2026 ICD-10-CM Diagnosis Code P83.4Breast engorgement of newborn

ICD-10-CM Codes›P00–P96›P80-P83›P83

ICD-10-CM P83.4
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

P83.4 is a billable ICD-10-CM diagnosis code for breast engorgement of newborn. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified perinatal conditions.

Code Identity

ICD-10-CM Code
P83.4
Billable Status
Yes — Valid for Submission
Code Describes
Breast engorgement of newborn
Short Description
Breast engorgement of newborn
Same as the full description in the CMS dataset.
Parent Code
P83
Other conditions of integument specific to newborn

Code Classification

ChapterP00–P96Certain conditions originating in the perinatal period
SectionP80-P83Conditions involving the integument and temperature regulation of newborn
CategoryP83Other conditions of integument specific to newborn
This CodeP83.4Breast engorgement of newborn

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Breast engorgement in newborn
  • Breast lobule hyperplasia
  • Engorgement of breasts
  • Gynecomastia
  • Hypertrophy of breast
  • Hypertrophy of gland of Montgomery
  • Idiopathic gynecomastia
  • Large breast
  • Neonatal mastitis
  • Noninfective mastitis of newborn
  • Size of breast - finding

Tabular List NotesGuidance

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

Inclusion Terms

  • Noninfective mastitis of newborn

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.

    • Engorgement
      • breast
        • newborn
    • Hypertrophy, hypertrophic
      • breast
        • newborn
    • Mastitis(acute) (diffuse) (nonpuerperal) (subacute)
      • neonatal (noninfective)
    • Newborn(infant) (liveborn) (singleton)
      • breast engorgement
    • Newborn(infant) (liveborn) (singleton)
      • mastitis
        • noninfective

Clinical ClassificationClinical

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

CCSR PNL013
Other specified and unspecified perinatal conditions
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Gynecomastia

    enlargement of the breast in the males, caused by an excess of estrogens. physiological gynecomastia is normally observed in newborns; adolescent; and aging males.

  • Gynecomastia, CTCAE|Gynecomastia|Gynecomastia|Gynecomastia (Priority 2)|Gynecomastia, CTCAE 5.0

    a disorder characterized by excessive development of the breasts in males.

  • 17-Beta-Hydroxysteroid Dehydrogenase 3 Deficiency|17 Beta HSD3 Deficiency|17 beta HSD3 Deficiency|Pseudohermaphroditism, Male, with Gynecomastia

    decreased activity of the steroidogenic enzyme, 17-beta-hydroxysteroid dehydrogenase, associated with mutation(s) in the hsd17b3 gene, leading to reduced testosterone production.

  • Grade 1 Gynecomastia, CTCAE|Grade 1 Gynecomastia

    asymptomatic

  • Grade 2 Gynecomastia, CTCAE|Grade 2 Gynecomastia|Grade 2 Gynecomastia

    symptomatic (e.g., pain or psychosocial impact)

  • Grade 3 Gynecomastia, CTCAE|Grade 3 Gynecomastia|Grade 3 Gynecomastia

    severe symptoms; elective operative intervention indicated

  • Gynecomastia

    a non-neoplastic focal or diffuse proliferation of glandular tissue of breast in males.

  • Gynecomastia, CTCAE 5.0|Gynecomastia|Gynecomastia|Gynecomastia (Priority 2)

    a disorder characterized by excessive development of the breasts in males.

  • Pathological Gynecomastia

    gynecomastia that is due to exogenous substances or disease processes.

  • Pubertal Gynecomastia|Transient Gynecomastia|Transient Gynecomastia

    gynecomastia that occurs during puberty and is not due to exogenous substances or disease processes.

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 P83.4 to ICD-9-CMHistory

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

ICD-9-CM
778.7 NB breast engorgement
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 P83.4Overview

Is P83.4 (Other conditions of integument specific to newborn) a billable code?

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

What is the ICD-9 equivalent of P83.4?

Under the General Equivalence Mappings, breast engorgement of newborn converts to ICD-9-CM 778.7 (NB breast engorgement). The mapping is a direct match.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.