Z86 Personal history of certain other diseases

Not billable (header)Chapter 21

Report one of the more specific codes below.

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Codes under this one

Z86.0 Personal history of in-situ and benign neoplasms and neoplasms of uncertain behaviorHeader
Z86.1 Personal history of infectious and parasitic diseasesHeader
Z86.2 Personal history of diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism
Z86.3 Personal history of endocrine, nutritional and metabolic diseasesHeader
Z86.5 Personal history of mental and behavioral disordersHeader
Z86.6 Personal history of diseases of the nervous system and sense organsHeader
Z86.7 Personal history of diseases of the circulatory systemHeader

Instructional notes

Chapter 21

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.

Section Z77-Z99

Code also

any follow-up examination (Z08-Z09)

This code

Code firstSequence the underlying condition first.

any follow-up examination after treatment (Z09)

Chapter 21: Factors influencing health status and contact with health services · Z77-Z99 Persons with potential health hazards related to family and personal history and certain conditions influencing health status (Z77-Z99)

Source: ICD-10-CM FY 2027 code descriptions and tabular list (CMS and CDC National Center for Health Statistics), effective 2026-10-01 through 2027-09-30 · CMS ICD-10 files. HCC mapping: CMS-HCC V28, payment year 2027. As of 2026-11-04.

Coverage and payment depend on the claim details; confirm with the Medicare Administrative Contractor.