ICD-10-CM 2027 diagnosis code
Z82.0Family history of epilepsy and other diseases of the nervous system
Z82.0 is a valid, billable ICD-10-CM code for family history of epilepsy and other diseases of the nervous system. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.Short description: Family history of epilepsy and oth dis of the nervous sys
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 Z82.0
Z82.0 is the ICD-10-CM diagnosis code for family history of epilepsy and other diseases of the nervous system. It belongs to category Z82 (family history of certain disabilities and chronic diseases (leading to disablement)), 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 Z82, choose Z82.0 (epilepsy and other diseases of the nervous system) only when documentation doesn't support a more specific option: blindness and visual loss (Z82.1), deafness and hearing loss (Z82.2), stroke (Z82.3), ischemic heart disease and other diseases of the circulatory system (Z82.4), asthma and other chronic lower respiratory diseases (Z82.5), arthritis and other diseases of the musculoskeletal system and connective tissue (Z82.6), congenital malformations, deformations and chromosomal abnormalities (Z82.7) and other disabilities and chronic diseases leading to disablement, not elsewhere classified (Z82.8).
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 V17.2 (family history of other neurological diseases).
Coding notes
Notes that apply from higher levels
Instructions written at a parent level also apply to Z82.0.
Alphabetic index entries
3 entriesTerms in the official ICD-10-CM index that lead to Z82.0.
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 →- V17.2Family history of other neurological 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 Z82.0
Is Z82.0 billable?
- Yes. Z82.0 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Z82.0 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 Z82.0 a CC or MCC?
- No. Z82.0 is neither a CC nor an MCC under MS-DRG v44.0.
What DRG does Z82.0 group to?
- Z82.0 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.