2026 ICD-10-CM Diagnosis Code Z77.110Contact with and (suspected) exposure to air pollution

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

ICD-10-CM Z77.110
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Z77.110 is a billable ICD-10-CM diagnosis code for contact with and (suspected) exposure to air pollution. 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 and exempt from POA reporting. Coders also document this condition as air pollution. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified status.

Code Identity

ICD-10-CM Code
Z77.110
Billable Status
Yes — Valid for Submission
Code Describes
Contact with and (suspected) exposure to air pollution
Short Description
Contact with and (suspected) exposure to air pollution
Same as the full description in the CMS dataset.
Parent Code
Z77.11
Contact with and (suspected) exposure to environmental pollution

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 CodeZ77.110Contact with and (suspected) exposure to air pollution

Code EditsBilling

Medicare Code Editor checks that affect claim validity for Z77.110.

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.

Present on Admission (POA)Billing

Z77.110 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Air pollution
  • Environmental pollution
  • Exposure to airborne emissions from burn pit
  • Exposure to polluted air
  • Exposure to polluted air, non-occupational
  • Pollution

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)
      • air pollution
    • Contact(with)
      • pollution
        • air
    • Exposure(to)
      • air pollution
    • Exposure(to)
      • pollution
        • air

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

  • Environmental Pollution

    contamination of the air, bodies of water, or land with substances that are harmful to human health and the environment.

  • Tobacco Smoke Pollution

    contamination of the air by tobacco smoke.

  • Air Pollution

    the presence of contaminants or pollutant substances in the air (air pollutants) that interfere with human health or welfare, or produce other harmful environmental effects. the substances may include gases; particulate matter; or volatile organic chemicals.

  • Air Pollution, Indoor

    the contamination of indoor air.

  • Air Pollution, Radioactive

    contamination of air with radioactive substances.

Patient EducationClinical

Air Pollution

Air pollution is a mixture of solid particles and gases in the air. Car emissions, chemicals from factories, dust, pollen and mold spores may be suspended as particles. Ozone, a gas, is a major part of air pollution in cities. When ozone forms air pollution, it's also called smog.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert Z77.110 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 Z77.110Overview

Is Z77.110 a billable code?

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

Can Z77.110 be a principal diagnosis?

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

Is Z77.110 exempt from POA reporting?

Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for contact with and (suspected) exposure to air pollution on inpatient claims.

What is the ICD-9 equivalent of Z77.110?

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