2027 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 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

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 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 951. 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 the other POA exempt codes in Persons with potential health hazards related to family and personal history and certain conditions influencing health status (Z77-Z99).

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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to Z82.79: its own notes plus those printed at block Z77-Z99 and Chapter 21. A note printed at a category, block or chapter applies to every code under it.

Code Also

A second code may be needed to fully describe the condition; the note gives no sequencing direction.

From Block Z77-Z99 Persons with potential health hazards related to family and personal history and certain conditions influencing health status applies to 567 codes
  • any follow-up examination (Z08-Z09)

Notes

General instructions on how these codes are used.

From Chapter 21 (Z00-Z99) Factors influencing health status and contact with health services applies to 1,425 codes
  • Z codes represent reasons for encounters. A corresponding procedure code must accompany a Z code if a procedure is performed. Categories Z00-Z99 are provided for occasions when circumstances other than a disease, injury or external cause classifiable to categories A00-Y89 are recorded as 'diagnoses' or 'problems'. This can arise in two main ways:
  • (a) When a person who may or may not be sick encounters the health services for some specific purpose, such as to receive limited care or service for a current condition, to donate an organ or tissue, to receive prophylactic vaccination (immunization), or to discuss a problem which is in itself not a disease or injury.
  • (b) When some circumstance or problem is present which influences the person's health status but is not in itself a current illness or injury.

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name Z82.79, its category, or a range that includes it.

Use Additional Code 1

These codes say to use an additional code from the note, and Z82.79 is one of the codes named.

  • Z15 Genetic susceptibility to disease
    code, if applicable, for any associated family history of the disease (Z80-Z84) names Z80-Z84, which includes this code

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

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, 2026 through September 30, 2027.

What MS-DRG does Z82.79 group to?

On inpatient claims, family history of other congenital malformations, deformations and chromosomal abnormalities maps to MS-DRG 951 (other Factors Influencing Health Status), which carries a relative weight of 0.5574. Higher weights mean higher Medicare reimbursement.

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. The code appears in the Persons with potential health hazards related to family and personal history and certain conditions influencing health status (Z77-Z99) range of the CMS exempt list.

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.