2026 ICD-10-CM Diagnosis Code P39.9Infection specific to the perinatal period, unspecified

ICD-10-CM Codes›P00–P96›P35-P39›P39

ICD-10-CM P39.9
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

P39.9 is a billable ICD-10-CM diagnosis code for infection specific to the perinatal period, unspecified. 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 Perinatal infections.

Code Identity

ICD-10-CM Code
P39.9
Billable Status
Yes — Valid for Submission
Code Describes
Infection specific to the perinatal period, unspecified
Short Description
Infection specific to the perinatal period, unspecified
Same as the full description in the CMS dataset.
Parent Code
P39
Other infections specific to the perinatal period

Code Classification

ChapterP00–P96Certain conditions originating in the perinatal period
SectionP35-P39Infections specific to the perinatal period
CategoryP39Other infections specific to the perinatal period
This CodeP39.9Infection specific to the perinatal period, unspecified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Abscess of ankle
  • Abscess of right foot
  • Abscess of tendon sheath of right ankle
  • Abscess of tendon sheath of right ankle and/or foot
  • Abscess of tendon sheath of right foot
  • Acoustic neuritis
  • Acoustic neuritis due to infectious disease
  • Acute endocarditis
  • Acute endocarditis of right side of heart due to infection
  • Acute infectious peritonitis
  • Acute infective endocarditis
  • Acute localized peritonitis caused by infection
  • Acute seizure due to infection of central nervous system
  • Acute urticaria
  • Acute urticaria due to infectious disease
  • Allantoic cyst
  • Azoospermia due to infectious disease
  • Bilateral acoustic neuritis due to infectious disease
  • Cauda equina syndrome due to infection
  • Cellulitis of elbow
  • Cellulitis of left elbow
  • Cellulitis of right elbow
  • Clinical infection
  • Clinical infection of newborn
  • Complication of transplanted liver
  • Congenital hypoplasia of adrenal gland
  • Congenital infectious disease
  • Congenital non-bacterial non-viral infection
  • Disease of presumed infectious origin
  • Disorder of autonomic nervous system due to infectious disease
  • Disorder of bilateral acoustic nerves
  • Early neonatal infection caused by Anaerobic bacterium
  • Early neonatal infection caused by bacterium
  • Early neonatal infection caused by Escherichia coli
  • Early neonatal infection caused by fungus
  • Early neonatal infection caused by Staphylococcus aureus
  • Early neonatal infection caused by Streptococcus group B
  • Early neonatal parasitic infection
  • Eosinophilia due to infectious disease
  • Epilepsy due to infectious disease of central nervous system
  • Epilepsy due to infectious encephalitis
  • Exacerbation of allergic asthma due to infection
  • Exacerbation of bronchiectasis caused by infection
  • Ex-vacuo hydrocephalus due to infection
  • Fever due to infection
  • Finding of contents of cervix
  • Glomerular disease due to infectious disease
  • Hydrocephalus ex vacuo
  • Immune dysregulation, inflammatory bowel disease, arthritis, recurrent infection syndrome
  • Infantile streptococcal infection
  • Infected seroma due to and following procedure
  • Infected urachal cyst
  • Infection after injection
  • Infection causing abscess of central nervous system
  • Infection causing cyst of central nervous system
  • Infection causing granuloma of central nervous system
  • Infection causing granuloma of extradural space of spinal cord
  • Infection causing granuloma of spinal cord
  • Infection causing inflammation of optic nerve
  • Infection causing multiple abscesses of brain
  • Infection causing myoendocarditis
  • Infection causing subacute endocarditis
  • Infection causing tic
  • Infection of bilateral eyes
  • Infection of biliary tract
  • Infection of deep tissue at puncture site due to and following peripheral nerve block
  • Infection of heart transplant
  • Infection of left eye
  • Infection of lip
  • Infection of liver transplant
  • Infection of phalanx of finger or thumb
  • Infection of puncture wound
  • Infection of right eye
  • Infection of uncertain etiology
  • Infection of urachal remnant
  • Infection of urachal sinus
  • Infection of vertebral internal fixation device
  • Infectious disease
  • Infectious edema
  • Infectious epithelial keratitis
  • Infectious intermediate uveitis
  • Infectious neuroretinitis
  • Infectious panuveitis
  • Injection site infection
  • Instability of spine due to infectious disorder
  • Intermediate uveitis
  • Invasive infectious disease
  • Keratitis caused by infection
  • Left acoustic neuritis due to infectious disease
  • Local infection of wound
  • Lyell syndrome
  • Lymphocyte count below reference range
  • Lymphocytopenia
  • Lymphopenia due to infection
  • Malformation of urachus
  • MIRAGE syndrome
  • Mixed infectious disease
  • Multi-organism infectious disease
  • Multiple abscesses
  • Named sign of foot
  • Neonatal colibacillosis
  • Neonatal hemolysis with systemic bacterial infection
  • Neonatal infectious disorder
  • Neonatal streptococcal infection
  • Neuroretinitis
  • Neutropenia associated with infectious disease
  • Organ surgical site infection
  • Osler's node of foot
  • Osler's node of hand
  • Osteomyelitis of finger of left hand
  • Osteomyelitis of finger of right hand
  • Osteomyelitis of left hand
  • Osteomyelitis of left humerus
  • Osteomyelitis of left pelvis
  • Osteomyelitis of right hand
  • Osteomyelitis of right humerus
  • Osteomyelitis of right pelvis
  • Perinatal infection of fetus and/or neonate
  • Perinatal staphylococcal infection
  • Perinatal streptococcal infection
  • Post procedure puncture site infection
  • Posterior uveitis due to infectious disease
  • Postoperative wound infection
  • Postoperative wound infection-deep
  • Post-traumatic wound infection
  • Pseudomonas pyocyaneus congenital infection
  • Pus at uterine os cervix
  • Right acoustic neuritis due to infectious disease
  • Right sided infective endocarditis
  • Secondary tic disorder
  • Seizures complicating infection
  • Seizures complicating infection in the newborn
  • Seroma
  • Seroma following procedure
  • Short stature co-occurrent and due to endocrine disorder
  • Situation-related seizures
  • Stevens-Johnson syndrome, toxic epidermal necrolysis spectrum
  • Streptococcus group B infection of the infant
  • Subacute endocarditis
  • Subacute endocarditis of right side of heart due to infection
  • Superficial puncture wound
  • Superficial soft tissue infection at site of neuraxial block
  • Superficial soft tissue infection at site of peripheral nerve block
  • Toxic epidermal necrolysis due to infection
  • Urachal sinus
  • Urticaria secondary to infection
  • Vomiting co-occurrent and due to infectious disease

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.

    • Infection, infected, infective(opportunistic)
      • congenital
    • Infection, infected, infective(opportunistic)
      • newborn
    • Infection, infected, infective(opportunistic)
      • perinatal period
    • Newborn(infant) (liveborn) (singleton)
      • infection

Clinical ClassificationClinical

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

CCSR PNL009
Perinatal infections
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Seroma

    tumor-like sterile accumulation of serum in a tissue, organ, or cavity. it results from a tissue insult and is the product of tissue inflammation. it most commonly occurs following mastectomy.

  • Mastectomy

    surgical procedure to remove one or both breasts.

  • Clinical Infection

    an infection that exhibits features or characteristics that exceed an agreed-upon threshold among subject matter experts, which warrants attention or treatment.

  • Infectious Disorder|Clinical Infection|ID|INFECTION|Infection|Infection|Infectious|Infectious Disease|Infectious Disease|Infectious Disease|Infectious Diseases and Manifestations|Unspecified Infection|infection

    a disorder resulting from the presence and activity of a microbial, viral, fungal, or parasitic agent. it can be transmitted by direct or indirect contact.

  • Subclinical Infection|Asymptomatic Infection|Inapparent Infection

    infection associated with no detectable symptoms but caused by microorganisms capable of producing easily recognizable diseases, such a poliomyelitis or mumps.

  • Grade 1 Seroma, CTCAE|Grade 1 Seroma|Grade 1 Seroma

    symptomatic; simple aspiration indicated

  • Grade 2 Seroma, CTCAE|Grade 2 Seroma|Grade 2 Seroma

    symptomatic, elective invasive intervention indicated

  • Grade 3 Seroma, CTCAE|Grade 3 Seroma|Grade 3 Seroma

    a finding of leakage due to breakdown of an anastomosis (surgical connection of two separate anatomic structures) in the small bowel.

  • Seroma, CTCAE|Seroma|Seroma|Seroma

    asymptomatic; clinical or diagnostic observations only; intervention not indicated

  • Neonatal Infectious Disorder

    an infectious disorder that occurs during the neonatal period. representative examples include streptococcal infection, e.coli infection, and bacterial meningitis.

  • Allantoic Cyst

    an umbilical cyst that arises from allantoic tissue that did not regress during gestational development. most cases involve a patent urachus that allows for communication to the urinary bladder.

  • Grade 1 Seroma, CTCAE|Grade 1 Seroma|Grade 1 Seroma

    asymptomatic; clinical or diagnostic observations only; intervention not indicated

  • Grade 2 Seroma, CTCAE|Grade 2 Seroma|Grade 2 Seroma

    symptomatic; simple aspiration indicated

  • Grade 3 Seroma, CTCAE|Grade 3 Seroma|Grade 3 Seroma

    symptomatic, elective invasive intervention indicated

  • Seroma

    a collection of serum in the body.

  • Seroma, CTCAE|Seroma|Seroma|Seroma

    a finding of tumor-like collection of serum in the tissues.

  • Acute and Subacute Endocarditis, Unspecified|Acute and subacute endocarditis, unspecified

    evidence of acute and subacute endocarditis.

  • Acute Endocarditis

    acute inflammation of the endocardium. bacteria is the usual etiologic agent, and the distinction between "acute" and "subacute" has traditionally been made based on the pathogenic organism and clinical presentation.

Patient EducationClinical

Infectious Diseases

Germs, or microbes, are found everywhere - in the air, soil, and water. There are also germs on your skin and in your body. Many of them are harmless, and some can even be helpful. But some of them can make you sick. Infectious diseases are diseases that are caused by germs.

The full article covers:

  • What are infectious diseases?
  • What are the different types of germs that cause infectious diseases?
  • How can you get infectious diseases?
  • What are the symptoms of infectious diseases?
  • What are the treatments for infectious diseases?
  • Can infectious diseases be prevented?

Read the full article at MedlinePlus

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

Convert P39.9 to ICD-9-CMHistory

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

ICD-9-CM
771.89 Perinatal infection 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 P39.9Overview

Is P39.9 (Other infections specific to the perinatal period) a billable code?

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

What is the ICD-9 equivalent of P39.9?

Under the General Equivalence Mappings, infection specific to the perinatal period, unspecified converts to ICD-9-CM 771.89 (perinatal infection NEC). The mapping is approximate, so confirm the match fits the documentation.

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.