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ICD-10-CM 2027 diagnosis code

Z57.31Occupational exposure to environmental tobacco smoke

✓ Billable / specificPOA exemptNot a principal dx

Z57.31 is a valid, billable ICD-10-CM code for occupational exposure to environmental tobacco smoke. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About Z57.31

Z57.31 is the ICD-10-CM diagnosis code for occupational exposure to environmental tobacco smoke. It belongs to category Z57 (occupational exposure to risk factors), block Z55-Z65 (persons with potential health hazards related to socioeconomic and psychosocial circumstances) and chapter 21 (factors influencing health status and contact with health services). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within Z57.3 (occupational exposure to other air contaminants), Z57.31 is specifically for occupational exposure to environmental tobacco smoke. Related codes cover other air contaminants (Z57.39).

The conditions in its Excludes2 note aren't part of Z57.31, but may be coded alongside it if the patient has both: exposure to environmental tobacco smoke (Z77.22).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 951 (Other Factors Influencing Health Status, relative weight 0.5577), in MDC 23 (Factors Influencing Health Status and Other Contacts with Health Services), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It is not acceptable as the principal diagnosis for an inpatient stay; it may be reported as a secondary diagnosis.

It is exempt from present-on-admission (POA) reporting, so no POA indicator is required.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as V62.1 (adverse effects of work environment).

Coding notes

Excludes2Not included here — may be reported together if both conditions exist
  • exposure to environmental tobacco smoke (Z77.22)

Notes that apply from higher levels

Instructions written at a parent level also apply to Z57.31.

Broader instructions also apply from Chapter 21: Factors influencing health status and contact with health services.

Alphabetic index entries

1 entries

Terms in the official ICD-10-CM index that lead to Z57.31.

Codes whose notes reference Z57.31

  • C07Use additional code
  • C08Use additional code
  • C09Use additional code
  • C10Use additional code
  • C11Use additional code
  • C12Use additional code
  • C13Use additional code
  • C14Use additional code
  • C32Use additional code
  • C33Use additional code
  • C34Use additional code
  • C39Use additional code
  • D00.0Use additional code
  • D02Use additional code
  • G31.84Use additional code
  • H65Use additional code
  • H66Use additional code
  • I20Use additional code
  • I21Use additional code
  • I22Use additional code
  • I25Use additional code
  • I70Use additional code
  • J37Use additional code
  • J40Use additional code
  • J41Use additional code
  • J42Use additional code
  • J45Use additional code
  • J47Use additional code
  • J81Use additional code
  • J98Use additional code
  • K05Use additional code
  • K11Use additional code
  • K12Use additional code
  • K13Use additional code
  • K14Use additional code
  • T65.22Use additional code
  • Z77.22Excludes2
  • Z85Use additional code

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

MDC 23 · Factors Influencing Health Status and Other Contacts with Health Services

ICD-9-CM equivalent

Converter →
  • V62.1Adverse effects of work environmentapproximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about Z57.31

Is Z57.31 billable?

Yes. Z57.31 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can Z57.31 be used as a principal diagnosis?

No. It is not acceptable as the principal diagnosis for an inpatient stay; it may be reported as a secondary diagnosis.

Is Z57.31 a CC or MCC?

No. Z57.31 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does Z57.31 group to?

Z57.31 is used in the MS-DRG v44.0 logic for MS-DRG 951 (Other Factors Influencing Health Status). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for Z57.31?

The CMS General Equivalence Mappings map Z57.31 to ICD-9-CM V62.1.