Q31.8 Other congenital malformations of larynx

The ICD-10-CM code for Other congenital malformations of larynx is Q31.8 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

17: Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0)

Section

Q30-Q34: Congenital malformations of the respiratory system (Q30-Q34)

Category Q31

8 codes (7 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to Q31.8:

• Accessory (congenital) › vocal cords
• Agenesis › glottis
• Absence (of) (organ or part) (complete or partial) › epiglottis, congenital
• Agenesis › cricoid cartilage
• Absence (of) (organ or part) (complete or partial) › glottis, congenital
• Absence (of) (organ or part) (complete or partial) › larynx (congenital)
• Absence (of) (organ or part) (complete or partial) › cricoid cartilage, congenital
• Agenesis › epiglottis

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

U.S. Hospital Utilization

• An estimated 1,370 U.S. inpatient stays in 2023 included Q31.8 among the documented diagnoses.
• 270 stays listed it as the principal diagnosis.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

Official Coding Guidelines

POA indicator for congenital conditions/anomalies and Q00-Q99 exception

Congenital conditions and anomalies Assign “Y” for congenital conditions and anomalies except for categories Q00- Q99, Congenital anomalies, which are on the exempt list. Congenital conditions are always considered present on admission.

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool
• AHRQ — HCUP National Inpatient Sample, Frequencies by Diagnosis Code (2016–2023)

Cite This Page

Reference Q31.8 with the canonical source and edition:

Q31.8 — Other congenital malformations of larynx. ICD-10 Coding Pro (ICD-10-CM FY2026). https://icd10codingpro.com/codes/Q31.8

Canonical URL: https://icd10codingpro.com/codes/Q31.8