ICD-10-CM · Chapter 21 · Z00-Z99
Factors influencing health status and contact with health services
1,425 billable diagnosis codes across 15 code blocks. FY2027 release.
Z00-Z13 Persons encountering health services for examinations
- Z00 Encounter for general examination without complaint, suspected or reported diagnosis
- Z01 Encounter for other special examination without complaint, suspected or reported diagnosis
- Z02 Encounter for administrative examination
- Z03 Encounter for medical observation for suspected diseases and conditions ruled out
- Z04 Encounter for examination and observation for other reasons
- Z05 Encounter for observation and evaluation of newborn for suspected diseases and conditions ruled out
- Z08 Encounter for follow-up examination after completed treatment for malignant neoplasm Billable
- Z09 Encounter for follow-up examination after completed treatment for conditions other than malignant neoplasm Billable
- Z11 Encounter for screening for infectious and parasitic diseases
- Z12 Encounter for screening for malignant neoplasms
- Z13 Encounter for screening for other diseases and disorders
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
- Z20 Contact with and (suspected) exposure to communicable diseases
- Z21 Asymptomatic human immunodeficiency virus [HIV] infection status Billable
- Z22 Carrier of infectious disease
- Z23 Encounter for immunization Billable
- Z28 Immunization not carried out and underimmunization status
- Z29 Encounter for other prophylactic measures
Z30-Z39 Persons encountering health services in circumstances related to reproduction
- Z30 Encounter for contraceptive management
- Z31 Encounter for procreative management
- Z32 Encounter for pregnancy test and childbirth and childcare instruction
- Z33 Pregnant state
- Z34 Encounter for supervision of normal pregnancy
- Z36 Encounter for antenatal screening of mother
- Z37 Outcome of delivery
- Z38 Liveborn infants according to place of birth and type of delivery
- Z39 Encounter for maternal postpartum care and examination
Z40-Z53 Encounters for other specific health care
- Z40 Encounter for prophylactic surgery
- Z41 Encounter for procedures for purposes other than remedying health state
- Z42 Encounter for plastic and reconstructive surgery following medical procedure or healed injury
- Z43 Encounter for attention to artificial openings
- Z44 Encounter for fitting and adjustment of external prosthetic device
- Z45 Encounter for adjustment and management of implanted device
- Z46 Encounter for fitting and adjustment of other devices
- Z47 Orthopedic aftercare
- Z48 Encounter for other postprocedural aftercare
- Z49 Encounter for care involving renal dialysis
- Z51 Encounter for other aftercare and medical care
- Z52 Donors of organs and tissues
- Z53 Persons encountering health services for specific procedures and treatment, not carried out
Z55-Z65 Persons with potential health hazards related to socioeconomic and psychosocial circumstances
- Z55 Problems related to education and literacy
- Z56 Problems related to employment and unemployment
- Z57 Occupational exposure to risk factors
- Z58 Problems related to physical environment
- Z59 Problems related to housing and economic circumstances
- Z60 Problems related to social environment
- Z62 Problems related to upbringing
- Z63 Other problems related to primary support group, including family circumstances
- Z64 Problems related to certain psychosocial circumstances
- Z65 Problems related to other psychosocial circumstances
Z66 Do not resuscitate status
Z67 Blood type
Z68 Body mass index (BMI)
Z69-Z76 Persons encountering health services in other circumstances
- Z69 Encounter for mental health services for victim and perpetrator of abuse
- Z70 Counseling related to sexual attitude, behavior and orientation
- Z71 Persons encountering health services for other counseling and medical advice, not elsewhere classified
- Z72 Problems related to lifestyle
- Z73 Problems related to life management difficulty
- Z74 Problems related to care provider dependency
- Z75 Problems related to medical facilities and other health care
- 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
- Z77 Other contact with and (suspected) exposures hazardous to health
- Z78 Other specified health status
- Z79 Long term (current) drug therapy
- Z80 Family history of primary malignant neoplasm
- Z81 Family history of mental and behavioral disorders
- Z82 Family 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
- Z87 Personal history of other diseases and conditions
- Z88 Allergy status to drugs, medicaments and biological substances
- Z89 Acquired absence of limb
- Z90 Acquired absence of organs, not elsewhere classified
- Z91 Personal risk factors, not elsewhere classified
- Z92 Personal history of medical treatment
- Z93 Artificial opening status
- Z94 Transplanted organ and tissue status
- Z95 Presence of cardiac and vascular implants and grafts
- Z96 Presence of other functional implants
- Z97 Presence of other devices
- Z98 Other postprocedural states
- Z99 Dependence on enabling machines and devices, not elsewhere classified
Last reviewed: September 2026