2026 ICD-10-CM Diagnosis Code Z83.79Family history of other diseases of the digestive system

ICD-10-CM Codes›Z00–Z99›Z77-Z99›Z83

ICD-10-CM Z83.79
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Z83.79 is a billable ICD-10-CM diagnosis code for family history of other diseases of the digestive system. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). The code is not accepted as a principal diagnosis by the Medicare Code Editor and exempt from POA reporting. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Family history of disease.

Code Identity

ICD-10-CM Code
Z83.79
Billable Status
Yes — Valid for Submission
Code Describes
Family history of other diseases of the digestive system
Short Description
Family history of other diseases of the digestive system
Same as the full description in the CMS dataset.
Parent Code
Z83.7
Family history of diseases of the digestive system

Code Classification

ChapterZ00–Z99Factors influencing health status and contact with health services
SectionZ77-Z99Persons with potential health hazards related to family and personal history and certain conditions influencing health status
CategoryZ83Family history of other specific disorders
This CodeZ83.79Family history of other diseases of the digestive system

Code EditsBilling

Medicare Code Editor checks that affect claim validity for Z83.79.

Unacceptable principal diagnosis
There are selected codes that describe a circumstance which influences an individual's health status but not a current illness or injury, or codes that are not specific manifestations but may be due to an underlying cause. These codes are considered unacceptable as a principal diagnosis.

Present on Admission (POA)Billing

Z83.79 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Family history of Barrett esophagus
  • Family history of celiac disease
  • Family history of chronic ulcerative proctitis
  • Family history of cirrhosis of liver
  • Family history of disorder of pancreas
  • Family history of diverticulitis of colon
  • Family history of gastroschisis
  • Family history of inflammatory bowel disease
  • Family history of intestinal obstruction
  • Family history of irritable colon
  • Family history of lactose intolerance
  • FH: Biliary disease
  • FH: Colitis
  • FH: Crohn's disease
  • FH: Duodenal ulcer
  • FH: Gallbladder disease
  • FH: Gastric ulcer
  • FH: Gastrointestinal disease
  • FH: Hepatitis
  • FH: Liver disease
  • FH: Peptic ulceration
  • FH: Ulcerative colitis
  • History of closure of enterostomy
  • History of stoma closure surgery

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.

    • History
      • family (of)
        • disease or disorder (of)
          • digestive

Clinical ClassificationClinical

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

CCSR FAC028
Family history of disease
Default principal diagnosis: inpatient No · outpatient Yes

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 Z83.79 to ICD-9-CMHistory

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

ICD-9-CM
V18.59 Fam hx digest disord NEC
Exact Match The mapping is direct, with no qualifiers.

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 Z83.79Overview

Is Z83.79 (Family history of diseases of the digestive system) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report family history of other diseases of the digestive system on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Can Z83.79 be a principal diagnosis?

No. The Medicare Code Editor rejects this code as a principal diagnosis because family history of other diseases of the digestive system describes a circumstance that influences health status rather than a current illness. Report it as a secondary diagnosis.

Is Z83.79 exempt from POA reporting?

Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for family history of other diseases of the digestive system on inpatient claims.

What is the ICD-9 equivalent of Z83.79?

Under the General Equivalence Mappings, family history of other diseases of the digestive system converts to ICD-9-CM V18.59 (fam hx digest disord NEC). The mapping is a direct match.