2026 ICD-10-CM Diagnosis Code Z85.89Personal history of malignant neoplasm of other organs and systems

ICD-10-CM Codes›Z00–Z99›Z77-Z99›Z85

ICD-10-CM Z85.89
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Z85.89 is a billable ICD-10-CM diagnosis code for personal history of malignant neoplasm of other organs and systems. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 826 through 830, 843 through 845. 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 H/O Malignant melanoma. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Personal history of malignant neoplasm.

Code Identity

ICD-10-CM Code
Z85.89
Billable Status
Yes — Valid for Submission
Code Describes
Personal history of malignant neoplasm of other organs and systems
Short Description
Personal history of malignant neoplasm of organs and systems
Parent Code
Z85.8
Personal history of malignant neoplasms of other organs and systems

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
CategoryZ85Personal history of malignant neoplasm
This CodeZ85.89Personal history of malignant neoplasm of other organs and systems

Code EditsBilling

Medicare Code Editor checks that affect claim validity for Z85.89.

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

Z85.89 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.

  • H/O Malignant melanoma
  • H/O: ear disorder
  • History of malignant neoplasm of external ear
  • History of malignant neoplasm of head and/or neck
  • History of malignant neoplasm of neck
  • History of malignant neoplasm of retroperitoneum
  • History of primitive neuroectodermal tumor

Tabular List NotesGuidance

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

Inclusion Terms

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)
        • malignant neoplasm (of)
          • specified site NEC

Clinical ClassificationClinical

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

CCSR FAC027
Personal history of malignant neoplasm
Default principal diagnosis: inpatient No · outpatient Yes

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 Z85.89 to ICD-9-CMHistory

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

ICD-9-CM
V10.89 Hx of malignancy 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 Z85.89Overview

Is Z85.89 a billable code?

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

What MS-DRG does Z85.89 group to?

On inpatient claims, personal history of malignant neoplasm of other organs and systems maps to MS-DRG 826, 827, 828, 829, 830, 843, 844, 845, with relative weights from 0.8516 to 4.6778 depending on complications. Higher weights mean higher Medicare reimbursement.

Can Z85.89 be a principal diagnosis?

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

Is Z85.89 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 malignant neoplasm of other organs and systems on inpatient claims.

What is the ICD-9 equivalent of Z85.89?

Under the General Equivalence Mappings, personal history of malignant neoplasm of other organs and systems converts to ICD-9-CM V10.89 (hx of malignancy NEC). The mapping is approximate, so confirm the match fits the documentation.