Z82.0
Family history of epilepsy and other diseases of the nervous system
Z82.0 (also written Z820) is a billable ICD-10-CM diagnosis code for family history of epilepsy and other diseases of the nervous system. It is part of the FY2027 code set, effective October 1, 2026. It is one of the 13 codes in category Z82 (Family history of certain disabilities and chronic diseases (leading to disablement)). The Alphabetic Index lists it under 3 entries. Its coding notes include a Code also instruction.
Guidelines tip
From the FY2027 Official Guidelines. ICD10Ref adds no rules of its own.
History codes can go on any record. The reason for the encounter is sequenced first, with history codes as additional diagnoses.
Code also
Two codes may be needed to describe the condition. This note gives no sequencing order.
Also from chapter/block level (1 note)
- any follow-up examination (Z08-Z09)
Care settings
How CMS programs treat this code. These are CMS claim edits and list entries, not coverage or eligibility rules.
Hospice: not accepted as primary
Not accepted as the principal diagnosis on a hospice claim (bill types 081x and 082x). The Integrated OCE returns an edit for this code.
Reason: Supplementary or additional code, not allowed as principal diagnosis.
Inclusion terms
Conditions classified to this code.
- Conditions classifiable to G00-G99
Notes
Also from chapter/block level (3 notes)
- 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.
Alphabetic Index terms
Terms the official Alphabetic Index lists for this code. 3 entries