ICD-10-CM Code P39.0

Neonatal infective mastitis

Version 2020 Billable Code

Valid for Submission

P39.0 is a billable code used to specify a medical diagnosis of neonatal infective mastitis. The code is valid for the year 2020 for the submission of HIPAA-covered transactions. The ICD-10-CM code P39.0 might also be used to specify conditions or terms like abscess of breast, abscess of chest wall, abscess of nipple, abscess of skin of breast, actinobacillary mastitis, actinobacillus infection, etc

Short Description:Neonatal infective mastitis
Long Description:Neonatal infective mastitis

Tabular List of Diseases and Injuries

The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code P39.0:

Type 1 Excludes

Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • breast engorgement of newborn P83.4
  • noninfective mastitis of newborn P83.4

Index to Diseases and Injuries

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code P39.0 are found in the index:


The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Abscess of breast
  • Abscess of chest wall
  • Abscess of nipple
  • Abscess of skin of breast
  • Actinobacillary mastitis
  • Actinobacillus infection
  • Acute abscess of areola
  • Acute abscess of breast
  • Acute mastitis
  • Arcanobacterial mastitis
  • Breast infection
  • Carbuncle of breast
  • Carbuncle of chest wall
  • Cellulitis and abscess of breast
  • Cellulitis and abscess of trunk
  • Cellulitis of breast
  • Coliform mastitis
  • Corynebacterial mastitis
  • Furuncle of breast
  • Furuncle of chest wall
  • Furuncle of pectoral region
  • Infection due to Arcanobacterium pyogenes
  • Infection due to diphtheroid bacteria
  • Infective mastitis
  • Intramammary breast abscess
  • Mammary fistula
  • Mycoplasma mastitis
  • Neonatal breast abscess
  • Neonatal infective mastitis
  • Neonatal mastitis
  • Neonatal mastitis
  • Nonpuerperal abscess of areola
  • Nonpuerperal abscess of breast
  • Nonpuerperal abscess of left breast
  • Nonpuerperal abscess of right breast
  • Nonpuerperal mastitis
  • Nonpuerperal mastitis
  • Nonpuerperal mastitis of left breast
  • Nonpuerperal mastitis of right breast
  • Pseudomonas aeruginosa mastitis
  • Retromammary breast abscess
  • Staphylococcal mastitis
  • Streptococcal mastitis
  • Subareolar breast abscess
  • Subareolar mastitis

Convert P39.0 to ICD-9

  • 771.5 - Neonatal infec mastitis

Code Classification

  • Certain conditions originating in the perinatal period (P00–P96)
    • Infections specific to the perinatal period (P35-P39)
      • Other infections specific to the perinatal period (P39)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020

Information for Patients

Uncommon Infant and Newborn Problems

It can be scary when your baby is sick, especially when it is not an everyday problem like a cold or a fever. You may not know whether the problem is serious or how to treat it. If you have concerns about your baby's health, call your health care provider right away.

Learning information about your baby's condition can help ease your worry. Do not be afraid to ask questions about your baby's care. By working together with your health care provider, you make sure that your baby gets the best care possible.

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