Is ICD-10-CM code P37 billable?

No, P37 (Other congenital infectious and parasitic diseases) is a non-billable ICD-10-CM code. It must be coded to a more specific subcategory before it can be used for reimbursement.

What chapter does ICD-10-CM code P37 belong to?

P37 belongs to Chapter 16 of the ICD-10-CM tabular list: P00–P96 (Certain Conditions Originating in the Perinatal Period).

P37Not billable, use a more specific code below

Other congenital infectious and parasitic diseases

In Infections specific to the perinatal period (P35-P39), chapter 16: Certain Conditions Originating in the Perinatal Period

8 billable codes under P37: 7 are an MCC; none map to an HCC.A CC or MCC (major CC) is a secondary diagnosis that raises the MS-DRG payment.

Instructional notes

Excludes2: not included here, code separately if applicable

congenital syphilis (A50.-)
infectious neonatal diarrhea (A00-A09)
necrotizing enterocolitis in newborn (P77.-)
noninfectious neonatal diarrhea (P78.3)
ophthalmia neonatorum due to gonococcus (A54.31)
tetanus neonatorum (A33)

Also applies, from Infections specific to the perinatal period (P35-P39)

These notes sit on P35-P39 and apply to every code under it, including P37.

Includes: conditions that are coded here

Infections acquired in utero, during birth via the umbilicus, or during the first 28 days after birth

Excludes2: not included here, code separately if applicable

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)

Official coding guidelines

From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.

Coding of conditions that originate from before birth through the 28th day after birth, including newborn record rules, prematurity, low birth weight, sepsis, and stillbirth.

General Perinatal Rules (page 71)
Observation and Evaluation of Newborns for Suspected Conditions not Found (page 73)
Coding Additional Perinatal Diagnoses (page 73)
Prematurity and Fetal Growth Retardation (page 73)
Low birth weight and immaturity status (page 74)
Bacterial Sepsis of Newborn (page 74)
Stillbirth (page 74)
COVID-19 Infection in Newborn (page 74)

Read Section I.C.16 (page 71)

All codes under P37

P37 can't be used on a claim. Pick a billable code below; grey headings group them.

P37 MS-DRGs

As the principal diagnosis, the billable codes under P37 group to MS-DRG 791, 793, or 794 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.

DRG 791 Prematurity with Major Problems (7 of 8 codes)
DRG 793 Full Term Neonate with Major Problems (7 of 8 codes)
DRG 794 Neonate with Other Significant Problems (1 of 8 codes)

About the condition

Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.

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.

Parasitic Diseases

Parasites are living things that use other living things - like your body - for food and a place to live. You can get them from contaminated food or water, a bug bite, or sexual contact. Some parasitic diseases are easily treated and some are not.

Code history

Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.