2026 ICD-10-CM Diagnosis Code Q30.0Choanal atresia

ICD-10-CM Codes›Q00-Q99›Q30-Q34›Q30

ICD-10-CM Q30.0
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Q30.0 is a billable ICD-10-CM diagnosis code for choanal atresia. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 154 through 156. The code is exempt from POA reporting. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Respiratory congenital malformations.

Code Identity

ICD-10-CM Code
Q30.0
Billable Status
Yes — Valid for Submission
Code Describes
Choanal atresia
Short Description
Choanal atresia
Same as the full description in the CMS dataset.
Parent Code
Q30
Congenital malformations of nose

Code Classification

ChapterQ00-Q99Congenital malformations, deformations and chromosomal abnormalities
SectionQ30-Q34Congenital malformations of the respiratory system
CategoryQ30Congenital malformations of nose
This CodeQ30.0Choanal atresia

Present on Admission (POA)Billing

Q30.0 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Bilateral choanal atresia
  • Choanal atresia
  • Choanal atresia with radial ray hypoplasia
  • Choanal atresia, athelia, hypothyroidism, delayed puberty, short stature syndrome
  • Choanal atresia, hearing loss, cardiac defect, craniofacial dysmorphism syndrome
  • Choanal stenosis
  • Chronic diarrhea of infants AND/OR young children
  • Congenital atresia of anterior naris
  • Congenital atresia of bilateral anterior nares
  • Congenital atresia of left anterior naris
  • Congenital atresia of nares
  • Congenital atresia of right anterior naris
  • Congenital deformity of nose
  • Congenital stenosis of choanae
  • Congenital stenosis of nares
  • Congenital stenosis of the anterior nares
  • Developmental malformation of branchial arch
  • Ear, face and neck congenital anomalies
  • Intractable diarrhea with choanal atresia and eye anomaly syndrome
  • Lymphedema of lower extremity
  • Lymphedema, posterior choanal atresia syndrome
  • Stenosis of nostril
  • X-linked female restricted facial dysmorphism, short stature, choanal atresia, intellectual disability

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Atresia of nares (anterior) (posterior)
  • Congenital stenosis of nares (anterior) (posterior)

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Atresia, atretic
      • choana
    • Atresia, atretic
      • nares (anterior) (posterior)
    • Atresia, atretic
      • nose, nostril
    • Closure
      • congenital, nose
    • Closure
      • nose (congenital)
    • Fusion, fused(congenital)
      • choanal
    • Fusion, fused(congenital)
      • nares, nose, nasal, nostril (s)
    • Occlusion, occluded
      • choanal
    • Occlusion, occluded
      • nose
        • congenital
    • Stenosis, stenotic(cicatricial)
      • nares (anterior) (posterior)
        • congenital
    • Stricture
      • nares (anterior) (posterior)
        • congenital
    • Stricture
      • nose
        • congenital
    • Stricture
      • nostril (anterior) (posterior)
        • congenital

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR MAL007
Respiratory congenital malformations
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Choanal Atresia

    a congenital abnormality that is characterized by a blocked choanae, the opening between the nose and the nasopharynx. blockage can be unilateral or bilateral; bony or membranous.

  • Congenital Deformity of Nose

    a malformation of the nose that is present at birth.

Patient EducationClinical

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.

The full article covers:

  • What are birth defects?
  • What causes birth defects?
  • Who is at risk of having a baby with birth defects?
  • How are birth defects diagnosed?
  • What are the treatments for birth defects?
  • Can birth defects be prevented?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert Q30.0 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
748.0 Choanal atresia
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About Q30.0Overview

Is Q30.0 (Congenital malformations of nose) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report choanal atresia on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does Q30.0 group to?

When choanal atresia is the principal diagnosis on an inpatient stay, it groups to MS-DRG 154, 155, 156, with relative weights from 0.6911 to 1.5635 depending on complications. Higher weights mean higher Medicare reimbursement.

Is Q30.0 exempt from POA reporting?

Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for choanal atresia on inpatient claims.

What is the ICD-9 equivalent of Q30.0?

Under the General Equivalence Mappings, choanal atresia converts to ICD-9-CM 748.0 (choanal atresia). The mapping is a direct match.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.