ICD-10-CM 2027 diagnosis code
Z83.1Family history of other infectious and parasitic diseases
Z83.1 is a valid, billable ICD-10-CM code for family history of other infectious and parasitic diseases. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About Z83.1
Z83.1 is the ICD-10-CM diagnosis code for family history of other infectious and parasitic diseases. It belongs to category Z83 (family history of other specific disorders), block Z77-Z99 (persons with potential health hazards related to family and personal history and certain conditions influencing health status) and chapter 21 (factors influencing health status and contact with health services). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.
Within Z83, choose Z83.1 (other infectious and parasitic diseases) only when documentation doesn't support a more specific option: human immunodeficiency virus [HIV] disease (Z83.0), diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (Z83.2), diabetes mellitus (Z83.3), other endocrine, nutritional and metabolic diseases (Z83.4), eye and ear disorders (Z83.5), other diseases of the respiratory system (Z83.6) and diseases of the digestive system (Z83.7).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 795 (Normal Newborn, relative weight 0.2022) and DRG 951 (Other Factors Influencing Health Status, relative weight 0.5577), in MDC 15 (Newborns and Other Neonates with Conditions Originating in the Perinatal Period) and MDC 23 (Factors Influencing Health Status and Other Contacts with Health Services), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
It is not acceptable as the principal diagnosis for an inpatient stay; it may be reported as a secondary diagnosis.
It is exempt from present-on-admission (POA) reporting, so no POA indicator is required.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Before ICD-10, this condition was coded in ICD-9-CM as V18.8 (family history of infectious and parasitic diseases).
Coding notes
Notes that apply from higher levels
Instructions written at a parent level also apply to Z83.1.
› From Z83 Family history of other specific disorders
- contact with and (suspected) exposure to communicable disease in the family (Z20.-)
Broader instructions also apply from Z77-Z99 Persons with potential health hazards related to family and personal history and certain conditions influencing health status and Chapter 21: Factors influencing health status and contact with health services.
Alphabetic index entries
2 entriesTerms in the official ICD-10-CM index that lead to Z83.1.
MS-DRG v44.0 grouping
All DRGs →Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.
MDC 15 · Newborns and Other Neonates with Conditions Originating in the Perinatal Period
MDC 23 · Factors Influencing Health Status and Other Contacts with Health Services
ICD-9-CM equivalent
Converter →- V18.8Family history of infectious and parasitic diseasesexact
From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about Z83.1
Is Z83.1 billable?
- Yes. Z83.1 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Z83.1 be used as a principal diagnosis?
- No. It is not acceptable as the principal diagnosis for an inpatient stay; it may be reported as a secondary diagnosis.
Is Z83.1 a CC or MCC?
- No. Z83.1 is neither a CC nor an MCC under MS-DRG v44.0.
What DRG does Z83.1 group to?
- Z83.1 is used in the MS-DRG v44.0 logic for MS-DRG 795 (Normal Newborn) and MS-DRG 951 (Other Factors Influencing Health Status). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.