2027 ICD-10-CM Diagnosis Code Q83.9Congenital malformation of breast, unspecified

ICD-10-CM Codes›Q00-Q99›Q80-Q89›Q83

ICD-10-CM Q83.9
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

Q83.9 is a billable ICD-10-CM diagnosis code for congenital malformation of breast, unspecified. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 600 through 601. The code is exempt from POA reporting. Coders also document this condition as congenital abnormality of nipple. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified congenital anomalies.

Code Identity

ICD-10-CM Code
Q83.9
Billable Status
Yes — Valid for Submission
Code Describes
Congenital malformation of breast, unspecified
Short Description
Congenital malformation of breast, unspecified
Same as the full description in the CMS dataset.
Parent Code
Q83
Congenital malformations of breast

Code Classification

ChapterQ00-Q99Congenital malformations, deformations and chromosomal abnormalities
SectionQ80-Q89Other congenital malformations
CategoryQ83Congenital malformations of breast
This CodeQ83.9Congenital malformation of breast, unspecified

Present on Admission (POA)Billing

Q83.9 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review the other POA exempt codes in Other congenital malformations (Q80-Q89).

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Congenital abnormality of nipple
  • Congenital absence of nipple
  • Congenital anomaly of breast
  • Congenital deformity of breast
  • Scalp, ear, nipple syndrome
  • Ulnar mammary syndrome

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to Q83.9: its own notes plus those printed at Q83 and Chapter 17. A note printed at a category, block or chapter applies to every code under it.

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Q83 Congenital malformations of breast applies to 6 codes
From Chapter 17 (Q00-QA1) Congenital malformations, deformations and chromosomal abnormalities applies to 900 codes
  • inborn errors of metabolism (E70-E88)

Notes

General instructions on how these codes are used.

From Chapter 17 (Q00-QA1) Congenital malformations, deformations and chromosomal abnormalities applies to 900 codes
  • Codes from this chapter are not for use on maternal records

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name Q83.9, its category, or a range that includes it.

Excludes1 1

These codes carry an Excludes1 note naming Q83.9: they are not reported together with it, unless the two conditions are unrelated.

  • P83 Other conditions of integument specific to newborn
    congenital malformations of skin and integument (Q80-Q84) names Q80-Q84, which includes this code

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

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

CCSR MAL010
Other specified and unspecified congenital anomalies
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Breast Diseases

Breast diseases include various conditions and changes in your breast. Most women experience breast changes at some time. Your age, hormone levels, and medicines you take may cause lumps, bumps, and discharges of fluids that are not breast milk.

The full article covers:

  • What are breast diseases?
  • What are the symptoms of breast disease?
  • How are breast diseases diagnosed?
  • What are the treatments for breast disease?

Read the full article at MedlinePlus

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

Convert Q83.9 to ICD-9-CMHistory

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

ICD-9-CM
757.6 Cong breast 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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About Q83.9Overview

What is the ICD-10 code for congenital malformation of breast, unspecified?

The ICD-10-CM code for congenital malformation of breast, unspecified is Q83.9 (sometimes written as Q839). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is Q83.9 (Congenital malformations of breast) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report congenital malformation of breast, unspecified on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does Q83.9 group to?

When congenital malformation of breast, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 600, 601, with relative weights from 0.6014 to 0.9971 depending on complications. Higher weights mean higher Medicare reimbursement.

Is Q83.9 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 congenital malformation of breast, unspecified on inpatient claims. The code appears in the Other congenital malformations (Q80-Q89) range of the CMS exempt list.

What is the ICD-9 equivalent of Q83.9?

Under the General Equivalence Mappings, congenital malformation of breast, unspecified converts to ICD-9-CM 757.6 (cong breast anomaly NEC). The mapping is approximate, so confirm the match fits the documentation.