2026 ICD-10-CM Diagnosis Code Z86.003Personal history of in-situ neoplasm of oral cavity, esophagus and stomach

ICD-10-CM Codes›Z00–Z99›Z77-Z99›Z86

ICD-10-CM Z86.003
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Z86.003 is a billable ICD-10-CM diagnosis code for personal history of in-situ neoplasm of oral cavity, esophagus and stomach. 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 history of melanoma in situ of oral mucous membrane. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Personal history of other disease.

Code Identity

ICD-10-CM Code
Z86.003
Billable Status
Yes — Valid for Submission
Code Describes
Personal history of in-situ neoplasm of oral cavity, esophagus and stomach
Short Description
Pers hx of in-situ neoplm of oral cavity, esoph and stomach
Parent Code
Z86.00
Personal history of in-situ neoplasm

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
CategoryZ86Personal history of certain other diseases
This CodeZ86.003Personal history of in-situ neoplasm of oral cavity, esophagus and stomach

Code EditsBilling

Medicare Code Editor checks that affect claim validity for Z86.003.

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

Z86.003 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.

  • History of melanoma in situ of oral mucous membrane

Tabular List NotesGuidance

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

Inclusion Terms

  • Conditions classifiable to D00

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.

    • History
      • personal (of)
        • in situ neoplasm
          • esophagus
    • History
      • personal (of)
        • in situ neoplasm
          • oral cavity
    • History
      • personal (of)
        • in situ neoplasm
          • stomach
    • History
      • personal (of)
        • neoplasm
          • in situ
            • esophagus
    • History
      • personal (of)
        • neoplasm
          • in situ
            • oral cavity
    • History
      • personal (of)
        • neoplasm
          • in situ
            • stomach

Clinical ClassificationClinical

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

CCSR FAC030
Personal history of other disease
Default principal diagnosis: inpatient No · outpatient Yes

Patient EducationClinical

Esophageal Cancer

The esophagus is a hollow tube that carries food and liquids from your throat to your stomach. Early esophageal cancer usually does not cause symptoms. Later, you may have symptoms such as:

Read the full article at MedlinePlus

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

Code History & ChangesHistory

Replacement Z86.003 replaces the following previously assigned code(s):

  • Z86.008 - Personal history of in-situ neoplasm of other site
FY 2020AddedAdded to the ICD-10-CM code setEffective October 1, 2019.
FY 2021–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About Z86.003Overview

Is Z86.003 (Personal history of in-situ neoplasm) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report personal history of in-situ neoplasm of oral cavity, esophagus and stomach on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Can Z86.003 be a principal diagnosis?

No. The Medicare Code Editor rejects this code as a principal diagnosis because personal history of in-situ neoplasm of oral cavity, esophagus and stomach describes a circumstance that influences health status rather than a current illness. Report it as a secondary diagnosis.

Is Z86.003 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 personal history of in-situ neoplasm of oral cavity, esophagus and stomach on inpatient claims.