Q31 – Congenital malformations of larynx
ICD-10-CM 2027 diagnosis code · Congenital malformations of the respiratory system
ICD-10-CM code
Q31
- Code
Q31(claims format:Q31)- Description
- Congenital malformations of larynx
- Billable
- No – use a more specific code below
- 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
Billable codes under Q31
Q31 is a header code and cannot be used on claims. Choose the most specific code:
- Q31.0 – Web of larynxBillable
- Q31.1 – Congenital subglottic stenosisBillable
- Q31.2 – Laryngeal hypoplasiaBillable
- Q31.3 – LaryngoceleBillable
- Q31.5 – Congenital laryngomalaciaBillable
- Q31.8 – Other congenital malformations of larynxBillable
- Q31.9 – Congenital malformation of larynx, unspecifiedBillable
Notes for Q31
Excludes1 (not coded here):
- congenital laryngeal stridor NOS (P28.89)
Frequently asked questions
What is ICD-10 code Q31?
Q31 is the ICD-10-CM code for congenital malformations of larynx, in the block Q30-Q34 (Congenital malformations of the respiratory system).
Is Q31 a billable code?
No. Q31 is a header code with more specific child codes; report one of the billable codes listed above.
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.