2026 ICD-10-CM Diagnosis Code Z56.3Stressful work schedule

ICD-10-CM Codes›Z00–Z99›Z55-Z65›Z56

ICD-10-CM Z56.3
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Z56.3 is a billable ICD-10-CM diagnosis code for stressful work schedule. 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 stress at work. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Socioeconomic/psychosocial factors.

Code Identity

ICD-10-CM Code
Z56.3
Billable Status
Yes — Valid for Submission
Code Describes
Stressful work schedule
Short Description
Stressful work schedule
Same as the full description in the CMS dataset.
Parent Code
Z56
Problems related to employment and unemployment

Code Classification

ChapterZ00–Z99Factors influencing health status and contact with health services
SectionZ55-Z65Persons with potential health hazards related to socioeconomic and psychosocial circumstances
CategoryZ56Problems related to employment and unemployment
This CodeZ56.3Stressful work schedule

Code EditsBilling

Medicare Code Editor checks that affect claim validity for Z56.3.

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

Z56.3 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.

  • Stress at work
  • Stressful work schedule
  • Works long hours

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.

    • Difficult, difficulty(in)
      • work
        • schedule
    • Problem(with) (related to)
      • employment
        • stressful schedule
    • Problem(with) (related to)
      • work schedule (stressful)
    • Stress
      • work schedule

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 Z56.3 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 Z56.3Overview

Is Z56.3 (Problems related to employment and unemployment) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report stressful work schedule on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Can Z56.3 be a principal diagnosis?

No. The Medicare Code Editor rejects this code as a principal diagnosis because stressful work schedule describes a circumstance that influences health status rather than a current illness. Report it as a secondary diagnosis.

Is Z56.3 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 stressful work schedule on inpatient claims.

What is the ICD-9 equivalent of Z56.3?

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