2026 ICD-10-CM Diagnosis Code Q17.0Accessory auricle

ICD-10-CM Codes›Q00-Q99›Q10-Q18›Q17

ICD-10-CM Q17.0
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Q17.0 is a billable ICD-10-CM diagnosis code for accessory auricle. 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 Congenital malformations of eye, ear, face, neck.

Code Identity

ICD-10-CM Code
Q17.0
Billable Status
Yes — Valid for Submission
Code Describes
Accessory auricle
Short Description
Accessory auricle
Same as the full description in the CMS dataset.
Parent Code
Q17
Other congenital malformations of ear

Code Classification

ChapterQ00-Q99Congenital malformations, deformations and chromosomal abnormalities
SectionQ10-Q18Congenital malformations of eye, ear, face and neck
CategoryQ17Other congenital malformations of ear
This CodeQ17.0Accessory auricle

Present on Admission (POA)Billing

Q17.0 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.

  • Accessory auricle of bilateral ears
  • Accessory auricle of left ear
  • Accessory auricle of right ear
  • Accessory breast
  • Accessory nipple
  • Accessory tragus
  • Bilateral congenital malformation of external ears
  • Choristoma of eye proper
  • Congenital anomaly of lobe of ear
  • Congenital hypoplasia of cerebral hemisphere
  • Congenital hypoplasia of cerebral white matter
  • Developmental malformation of branchial arch
  • Epibulbar lipodermoid, preauricular appendage, polythelia syndrome
  • Hypoplasia of corpus callosum
  • Intellectual disability, hypoplastic corpus callosum, preauricular tag syndrome
  • Macrostomia, preauricular tag, external ophthalmoplegia syndrome
  • Mass of preauricular region
  • Polyotia
  • Supernumerary ear lobule

Tabular List NotesGuidance

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

Inclusion Terms

  • Accessory tragus
  • Polyotia
  • Preauricular appendage or tag
  • Supernumerary ear
  • Supernumerary lobule

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.

    • Accessory(congenital)
      • auricle (ear)
    • Accessory(congenital)
      • ear (auricle) (lobe)
    • Accessory(congenital)
      • lobule (ear)
    • Accessory(congenital)
      • preauricular appendage
    • Accessory(congenital)
      • tragus
    • Appendage
      • preauricular
    • Malformation(congenital)
      • ear
        • external
          • accessory auricle
    • Polyotia
    • Preauricular appendage or tag
    • Supernumerary(congenital)
      • ear (lobule)
    • Supernumerary(congenital)
      • lobule (ear)
    • Tag(hypertrophied skin) (infected)
      • preauricular
    • Tag(hypertrophied skin) (infected)
      • skin
        • preauricular

Clinical ClassificationClinical

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

CCSR MAL005
Congenital malformations of eye, ear, face, neck
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Craniofacial Abnormalities

Craniofacial is a medical term that relates to the bones of the skull and face. Craniofacial abnormalities are birth defects of the face or head. Some, like cleft lip and palate, are among the most common of all birth defects. Others are very rare. Most of them affect how a person's face or head looks.

Read the full article at MedlinePlus

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

Convert Q17.0 to ICD-9-CMHistory

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

ICD-9-CM
744.1 Accessory auricle
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 Q17.0Overview

Is Q17.0 (Other congenital malformations of ear) a billable code?

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

What MS-DRG does Q17.0 group to?

When accessory auricle 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 Q17.0 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 accessory auricle on inpatient claims.

What is the ICD-9 equivalent of Q17.0?

Under the General Equivalence Mappings, accessory auricle converts to ICD-9-CM 744.1 (accessory auricle). 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.