Factors influencing health status and contact with health services (Z00–Z99)
ICD-10 Chapter 21 codes Z00–Z99 are used for documenting factors that affect a patient's health status and reasons for contact with health services outside of active disease or injury. These codes help capture encounters like routine checkups, screenings, and ongoing care management.
This chapter includes codes for situations such as general health examinations, vaccination encounters, and monitoring a patient’s health after treatment or surgery. It also covers codes for addressing personal or family history of diseases, lifestyle factors, or socioeconomic circumstances impacting health. For healthcare providers and coders, these codes are essential for accurately representing status factors that influence care without describing a current illness. They ensure a comprehensive record of preventive care, follow-ups, and other interactions focused on maintaining health rather than treating active medical conditions.
- Persons encountering health services for examinations (Z00-Z
- Genetic carrier and genetic susceptibility to disease (Z14-Z
- Resistance to antimicrobial drugs (Z16)
- Estrogen, and other hormones and factors receptor status (Z1
- Retained foreign body fragments (Z18)
- Hormone sensitivity malignancy status (Z19)
- Persons with potential health hazards related to communicabl
- Persons encountering health services in circumstances relate
- Encounters for other specific health care (Z40-Z53)
- Persons with potential health hazards related to socioeconom
- Do not resuscitate status (Z66)
- Blood type (Z67)
- Body mass index (BMI) (Z68)
- Persons encountering health services in other circumstances
- Persons with potential health hazards related to family and
Factors influencing health status and contact with health services (Z00–Z99)
Note: 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.
Persons encountering health services for examinations (Z00-Z13)
- Encounter for general examination without complaint, suspected or reported diagnosis (Z00)
- Encounter for other special examination without complaint, suspected or reported diagnosis (Z01)
- Encounter for administrative examination (Z02)
- Encounter for medical observation for suspected diseases and conditions ruled out (Z03)
- Encounter for examination and observation for other reasons (Z04)
- Encounter for observation and evaluation of newborn for suspected diseases and conditions ruled out (Z05)
- Encounter for follow-up examination after completed treatment for malignant neoplasm (Z08)
- Encounter for follow-up examination after completed treatment for conditions other than malignant neoplasm (Z09)
- Encounter for screening for infectious and parasitic diseases (Z11)
- Encounter for screening for malignant neoplasms (Z12)
- Encounter for screening for other diseases and disorders (Z13)
Genetic carrier and genetic susceptibility to disease (Z14-Z15)
Resistance to antimicrobial drugs (Z16)
- Resistance to antimicrobial drugs (Z16)
Estrogen, and other hormones and factors receptor status (Z17)
- Estrogen, and other hormones and factors receptor status (Z17)
Retained foreign body fragments (Z18)
- Retained foreign body fragments (Z18)
Hormone sensitivity malignancy status (Z19)
- Hormone sensitivity malignancy status (Z19)
Persons with potential health hazards related to communicable diseases (Z20-Z29)
- Contact with and (suspected) exposure to communicable diseases (Z20)
- Asymptomatic human immunodeficiency virus [HIV] infection status (Z21)
- Carrier of infectious disease (Z22)
- Encounter for immunization (Z23)
- Immunization not carried out and underimmunization status (Z28)
- Encounter for other prophylactic measures (Z29)
Persons encountering health services in circumstances related to reproduction (Z30-Z39)
- Encounter for contraceptive management (Z30)
- Encounter for procreative management (Z31)
- Encounter for pregnancy test and childbirth and childcare instruction (Z32)
- Pregnant state (Z33)
- Encounter for supervision of normal pregnancy (Z34)
- Encounter for antenatal screening of mother (Z36)
- Outcome of delivery (Z37)
- Liveborn infants according to place of birth and type of delivery (Z38)
- Encounter for maternal postpartum care and examination (Z39)
- Weeks of gestation (Z3A)
Encounters for other specific health care (Z40-Z53)
- Encounter for prophylactic surgery (Z40)
- Encounter for procedures for purposes other than remedying health state (Z41)
- Encounter for plastic and reconstructive surgery following medical procedure or healed injury (Z42)
- Encounter for attention to artificial openings (Z43)
- Encounter for fitting and adjustment of external prosthetic device (Z44)
- Encounter for adjustment and management of implanted device (Z45)
- Encounter for fitting and adjustment of other devices (Z46)
- Orthopedic aftercare (Z47)
- Encounter for other postprocedural aftercare (Z48)
- Encounter for care involving renal dialysis (Z49)
- Encounter for other aftercare and medical care (Z51)
- Donors of organs and tissues (Z52)
- Persons encountering health services for specific procedures and treatment, not carried out (Z53)
Persons with potential health hazards related to socioeconomic and psychosocial circumstances (Z55-Z65)
- Problems related to education and literacy (Z55)
- Problems related to employment and unemployment (Z56)
- Occupational exposure to risk factors (Z57)
- Problems related to physical environment (Z58)
- Problems related to housing and economic circumstances (Z59)
- Problems related to social environment (Z60)
- Problems related to upbringing (Z62)
- Other problems related to primary support group, including family circumstances (Z63)
- Problems related to certain psychosocial circumstances (Z64)
- Problems related to other psychosocial circumstances (Z65)
Do not resuscitate status (Z66)
- Do not resuscitate (Z66)
Blood type (Z67)
- Blood type (Z67)
Body mass index (BMI) (Z68)
- Body mass index [BMI] (Z68)
Persons encountering health services in other circumstances (Z69-Z76)
- Encounter for mental health services for victim and perpetrator of abuse (Z69)
- Counseling related to sexual attitude, behavior and orientation (Z70)
- Persons encountering health services for other counseling and medical advice, not elsewhere classified (Z71)
- Problems related to lifestyle (Z72)
- Problems related to life management difficulty (Z73)
- Problems related to care provider dependency (Z74)
- Problems related to medical facilities and other health care (Z75)
- Persons encountering health services in other circumstances (Z76)
Persons with potential health hazards related to family and personal history and certain conditions influencing health status (Z77-Z99)
- Other contact with and (suspected) exposures hazardous to health (Z77)
- Other specified health status (Z78)
- Long term (current) drug therapy (Z79)
- Family history of primary malignant neoplasm (Z80)
- Family history of mental and behavioral disorders (Z81)
- Family history of certain disabilities and chronic diseases (leading to disablement) (Z82)
- Family history of other specific disorders (Z83)
- Family history of other conditions (Z84)
- Personal history of malignant neoplasm (Z85)
- Personal history of certain other diseases (Z86)
- Personal history of other diseases and conditions (Z87)
- Allergy status to drugs, medicaments and biological substances (Z88)
- Acquired absence of limb (Z89)
- Acquired absence of organs, not elsewhere classified (Z90)
- Personal risk factors, not elsewhere classified (Z91)
- Personal history of medical treatment (Z92)
- Artificial opening status (Z93)
- Transplanted organ and tissue status (Z94)
- Presence of cardiac and vascular implants and grafts (Z95)
- Presence of other functional implants (Z96)
- Presence of other devices (Z97)
- Other postprocedural states (Z98)
- Dependence on enabling machines and devices, not elsewhere classified (Z99)
