Q31.8 – Other congenital malformations of larynx
ICD-10-CM 2027 diagnosis code · Congenital malformations of the respiratory system
ICD-10-CM code
Q31.8
- Code
Q31.8(claims format:Q318)- Description
- Other congenital malformations of larynx
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 17. Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA1)
- Block
- Q30-Q34 Congenital malformations of the respiratory system
- Parent codes
- Q31
Notes for Q31.8
Applicable to:
- 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
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
Q31 – Congenital malformations of larynx
Excludes1 (not coded here):
- congenital laryngeal stridor NOS (P28.89)
Index terms for Q31.8
Entries in the ICD-10-CM alphabetic index that lead to this code:
- Absence, larynx
- Agenesis, larynx
- Agenesis, glottis
- Deformity, larynx
- Agenesis, epiglottis
- Deformity, epiglottis
- Accessory, vocal cords
- Cleft, thyroid cartilage
- Atresia, atretic, larynx
- Atresia, atretic, glottis
- Imperfect, closure, larynx
- Laryngofissure, congenital
- Imperfect, closure, glottis
- Anomaly, anomalous, glottis
- Agenesis, cricoid cartilage
- Cyst, congenital NEC, larynx
- Atresia, atretic, epiglottis
- Deformity, cricoid cartilage
- Agenesis, thyroid, cartilage
- Absence, glottis, congenital
- Deformity, thyroid, cartilage
- Fissure, fissured, epiglottis
- Anomaly, anomalous, valleculae
- Anomaly, anomalous, epiglottis
- Elongated, elongation, petiolus
Related codes in Q31
Frequently asked questions
What is ICD-10 code Q31.8?
Q31.8 is the ICD-10-CM code for other congenital malformations of larynx, in the block Q30-Q34 (Congenital malformations of the respiratory system).
Is Q31.8 a billable code?
Yes. Q31.8 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does Q31.8 belong to?
It belongs to category Q31 – Congenital malformations of larynx.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.