2026 ICD-10-CM Diagnosis Code Z77.9Other contact with and (suspected) exposures hazardous to health

ICD-10-CM Codes›Z00–Z99›Z77-Z99›suspected

ICD-10-CM Z77.9
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Z77.9 is a billable ICD-10-CM diagnosis code for other contact with and (suspected) exposures hazardous to health. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). The code is not accepted as a principal diagnosis by the Medicare Code Editor. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified status.

Code Identity

ICD-10-CM Code
Z77.9
Billable Status
Yes — Valid for Submission
Code Describes
Other contact with and (suspected) exposures hazardous to health
Short Description
Oth contact w and (suspected) exposures hazardous to health
Parent Code
Z77
Other contact with and (suspected) exposures hazardous to health

Code Classification

ChapterZ00–Z99Factors influencing health status and contact with health services
SectionZ77-Z99Persons with potential health hazards related to family and personal history and certain conditions influencing health status
CategorysuspectedOther contact with and exposures hazardous to health (Z77)
This CodeZ77.9Other contact with and (suspected) exposures hazardous to health

Code EditsBilling

Medicare Code Editor checks that affect claim validity for Z77.9.

Unacceptable principal diagnosis
There are selected codes that describe a circumstance which influences an individual's health status but not a current illness or injury, or codes that are not specific manifestations but may be due to an underlying cause. These codes are considered unacceptable as a principal diagnosis.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Congenital retinal dysplasia caused by teratogenic substance
  • Dangerous environment
  • Environment contains physical hazards
  • Exacerbation of constitutional dermatitis due to exposure to contact allergen
  • Exposure to carcinogenic substance
  • Exposure to pollution
  • Exposure to soapstone dust
  • Exposure to toxic agricultural agent
  • Exposure to toxic dust
  • Exposure to toxin, intent undetermined
  • Non-occupational exposure to toxic agricultural agent
  • Non-occupational exposure to toxic dust
  • Pollution
  • Retinal dysplasia

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Contact(with)
      • hazards to health NEC
    • Exposure(to)
      • hazards to health NEC

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR FAC025
Other specified status
Default principal diagnosis: inpatient No · outpatient Yes

Clinical InformationClinical

  • Retinal Dysplasia

    congenital, often bilateral, retinal abnormality characterized by the arrangement of outer nuclear retinal cells in a palisading or radiating pattern surrounding a central ocular space. this disorder is sometimes hereditary.

Convert Z77.9 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
V15.89 Hx-health hazards NEC
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About Z77.9Overview

Is Z77.9 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report other contact with and (suspected) exposures hazardous to health on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Can Z77.9 be a principal diagnosis?

No. The Medicare Code Editor rejects this code as a principal diagnosis because other contact with and (suspected) exposures hazardous to health describes a circumstance that influences health status rather than a current illness. Report it as a secondary diagnosis.

What is the ICD-9 equivalent of Z77.9?

Under the General Equivalence Mappings, other contact with and (suspected) exposures hazardous to health converts to ICD-9-CM V15.89 (hx-health hazards NEC). The mapping is approximate, so confirm the match fits the documentation.