Z00-Z99
Factors influencing health status and contact with health services
Blocks in this chapter
Z00-Z13
Persons encountering health services for examinations
Z14-Z15
Genetic carrier and genetic susceptibility to disease
Z16
Resistance to antimicrobial drugs
Z17
Estrogen, and other hormones and factors receptor status
Z18
Retained foreign body fragments
Z19
Hormone sensitivity malignancy status
Z20-Z29
Persons with potential health hazards related to communicable diseases
Z30-Z39
Persons encountering health services in circumstances related to reproduction
Z40-Z53
Encounters for other specific health care
Z55-Z65
Persons with potential health hazards related to socioeconomic and psychosocial circumstances
Z66
Do not resuscitate status
Z67
Blood type
Z68
Body mass index [BMI]
Z69-Z76
Persons encountering health services in other circumstances
Z77-Z99
Persons with potential health hazards related to family and personal history and certain conditions influencing health status
Official Guidelines for Chapter 21
FY 2026 ›Sections that reference codes in Chapter 21
- I.B.3Code or codes from A00.0 through T88.9, Z00-Z99.8, U00-U85Z00-Z99.8General rules
- I.B.19.dUse of Z codesZ59.0General rules
- I.C.1.a.2)(e)Asymptomatic human immunodeficiency virusZ21Chapter 1 guidance
- I.C.1.a.2)(g)Previously diagnosed HIV-related illnessZ21Chapter 1 guidance
- I.C.1.a.2)(h)HIV Infection in Pregnancy, Childbirth and the PuerperiumZ21Chapter 1 guidance
- I.C.1.a.2)(i)Encounters for HIV testingZ11.4Chapter 1 guidance
- I.C.1.a.2)(j)HIV disease or HIV positive status managed by antiretroviral medicationZ21Chapter 1 guidance
- I.C.1.a.2)(k)Encounter for HIV Prophylaxis MeasuresZ29.81Chapter 1 guidance
Showing 8 of 77 sections that reference this range. Browse all FY 2026 guidelines.