2027 ICD-10-CM Diagnosis Code P39.9Infection specific to the perinatal period, unspecified
ICD-10-CM Codes›P00–P96›P35-P39›P39
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Not Chronic
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 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 791, 793. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 46 closely related codes. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Perinatal infections.
Code Identity
Code Classification
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 disease of central nervous system
- Acute infectious peritonitis
- Acute infective endocarditis
- Acute localized peritonitis caused by infection
- Acute symptomatic epileptic seizure due to acute infection of central nervous system
- Acute symptomatic epileptic seizure due to acute infectious disease
- 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
- Complication associated with cardiac pacemaker lead
- Complication of transplanted liver
- Congenital hypoplasia of adrenal gland
- Congenital infection caused by Pseudomonas aeruginosa
- Congenital infectious disease
- Congenital non-bacterial non-viral infection
- Descending necrotizing mediastinitis
- Descending necrotizing mediastinitis due to infection of neck
- 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 associated with cardiac pacemaker lead
- Infection associated with implantable electrode of neurological device
- Infection associated with neurological device
- 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 bite wound
- 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 neck
- 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 mediastinitis
- 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
- Minimal change disease
- Minimal change disease due to infectious disease
- MIRAGE syndrome
- Mixed infectious disease
- Multiple abscesses
- Named sign of foot
- Neonatal clinical infection
- Neonatal colibacillosis
- Neonatal hemolysis with systemic bacterial infection
- Neonatal infection caused by Streptococcus group B
- 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
- Perinatal fetal and/or neonatal infection
- 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
- Pus at uterine os cervix
- Right acoustic neuritis due to infectious disease
- Right sided infective endocarditis
- Secondary eosinophilia
- Secondary tic disorder
- Seroma
- Seroma following procedure
- Short stature co-occurrent and due to endocrine disorder
- 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
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to P39.9: its own notes plus those printed at P39, block P35-P39, and Chapter 16. A note printed at a category, block or chapter applies to every code under it.
Includes
Further defines, or gives examples of, the content of the category.
- conditions that have their origin in the fetal or perinatal period (before birth through the first 28 days after birth) even if morbidity occurs later
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.
- asymptomatic human immunodeficiency virus [HIV] infection status (Z21)
- congenital gonococcal infection (A54.-)
- congenital pneumonia (P23.-)
- congenital syphilis (A50.-)
- human immunodeficiency virus [HIV] disease (B20)
- infant botulism (A48.51)
- infectious diseases not specific to the perinatal period (A00-B99, J09, J10.-)
- intestinal infectious disease (A00-A09)
- laboratory evidence of human immunodeficiency virus [HIV] (R75)
- tetanus neonatorum (A33)
Use Additional Code
Add a second code, after this one, to fully describe the condition.
- code to identify organism or specific infection
Notes
General instructions on how these codes are used.
- Codes from this chapter are for use on newborn records only, never 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 P39.9, its category, or a range that includes it.
Excludes2 2
These codes carry an Excludes2 note naming P39.9: its condition is not part of those codes, and both may be reported when the patient has both.
- Chapter 1 (A00-B99) Certain infectious and parasitic diseases
- P00.2 Newborn affected by maternal infectious and parasitic diseases
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Infection, infected, infective (opportunistic) B99.9
congenital P39.9
newborn P39.9
perinatal period P39.9
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
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.
Code HistoryHistory
Questions About P39.9Overview
What is the ICD-10 code for infection specific to the perinatal period, unspecified?
The ICD-10-CM code for infection specific to the perinatal period, unspecified is P39.9 (sometimes written as P399). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
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, 2026 through September 30, 2027.
What MS-DRG does P39.9 group to?
When infection specific to the perinatal period, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 793, 791, with relative weights from 4.1073 to 4.2192 depending on complications. Higher weights mean higher Medicare reimbursement.
Is P39.9 a CC or MCC?
CMS lists P39.9 as a CC (complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 46 closely related codes in its exclusion list.
Does P39.9 need an additional code?
When the condition applies, yes. The Use Additional Code note at P39, which applies to P39.9, reads: code to identify organism or specific infection. The additional code is reported after P39.9.
