2026 ICD-10-CM Diagnosis Code Z86.03Personal history of neoplasm of uncertain behavior

ICD-10-CM Codes›Z00–Z99›Z77-Z99›Z86

ICD-10-CM Z86.03
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Z86.03 is a billable ICD-10-CM diagnosis code for personal history of neoplasm of uncertain behavior. 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 atypical fibroxanthoma of skin. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Personal history of other disease.

Code Identity

ICD-10-CM Code
Z86.03
Billable Status
Yes — Valid for Submission
Code Describes
Personal history of neoplasm of uncertain behavior
Short Description
Personal history of neoplasm of uncertain behavior
Same as the full description in the CMS dataset.
Parent Code
Z86.0
Personal history of in-situ and benign neoplasms and neoplasms of uncertain behavior

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 CodeZ86.03Personal history of neoplasm of uncertain behavior

Code EditsBilling

Medicare Code Editor checks that affect claim validity for Z86.03.

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

Z86.03 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 atypical fibroxanthoma of skin
  • History of carotid body neoplasm
  • History of colorectal neoplasm
  • History of craniopharyngioma
  • History of gastrointestinal stromal tumor
  • History of mucinous borderline tumor of ovary
  • History of neoplasm of pituitary gland
  • History of neoplasm of uncertain behavior
  • History of neoplasm of urinary bladder
  • History of serous cystadenoma of borderline malignancy of ovary

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)
        • neoplasm
          • uncertain behavior

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

Clinical InformationClinical

  • Personal History of Neoplasm of Uncertain Behavior

    an individual history of a neoplasm that was not determined to be benign or malignant.

Patient EducationClinical

Cancer

Cancer is not just one disease but many diseases. Cancer begins in your cells, which are the building blocks of your body. Usually, your body forms new cells as needed, replacing old cells that die. Sometimes this process goes wrong. New cells grow even when you don't need them, and old cells don't die when they should.

The full article covers:

  • What is cancer?
  • What are the types of cancer?
  • How does cancer develop?
  • What are the symptoms of cancer?
  • How is cancer diagnosed?
  • What are the treatments for cancer?
  • Can cancer be prevented?

Read the full article at MedlinePlus

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

Convert Z86.03 to ICD-9-CMHistory

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

ICD-9-CM
V13.89 Hx diseases 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 Z86.03Overview

Is Z86.03 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report personal history of neoplasm of uncertain behavior on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Can Z86.03 be a principal diagnosis?

No. The Medicare Code Editor rejects this code as a principal diagnosis because personal history of neoplasm of uncertain behavior describes a circumstance that influences health status rather than a current illness. Report it as a secondary diagnosis.

Is Z86.03 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 neoplasm of uncertain behavior on inpatient claims.

What is the ICD-9 equivalent of Z86.03?

Under the General Equivalence Mappings, personal history of neoplasm of uncertain behavior converts to ICD-9-CM V13.89 (hx diseases NEC). The mapping is approximate, so confirm the match fits the documentation.