2027 ICD-10-CM Diagnosis Code Z82.0Family history of epilepsy and other diseases of the nervous system
Z82.0 is a billable ICD-10-CM diagnosis code for family history of epilepsy and other diseases of the nervous system. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 795, 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
Code Classification
Code EditsBilling
Medicare Code Editor checks that affect claim validity for Z82.0.
Present on Admission (POA)Billing
Z82.0 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 acute medical disorder
- Family history of amyotrophic lateral sclerosis
- Family history of ataxia
- Family history of Charcot-Marie-Tooth disease
- Family history of dementia
- Family history of disorder of peripheral nervous system
- Family history of disorder of skeletal and/or smooth muscle
- Family history of familial dysautonomia
- Family history of headache disorder
- Family history of movement disorder
- Family history of narcolepsy
- Family history of neoplasm of central nervous system
- Family history of neoplasm of skin
- Family history of neurological disorder
- Family history of neuropathy
- Family history of Parkinson's disease
- Family history of periodic limb movement disorder
- Family history of restless legs syndrome
- Family history of seizure disorder
- Family history of sleep apnea
- Family history of spinocerebellar ataxia
- Family history of Steinert myotonic dystrophy
- Family history of transient ischemic attack
- Family history of trigeminal neuralgia
- Family history of tuberous sclerosis
- Family history: Cerebral palsy
- FH: Brain disorder
- FH: CNS disorder
- FH: Epilepsy
- FH: Hemiplegia
- FH: Huntington's chorea
- FH: Migraine
- FH: Motor neurone disease
- FH: Multiple sclerosis
- FH: Muscular dystrophy
- FH: Paraplegia
- FH: Parkinsonism
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to Z82.0: 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.
Applicable To
Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.
Code Also
A second code may be needed to fully describe the condition; the note gives no sequencing direction.
Notes
General instructions on how these codes are used.
- 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 Z82.0, its category, or a range that includes it.
Use Additional Code 1
These codes say to use an additional code from the note, and Z82.0 is one of the codes named.
- Z15 Genetic susceptibility to disease
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
family (of) See Also: History, personal (of);
neurological NEC Z82.0
epilepsy Z82.0
Huntington's chorea Z82.0
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Epilepsy
Epilepsy is a brain disorder that causes people to have recurring seizures. The seizures happen when clusters of nerve cells, or neurons, in the brain send out the wrong signals. People may have strange sensations and emotions or behave strangely. They may have violent muscle spasms or lose consciousness.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert Z82.0 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About Z82.0Overview
What is the ICD-10 code for family history of epilepsy and other diseases of the nervous system?
The ICD-10-CM code for family history of epilepsy and other diseases of the nervous system is Z82.0 (sometimes written as Z820). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is Z82.0 a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report family history of epilepsy and other diseases of the nervous system on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does Z82.0 group to?
On inpatient claims, family history of epilepsy and other diseases of the nervous system maps to MS-DRG 951, 795, with relative weights from 0.2022 to 0.5574 depending on complications. Higher weights mean higher Medicare reimbursement.
Can Z82.0 be a principal diagnosis?
No. The Medicare Code Editor rejects this code as a principal diagnosis because family history of epilepsy and other diseases of the nervous system describes a circumstance that influences health status rather than a current illness. Report it as a secondary diagnosis.
Is Z82.0 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 epilepsy and other diseases of the nervous system 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.
