Z84.0
Family history of diseases of the skin and subcutaneous tissue
This code does not map to a risk-adjusting HCC in the loaded models.
Coding notes
Excludes 1 never coded together · Excludes 2 may co-exist
Conditions classifiable to L00-L99
any follow-up examination (Z08-Z09)
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.
Official Guidelines for Z84.0
FY 2026 ›Sections that reference Z84.0
- I.C.21.c.4)History (of)
… history of certain disabilities and chronic diseases (leading to disablement) Z83 Family history of other specific disorders Z84 Family history of other conditions Z85 Personal history of malignant neoplasm Z86 Personal history of certain other diseases …
- I.B.3Code or codes from A00.0 through T88.9, Z00-Z99.8, U00-U85Conventions & general rules
The appropriate code or codes from A00.0 through T88.9, Z00-Z99.8, and U00-U85 must be used to identify diagnoses, symptoms, conditions, problems, complaints or other reason(s) for the …
- I.C.20.a.1)Used with any code in the range of A00.0-T88.9, Z00-Z99Chapter 20
An external cause code may be used with any code in the range of A00.0-T88.9, Z00-Z99, classification that represents a health condition due to an external cause. …
- III.APrevious conditionsReporting additional diagnoses
… However, history codes (categories Z80-Z87) may be used as secondary codes if the historical condition or family history has an impact on current care or influences …
- IV.BCodes from A00.0 through T88.9, Z00-Z99, U00-U85Outpatient services
The appropriate code(s) from A00.0 through T88.9, Z00-Z99 and U00-U85 must be used to identify diagnoses, symptoms, conditions, problems, complaints, or other reason(s) for the …
- IV.EEncounters for circumstances other than a disease or injuryOutpatient services
… The Factors Influencing Health Status and Contact with Health Services codes (Z00- Z99) are provided to deal with occasions when circumstances other than a disease or injury are recorded as diagnosis or problems. …
Showing 6 of 7. Search the guidelines for Z84. Sections whose FY 2026 text names Z84.0, its Z84 category, or a range containing it — the chapter guidance above is the authoritative source.
Find Z84.0 in the alphabetic index
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