Persons with potential health hazards related to family and personal history and certain conditions influencing health status (Z77-Z99)

Instructional notes

Official coding guidelines

From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.

Covers when and how to use Z codes (Z00-Z99) for encounters and supplementary information, including contact, status, history, screening, aftercare, exams, and social determinants of health.

• Use of Z Codes in Any Healthcare Setting (page 92)
• Z Codes Indicate a Reason for an Encounter or Provide Additional Information about a Patient Encounter (page 93)
• Categories of Z Codes (page 93)

Read Section I.C.21 (page 92)

Codes under Z77-Z99

Z77-Z99 can't be used on a claim. Pick a billable code below; grey headings group them.

• Z77Other contact with and (suspected) exposures hazardous to health
• Z78Other specified health status
• Z79Long term (current) drug therapy
• Z80Family history of primary malignant neoplasm
• Z81Family history of mental and behavioral disorders
• Z82Family history of certain disabilities and chronic diseases (leading to disablement)
• Z83Family history of other specific disorders
• Z84Family history of other conditions
• Z85Personal history of malignant neoplasm
• Z86Personal history of certain other diseases
• Z87Personal history of other diseases and conditions
• Z88Allergy status to drugs, medicaments and biological substances
• Z89Acquired absence of limb
• Z90Acquired absence of organs, not elsewhere classified
• Z91Personal risk factors, not elsewhere classified
• Z92Personal history of medical treatment
• Z93Artificial opening status
• Z94Transplanted organ and tissue status
• Z95Presence of cardiac and vascular implants and grafts
• Z96Presence of other functional implants
• Z97Presence of other devices
• Z98Other postprocedural states
• Z99Dependence on enabling machines and devices, not elsewhere classified

Z77-Z99 MS-DRGs

This code does not group to an MS-DRG as a principal diagnosis.

About the condition

Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.