When is ICD-10 code Z77 used?

Doctors, hospitals, and insurers may use ICD-10 code Z77 when recording other contact with and (suspected) exposures hazardous to health in a standardized format. This entry may also act as a broader category that points toward more specific child codes.

Does ICD-10 code Z77 confirm a diagnosis?

No. A code helps standardize documentation and claims, but it should not be read as a substitute for a clinician's full assessment.

ICD10

ICD-10 Code Z77: Other contact with and (suspected) exposures hazardous to health

Name: ICD-10 Code Z77: Other contact with and (suspected) exposures hazardous to health
Creator: HealthAssure Clinical Team
Published: 2026-05-21T06:51:08.552Z

Z77 is an ICD-10 diagnosis entry used to group records related to Other contact with and (suspected) exposures hazardous to health. You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen. ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Factors influencing health status and contact with health services (Z00-Z99).

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

What is this code?

ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Factors influencing health status and contact with health services (Z00-Z99).

When is it used?

May be used when a clinician documents other contact with and (suspected) exposures hazardous to health in a patient's medical record.
May appear in hospital records, claims, referrals, and clinical documentation.
This code may act more like a grouping or parent code, so a more specific child code may be used in final documentation when available.

What it does not mean

A code alone does not explain severity, treatment plan, or outcome.
A medical code should not be treated as a substitute for a doctor's diagnosis or advice.
This entry may represent a broader category rather than the most specific billable code.

Code hierarchy

chapter

21Factors influencing health status and contact with health services (Z00-Z99)

block

Z77-Z99Persons with potential health hazards related to family and personal history and certain conditions influencing health status

currentZ77-Z99

Official coding notes

Includes

contact with and (suspected) exposures to potential hazards to health

Excludes2 (may code together if documented)

contact with and (suspected) exposure to communicable diseases (Z20.-)
exposure to (parental) (environmental) tobacco smoke in the perinatal period (P96.81)
newborn affected by noxious substances transmitted via placenta or breast milk (P04.-)
occupational exposure to risk factors (Z57.-)
retained foreign body (Z18.-)
retained foreign body fully removed (Z87.821)
toxic effects of substances chiefly nonmedicinal as to source (T51-T65)

Where you may see this code

You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen.

Related specialists

General Physician

Sibling codes

Z78Other specified health status Z79Long term (current) drug therapy Z80Family history of primary malignant neoplasm Z81Family history of mental and behavioral disorders Z82Family history of certain disabilities and chronic diseases (leading to disablement)Z83Family history of other specific disorders Z84Family history of other conditions Z85Personal history of malignant neoplasm Z86Personal history of certain other diseases Z87Personal history of other diseases and conditions Z88Allergy status to drugs, medicaments and biological substances Z89Acquired absence of limb Z90Acquired absence of organs, not elsewhere classified Z91Personal risk factors, not elsewhere classified Z92Personal history of medical treatment Z93Artificial opening status Z94Transplanted organ and tissue status Z95Presence of cardiac and vascular implants and grafts Z96Presence of other functional implants Z97Presence of other devices Z98Other postprocedural states Z99Dependence on enabling machines and devices, not elsewhere classified

Coding guidelines

Common synonyms

Other contact with and (suspected) exposures hazardous to healthOther contact with andOther contact with and suspected exposures hazardous to health

Frequently asked questions

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.