unspecified type), aryteno epiglottic folds
- Anomaly, anomalous (congenital) (unspecified type), thyroid (gland), cartilage
- Anomaly, anomalous (congenital) (unspecified type), union, trachea with larynx
- Anomaly, anomalous (congenital) (unspecified type), union, thyroid cartilage and hyoid bone
- Absence (organ or part) (complete or partial), thyroid (gland) (acquired), cartilage, congenital
- Anomaly, anomalous (congenital) (unspecified type), union, cricoid cartilage and thyroid cartilage
Notes for Q31.8
As CIHI prints them, with any note Q31.8 takes from the headings above it.
Includes
- Absence, Agenesis, Atresia of cricoid cartilage, epiglottis, glottis, larynx or thyroid cartilageCleft thyroid cartilageCongenital stenosis of larynx NECFissure of epiglottisPosterior cleft of cricoid cartilage
Excludes
Conditions classified elsewhere.
- Congenital laryngeal stridor NOS (P28.8)From Q31 Congenital malformations of larynx
- Inborn errors of metabolism (E70-E90)From Chapter 17: Congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
Where Q31.8 sits
- 1ChapterChapter 17: Congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
- 2Block Q30-Q34Congenital malformations of the respiratory system
- 3Category Q31Congenital malformations of larynx
- 4Valid code Q31.8Other congenital malformations of larynx
Source and release
- Data release
- ICD-10-CA · FY 2026–2027
- Effective date
- Apr 1, 2026
- Publisher
- CIHI
This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.
Frequently asked questions
What does ICD-10-CA code Q31.8 mean?
Q31.8 is the ICD-10-CA code for “Other congenital malformations of larynx” in CIHI’s ICD-10-CA FY 2026–2027 release.
Where is Q31.8 in ICD-10-CA?
Q31.8 sits under Q31 Congenital malformations of larynx, within Q30-Q34 Congenital malformations of the respiratory system, within Chapter 17: Congenital malformations, deformations and chromosomal abnormalities (Q00-Q99).
What coding notes apply to Q31.8?
ICD-10-CA lists Includes, Excludes notes for Q31.8, including those from the headings it sits under. They are listed on this page with where each one comes from.
Which ICD-10-CA release does this page use?
It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.