Q31Not billable, use a more specific code below

Congenital malformations of larynx

In Congenital malformations of the respiratory system (Q30-Q34), chapter 17: Congenital Malformations, Deformations and Chromosomal Abnormalities

7 billable codes under Q31: 6 are a CC; none map to an HCC.A CC or MCC (major CC) is a secondary diagnosis that raises the MS-DRG payment.

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Instructional notes

Excludes1: not coded here, use a different code

  • congenital laryngeal stridor NOS (P28.89)

Official coding guidelines

From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.

Assign Q00-QA1 codes for documented congenital anomalies or genetic disorders at any age, coding non-inherent manifestations separately and sequencing Z38 first on the birth admission.

Read Section I.C.17 (page 74)

Q31 MS-DRGs

This code does not group to an MS-DRG as a principal diagnosis.

Other codes that refer to Q31

Notes on these codes point to Q31.

  • Q10-Q18 Excludes2: congenital malformation of larynx (Q31.-)

About the condition

Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.

Birth Defects

A birth defect is a problem that happens while a baby is developing in the mother's body. Most birth defects happen during the first 3 months of pregnancy. One out of every 33 babies in the United States is born with a birth defect.

Read more about birth defects on MedlinePlus

Throat Disorders

Your throat is a tube that carries food to your esophagus and air to your windpipe and larynx. The technical name for your throat is the pharynx. Throat problems are common. You've probably had a sore throat. The cause is usually a viral infection, but other causes include allergies, infection with strep bacteria or the leaking of stomach acids back up into the esophagus, called GERD.

Read more about throat disorders on MedlinePlus

Code history

Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.