Z00-Z99
ICD-10-CM Chapter 21: Factors influencing health status and contact with health services
Chapter 21 of the ICD-10-CM tabular list covers Z00-Z99. It contains 15 blocks of related categories, listed below with the categories published in each.
Notes
- 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.
Z00-Z13: Persons encountering health services for examinations
- Z00Encntr for general exam w/o complaint, susp or reprtd dxcategory
- Z01Encntr for oth sp exam w/o complaint, suspected or reprtd dxcategory
- Z02Encounter for administrative examinationcategory
- Z03Encntr for medical obs for susp diseases and cond ruled outcategory
- Z04Encounter for examination and observation for other reasonscategory
- Z05Enctr for Obs & eval of NB for susp diseases and cond R/Ocategory
- Z08Encntr for follow-up exam after trtmt for malignant neoplasm
- Z09Encntr for f/u exam aft trtmt for cond oth than malig neoplm
- Z11Encounter for screening for infec/parastc diseasescategory
- Z12Encounter for screening for malignant neoplasmscategory
- Z13Encounter for screening for other diseases and disorderscategory
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
- Z20Contact w and (suspected) exposure to communicable diseasescategory
- Z21Asymptomatic human immunodeficiency virus infection status
- Z22Carrier of infectious diseasecategory
- Z23Encounter for immunization
- Z28Immunization not carried out and underimmunization statuscategory
- Z29Encounter for other prophylactic measurescategory
Z30-Z39: Persons encountering health services in circumstances related to reproduction
- Z30Encounter for contraceptive managementcategory
- Z31Encounter for procreative managementcategory
- Z32Encntr for preg test and chldbrth and childcare instructioncategory
- Z33Pregnant statecategory
- Z34Encounter for supervision of normal pregnancycategory
- Z36Encounter for antenatal screening of mothercategory
- Z3AWeeks of gestationcategory
- Z37Outcome of deliverycategory
- Z38Liveborn infants according to place of birth and type of delcategory
- Z39Encounter for maternal postpartum care and examinationcategory
Z40-Z53: Encounters for other specific health care
- Z40Encounter for prophylactic surgerycategory
- Z41Encntr for proc for purposes oth than remedying health statecategory
- Z42Encntr for plast/recnst surg fol med proc or healed injurycategory
- Z43Encounter for attention to artificial openingscategory
- Z44Encounter for fit/adjst of external prosthetic devicecategory
- Z45Encounter for adjustment and management of implanted devicecategory
- Z46Encounter for fitting and adjustment of other devicescategory
- Z47Orthopedic aftercarecategory
- Z48Encounter for other postprocedural aftercarecategory
- Z49Encounter for care involving renal dialysiscategory
- Z51Encounter for other aftercare and medical carecategory
- Z52Donors of organs and tissuescategory
- Z53Persons encntr hlth serv for spec proc & trtmt, not crd outcategory
Z55-Z65: Persons with potential health hazards related to socioeconomic and psychosocial circumstances
- Z55Problems related to education and literacycategory
- Z56Problems related to employment and unemploymentcategory
- Z57Occupational exposure to risk factorscategory
- Z58Problems related to physical environmentcategory
- Z59Problems related to housing and economic circumstancescategory
- Z60Problems related to social environmentcategory
- Z62Problems related to upbringingcategory
- Z63Oth prob rel to prim support group, inc family circumstancescategory
- Z64Problems related to certain psychosocial circumstancescategory
- Z65Problems related to other psychosocial circumstancescategory
Z66: Do not resuscitate status
Z67: Blood type
Z68: Body mass index [BMI]
Z69-Z76: Persons encountering health services in other circumstances
- Z69Encntr for mental health serv for victim and perp of abusecategory
- Z70Counseling related to sexual attitude, behavior and orientncategory
- Z71Persons encntr health serv for oth cnsl and med advice, NECcategory
- Z72Problems related to lifestylecategory
- Z73Problems related to life management difficultycategory
- Z74Problems related to care provider dependencycategory
- Z75Problems related to medical facilities and other health carecategory
- Z76Persons encountering health services in other circumstancescategory
Z77-Z99: Persons with potential health hazards related to family and personal history and certain conditions influencing health status
- Z77Oth contact w and (suspected) exposures hazardous to healthcategory
- Z78Other specified health statuscategory
- Z79Long term (current) drug therapycategory
- Z80Family history of primary malignant neoplasmcategory
- Z81Family history of mental and behavioral disorderscategory
- Z82Fam hx of certain disabil & chr dis (leading to disablement)category
- Z83Family history of other specific disorderscategory
- Z84Family history of other conditionscategory
- Z85Personal history of malignant neoplasmcategory
- Z86Personal history of certain other diseasescategory
- Z87Personal history of other diseases and conditionscategory
- Z88Allergy status to drug/meds/biol substcategory
- Z89Acquired absence of limbcategory
- Z90Acquired absence of organs, not elsewhere classifiedcategory
- Z91Personal risk factors, not elsewhere classifiedcategory
- Z92Personal history of medical treatmentcategory
- Z93Artificial opening statuscategory
- Z94Transplanted organ and tissue statuscategory
- Z95Presence of cardiac and vascular implants and graftscategory
- Z96Presence of other functional implantscategory
- Z97Presence of other devicescategory
- Z98Other postprocedural statescategory
- Z99Dependence on enabling machines and devices, NECcategory
Source
ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.