2026 ICD-10-CM Diagnosis Code Q30.1Agenesis and underdevelopment of nose

ICD-10-CM Codes›Q00-Q99›Q30-Q34›Q30

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

Q30.1 is a billable ICD-10-CM diagnosis code for agenesis and underdevelopment of nose. 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
Q30.1
Billable Status
Yes — Valid for Submission
Code Describes
Agenesis and underdevelopment of nose
Short Description
Agenesis and underdevelopment of nose
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 CodeQ30.1Agenesis and underdevelopment of nose

Present on Admission (POA)Billing

Q30.1 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.

  • Congenital absence of nasal turbinate
  • Congenital absence of nose
  • Congenital anomaly of nasal bone
  • Congenital anomaly of nasal turbinate
  • Congenital cleft nose
  • Congenital deformity of nose
  • Congenital hypoplasia of apex of nose
  • Congenital hypoplasia of bridge of nose
  • Congenital hypoplasia of nasal bone
  • Congenital hypoplasia of nasal septum
  • Congenital hypoplasia of nasal turbinate
  • Congenital hypoplasia of nose
  • Hypoplasia and coloboma of alar cartilage with telecanthus syndrome
  • Hypoplasia of eye
  • Hyposmia, nasal and ocular hypoplasia, hypogonadotropic hypogonadism syndrome
  • Telecanthus
  • Underdevelopment of nose

Tabular List NotesGuidance

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

Inclusion Terms

  • Congenital absent of nose

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.

    • Absence(of) (organ or part) (complete or partial)
      • nose (congenital)
    • Agenesis
      • nose
    • Hypoplasia, hypoplastic
      • nose, nasal
    • Underdevelopment
      • nose

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

  • 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 Q30.1 to ICD-9-CMHistory

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

ICD-9-CM
748.1 Nose anomaly NEC
Approximate The match is approximate rather than exact.

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 Q30.1Overview

Is Q30.1 (Congenital malformations of nose) a billable code?

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

What MS-DRG does Q30.1 group to?

When agenesis and underdevelopment of nose 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 Q30.1 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 agenesis and underdevelopment of nose on inpatient claims.

What is the ICD-9 equivalent of Q30.1?

Under the General Equivalence Mappings, agenesis and underdevelopment of nose converts to ICD-9-CM 748.1 (nose anomaly NEC). The mapping is approximate, so confirm the match fits the documentation.

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.