2026 ICD-10-CM Diagnosis Code Z57.31Occupational exposure to environmental tobacco smoke

ICD-10-CM Codes›Z00–Z99›Z55-Z65›Z57

ICD-10-CM Z57.31
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Z57.31 is a billable ICD-10-CM diagnosis code for occupational exposure to environmental tobacco smoke. 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. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Socioeconomic/psychosocial factors.

Code Identity

ICD-10-CM Code
Z57.31
Billable Status
Yes — Valid for Submission
Code Describes
Occupational exposure to environmental tobacco smoke
Short Description
Occupational exposure to environmental tobacco smoke
Same as the full description in the CMS dataset.
Parent Code
Z57.3
Occupational exposure to other air contaminants

Code Classification

ChapterZ00–Z99Factors influencing health status and contact with health services
SectionZ55-Z65Persons with potential health hazards related to socioeconomic and psychosocial circumstances
CategoryZ57Occupational exposure to risk factors
This CodeZ57.31Occupational exposure to environmental tobacco smoke

Code EditsBilling

Medicare Code Editor checks that affect claim validity for Z57.31.

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

Z57.31 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.

  • Occupational exposure to environmental tobacco smoke

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Type 2 Excludes

  • exposure to environmental tobacco smoke Z77.22

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.

    • Exposure(to)
      • occupational
        • environmental tobacco smoke

Clinical ClassificationClinical

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

CCSR FAC019
Socioeconomic/psychosocial factors
Default principal diagnosis: inpatient No · outpatient No

Patient EducationClinical

Occupational Health

Occupational health problems occur at work or because of the kind of work you do. These problems can include:

Read the full article at MedlinePlus

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

Convert Z57.31 to ICD-9-CMHistory

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

ICD-9-CM
V62.1 Adverse eff-work environ
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 Z57.31Overview

Is Z57.31 (Occupational exposure to other air contaminants) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report occupational exposure to environmental tobacco smoke on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Can Z57.31 be a principal diagnosis?

No. The Medicare Code Editor rejects this code as a principal diagnosis because occupational exposure to environmental tobacco smoke describes a circumstance that influences health status rather than a current illness. Report it as a secondary diagnosis.

Is Z57.31 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 occupational exposure to environmental tobacco smoke on inpatient claims.

What is the ICD-9 equivalent of Z57.31?

Under the General Equivalence Mappings, occupational exposure to environmental tobacco smoke converts to ICD-9-CM V62.1 (adverse eff-work environ). The mapping is approximate, so confirm the match fits the documentation.