2026 ICD-10-CM Diagnosis Code Z13.818Encounter for screening for other digestive system disorders

ICD-10-CM Codes›Z00–Z99›Z00-Z13›Z13

ICD-10-CM Z13.818
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Z13.818 is a billable ICD-10-CM diagnosis code for encounter for screening for other digestive system disorders. 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 Encounter for observation and examination for conditions ruled out (excludes infectious disease, neoplasm, mental disorders).

Code Identity

ICD-10-CM Code
Z13.818
Billable Status
Yes — Valid for Submission
Code Describes
Encounter for screening for other digestive system disorders
Short Description
Encounter for screening for other digestive system disorders
Same as the full description in the CMS dataset.
Parent Code
Z13.81
Encounter for screening for digestive system disorders

Code Classification

ChapterZ00–Z99Factors influencing health status and contact with health services
SectionZ00-Z13Persons encountering health services for examinations
CategoryZ13Encounter for screening for other diseases and disorders
This CodeZ13.818Encounter for screening for other digestive system disorders

Code EditsBilling

Medicare Code Editor checks that affect claim validity for Z13.818.

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

Z13.818 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.

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.

    • Screening(for)
      • disease or disorder
        • digestive tract NEC
    • Screening(for)
      • gastrointestinal condition

Clinical ClassificationClinical

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

CCSR FAC003
Encounter for observation and examination for conditions ruled out (excludes infectious disease, neoplasm, mental disorders)
Default principal diagnosis: inpatient No · outpatient Yes

Patient EducationClinical

Health Screening

Screenings are tests that look for diseases before you have symptoms. Screening tests can find diseases early, when they're easier to treat. You can get some screenings in your doctor's office. Others need special equipment, so you may need to go to a different office or clinic.

Read the full article at MedlinePlus

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

Convert Z13.818 to ICD-9-CMHistory

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

ICD-9-CM
V82.89 Screen for condition 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 Z13.818Overview

Is Z13.818 (Encounter for screening for digestive system disorders) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report encounter for screening for other digestive system disorders on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Can Z13.818 be a principal diagnosis?

No. The Medicare Code Editor rejects this code as a principal diagnosis because encounter for screening for other digestive system disorders describes a circumstance that influences health status rather than a current illness. Report it as a secondary diagnosis.

Is Z13.818 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 encounter for screening for other digestive system disorders on inpatient claims.

What is the ICD-9 equivalent of Z13.818?

Under the General Equivalence Mappings, encounter for screening for other digestive system disorders converts to ICD-9-CM V82.89 (screen for condition NEC). The mapping is approximate, so confirm the match fits the documentation.