2026 ICD-10-CM Diagnosis Code P78.89Other specified perinatal digestive system disorders

ICD-10-CM Codes›P00–P96›P76-P78›P78

ICD-10-CM P78.89
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

P78.89 is a billable ICD-10-CM diagnosis code for other specified perinatal digestive system disorders. 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 Neonatal digestive and feeding disorders.

Code Identity

ICD-10-CM Code
P78.89
Billable Status
Yes — Valid for Submission
Code Describes
Other specified perinatal digestive system disorders
Short Description
Other specified perinatal digestive system disorders
Same as the full description in the CMS dataset.
Parent Code
P78.8
Other specified perinatal digestive system disorders

Code Classification

ChapterP00–P96Certain conditions originating in the perinatal period
SectionP76-P78Digestive system disorders of newborn
CategoryP78Other perinatal digestive system disorders
This CodeP78.89Other specified perinatal digestive system disorders

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Cholestasis in newborn
  • Dermatitis of the newborn
  • Gastritis of newborn
  • Gastrointestinal hormone-secreting endocrine tumor
  • Hemophagocytic lymphohistiocytosis
  • Hepatocellular liver damage
  • Isolated neonatal sclerosing cholangitis
  • Macrophage activation syndrome
  • Neonatal disorder of oral mucosa
  • Neonatal esophagitis
  • Neonatal hepatocellular damage
  • Neonatal inflammatory skin and bowel disease
  • Neonatal malabsorption with gastrointestinal hormone-secreting endocrine tumor
  • Perinatal pneumoperitoneum
  • Periodic fever, infantile enterocolitis, autoinflammatory syndrome
  • Pneumoperitoneum
  • Progressive familial intrahepatic cholestasis type 2
  • Progressive intrahepatic cholestasis
  • Sclerosing cholangitis
  • Transient neonatal colitis

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.

    • Disorder(of)
      • digestive (system)
        • newborn
          • specified NEC

Clinical ClassificationClinical

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

CCSR PNL012
Neonatal digestive and feeding disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Pneumoperitoneum

    a condition with trapped gas or air in the peritoneal cavity, usually secondary to perforation of the internal organs such as the lung and the gastrointestinal tract, or to recent surgery. pneumoperitoneum may be purposely introduced to aid radiological examination.

  • Pneumoperitoneum, Artificial

    deliberate introduction of air into the peritoneal cavity.

  • Macrophage Activation Syndrome

    a serious complication of childhood systemic inflammatory disorders that is thought to be caused by excessive activation and proliferation of t-lymphocytes and macrophages. it is seen predominantly in children with systemic onset juvenile idiopathic arthritis.

  • Pneumoperitoneum

    free air within the peritoneal cavity.

Patient EducationClinical

Digestive Diseases

When you eat, your body breaks food down to a form it can use to build and nourish cells and provide energy. This process is called digestion.

Read the full article at MedlinePlus

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

Convert P78.89 to ICD-9-CMHistory

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

ICD-9-CM
777.8 Perinat GI sys dis 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 P78.89Overview

Is P78.89 (Other specified perinatal digestive system disorders) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report other specified perinatal digestive system disorders on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What is the ICD-9 equivalent of P78.89?

Under the General Equivalence Mappings, other specified perinatal digestive system disorders converts to ICD-9-CM 777.8 (perinat GI sys dis 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.