U.S. category index · FY 2027

Z ICD-10-CM Categories: Category Index

Browse 90 top-level ICD-10-CM categories beginning with Z, then follow their complete FY 2027 child-code hierarchies.

Complete category list

Categories beginning with Z

Open a category to continue through its complete hierarchy of more specific codes.

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

Z09

Encounter for follow-up examination after completed treatment for conditions other than malignant neoplasm

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

Genetic carrier

Z15

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

Contact with and (suspected) exposure to communicable diseases

Z21

Asymptomatic human immunodeficiency virus [HIV] infection status

Z22

Carrier of infectious disease

Z23

Encounter for immunization

Z28

Immunization not carried out and underimmunization status

Z29

Encounter for other prophylactic measures

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

Z3A

Weeks of gestation

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

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

Z67

Blood type

Z68

Body mass index [BMI]

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

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

Transparency

Source and release

Data release

U.S. ICD-10-CM · FY 2027

Effective date

Oct 1, 2026

This category index is generated from Vero’s repository-backed ICD-10-CM hierarchy. Every listed category is a top-level record, and each linked category page exposes its direct child codes.

Review the CDC/NCHS ICD-10-CM source

Category navigation

Frequently asked questions

Which ICD-10-CM categories begin with Z?

This index lists 90 top-level categories beginning with Z from Vero’s FY 2027 U.S. ICD-10-CM reference dataset.

How do I find a more specific Z code?

Open a category below, then follow its linked child-code hierarchy until you reach the code supported by the documentation.

Which ICD-10-CM release does this Z index use?

The index uses the FY 2027 U.S. ICD-10-CM release and the repository-backed hierarchy displayed on each linked code page.

Is every Z category billable?

No. These are top-level categories used for navigation. Follow the hierarchy to a sufficiently specific code and confirm the active code set, official guidance, and payer requirements.

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