Persons with potential health hazards related to family and personal history and certain conditions influencing health status (Z77-Z99) ICD-10-CM
The Z77–Z99 section covers persons with potential health hazards related to family and personal history and certain conditions influencing health status with 754 ICD-10-CM diagnosis codes, of which 567 are billable in fiscal year 2027. The section is organized into the 23 code ranges listed below.
Code Also
A "code also" note instructs that two codes may be required to fully describe a condition, but this note does not provide sequencing direction.
Code Ranges in This Section 23 ranges · 754 codes
The info icon previews the code ranges inside each row and its instructional notations from the official Tabular List.
About the Z77–Z99 Code Range
These codes describe suspected hazardous exposures, family and personal medical histories, and health states such as allergies, missing body parts, implants, and device dependence.
Z77 separates exposures by source, while Z78 identifies other specified health states. Z79 groups long-term drug use by drug type. Family history appears in Z80 through Z84, organized by the relative's condition. Z85 through Z87 organize personal disease histories by condition or body system.
Z88 separates drug and biological substance allergies by substance. Z89 identifies a missing limb or limb part by location; acquired absence means it resulted from injury or disease rather than being present at birth. Z90 identifies missing organs or parts by site. Z91 addresses personal risk factors, and Z92 identifies prior medical treatment by type.
Z93 through Z97 distinguish artificial openings, transplants, cardiovascular implants, other functional implants, and devices. Their subdivisions identify the opening site, transplanted tissue or organ, or implant or device type. Z98 identifies other states after procedures; Z99 separates dependence by machine or device.
FY 2027 changes: The FY 2027 ICD-10-CM update, effective October 1, 2026, added Z77.013, Z77.32, Z77.33, Z77.40, Z77.41, Z77.42, Z77.49, Z86.17, Z87.8901, Z87.8902, Z87.8903, Z87.8904 and 2 other codes and deleted Z84.1, Z87.890, Z91.011 and Z91.012.
Questions About This Page
How many codes are in the Z77-Z99 range?
The Z77-Z99 range contains 754 ICD-10-CM diagnosis codes in FY 2027. 567 of them are billable, and the rest are category headers that organize the section.
What conditions does Z77-Z99 cover?
The range covers persons with potential health hazards related to family and personal history and certain conditions influencing health status. The code ranges listed above break it into groups of related conditions, and each one links to its own page with the full code list.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
