2026 ICD-10-CM Diagnosis Code Z82.79Family history of other congenital malformations, deformations and chromosomal abnormalities

ICD-10-CM Codes›Z00–Z99›Z77-Z99›leading to disablement

ICD-10-CM Z82.79
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Z82.79 is a billable ICD-10-CM diagnosis code for family history of other congenital malformations, deformations and chromosomal abnormalities. 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
Z82.79
Billable Status
Yes — Valid for Submission
Code Describes
Family history of other congenital malformations, deformations and chromosomal abnormalities
Short Description
Fam hx of congen malform, deformations and chromsoml abnlt
Parent Code
Z82.7
Family history of congenital malformations, deformations and chromosomal abnormalities

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
Categoryleading to disablementFamily history of certain disabilities and chronic diseases (Z82)
This CodeZ82.79Family history of other congenital malformations, deformations and chromosomal abnormalities

Code EditsBilling

Medicare Code Editor checks that affect claim validity for Z82.79.

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

Z82.79 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 achondroplasia
  • Family history of ambiguous genitalia
  • Family history of anencephaly
  • Family history of autosomal aneuploidy
  • Family history of autosomal translocation
  • Family history of chromosomal anomaly
  • Family history of cleft lip
  • Family history of cleft palate
  • Family history of cleft palate with cleft lip
  • Family history of complete trisomy 21 syndrome
  • Family history of complex congenital heart disease
  • Family history of congenital anomaly of cardiovascular system
  • Family history of congenital anomaly of ear
  • Family history of congenital diaphragmatic hernia
  • Family history of congenital disease
  • Family history of congenital Finnish nephrotic syndrome
  • Family history of congenital hip dysplasia
  • Family history of congenital hydrocephalus
  • Family history of congenital malformation
  • Family history of congenital microcephaly
  • Family history of congenital stenosis of aorta
  • Family history of Cowden syndrome
  • Family history of craniosynostosis
  • Family history of cystic hygroma
  • Family history of disorder due to sex chromosome abnormality
  • Family history of disorder of skeletal and/or smooth muscle
  • Family history of dysmorphism
  • Family history of fragile X syndrome
  • Family history of holoprosencephaly
  • Family history of hypospadias
  • Family history of intellectual disability
  • Family history of kidney disease
  • Family history of macrocephaly
  • Family history of Marfan syndrome
  • Family history of microcephaly
  • Family history of multiple congenital anomalies
  • Family history of neoplasm of skin
  • Family history of nephrotic syndrome
  • Family history of neurofibromatosis
  • Family history of osteogenesis imperfecta
  • Family history of Prader-Willi syndrome
  • Family history of pulmonary infundibular stenosis
  • Family history of sex chromosome aneuploidy
  • Family history of sex chromosome translocation
  • Family history of short stature
  • Family history of single congenital anomaly
  • Family history of Spina bifida
  • Family history of stenosis of aortic valve
  • Family history of transposition of great vessels
  • Family history of trisomy 13
  • Family history of trisomy 18
  • Family history of trisomy 18 syndrome
  • Family history of Turner syndrome
  • Family history of velocardiofacial syndrome
  • Family history of vesicoureteral reflux
  • FH: Cong. orthopedic anomaly
  • FH: Congenital GIT anomaly
  • FH: Congenital GU anomaly
  • FH: Congenital heart disease
  • FH: Congenital RS anomaly
  • FH: Ear disorder
  • FH: Obesity
  • Maternal history of congenital dislocated hip

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)
        • chromosomal anomaly
    • History
      • family (of)
        • congenital malformations and deformations

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

Birth Defects

A birth defect is a problem that happens while a baby is developing in the mother's body. Most birth defects happen during the first 3 months of pregnancy. One out of every 33 babies in the United States is born with a birth defect.

The full article covers:

  • What are birth defects?
  • What causes birth defects?
  • Who is at risk of having a baby with birth defects?
  • How are birth defects diagnosed?
  • What are the treatments for birth defects?
  • Can birth defects be prevented?

Read the full article at MedlinePlus

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

Convert Z82.79 to ICD-9-CMHistory

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

ICD-9-CM
V19.5 Fam hx-congen anomalies
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 Z82.79Overview

Is Z82.79 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report family history of other congenital malformations, deformations and chromosomal abnormalities on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Can Z82.79 be a principal diagnosis?

No. The Medicare Code Editor rejects this code as a principal diagnosis because family history of other congenital malformations, deformations and chromosomal abnormalities describes a circumstance that influences health status rather than a current illness. Report it as a secondary diagnosis.

Is Z82.79 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 congenital malformations, deformations and chromosomal abnormalities on inpatient claims.

What is the ICD-9 equivalent of Z82.79?

Under the General Equivalence Mappings, family history of other congenital malformations, deformations and chromosomal abnormalities converts to ICD-9-CM V19.5 (fam hx-congen anomalies). The mapping is a direct match.