2026 ICD-10-CM Diagnosis Code Z85.048Personal history of other malignant neoplasm of rectum, rectosigmoid junction, and anus

ICD-10-CM Codes›Z00–Z99›Z77-Z99›Z85

ICD-10-CM Z85.048
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Z85.048 is a billable ICD-10-CM diagnosis code for personal history of other malignant neoplasm of rectum, rectosigmoid junction, and anus. 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. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Personal history of malignant neoplasm.

Code Identity

ICD-10-CM Code
Z85.048
Billable Status
Yes — Valid for Submission
Code Describes
Personal history of other malignant neoplasm of rectum, rectosigmoid junction, and anus
Short Description
Prsnl hx of malig neoplm of rectum, rectosig junct, and anus
Parent Code
Z85.04
Personal history of malignant neoplasm of rectum, rectosigmoid junction, and anus

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 CodeZ85.048Personal history of other malignant neoplasm of rectum, rectosigmoid junction, and anus

Code EditsBilling

Medicare Code Editor checks that affect claim validity for Z85.048.

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

Z85.048 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 carcinoma of rectosigmoid junction
  • History of colorectal neoplasm
  • History of malignant neoplasm of anus
  • History of malignant neoplasm of cecum and/or colon and/or rectum
  • History of malignant neoplasm of colon
  • History of malignant neoplasm of rectum
  • History of rectosigmoid junction cancer

Tabular List NotesGuidance

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

Inclusion Terms

  • Conditions classifiable to C19 C21

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)
          • anus NEC
    • History
      • personal (of)
        • malignant neoplasm (of)
          • rectosigmoid junction NEC
    • History
      • personal (of)
        • malignant neoplasm (of)
          • rectum 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

Colorectal Cancer

Colorectal cancer is cancer that develops in the tissues of the colon or rectum. Your colon and rectum are part of your digestive system:

The full article covers:

  • What is colorectal cancer?
  • What causes colorectal cancer?
  • Who is more likely to develop colorectal cancer?
  • What are the symptoms of colorectal cancer?
  • What is screening for colorectal cancer and who needs it?
  • How is colorectal cancer diagnosed?
  • What are the treatments for colorectal cancer?
  • Can colorectal cancer be prevented?

Read the full article at MedlinePlus

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

Convert Z85.048 to ICD-9-CMHistory

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

ICD-9-CM
V10.06 Hx-rectal & anal malign
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 Z85.048Overview

Is Z85.048 a billable code?

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

What MS-DRG does Z85.048 group to?

On inpatient claims, personal history of other malignant neoplasm of rectum, rectosigmoid junction, and anus 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 Z85.048 be a principal diagnosis?

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

Is Z85.048 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 other malignant neoplasm of rectum, rectosigmoid junction, and anus on inpatient claims.

What is the ICD-9 equivalent of Z85.048?

Under the General Equivalence Mappings, personal history of other malignant neoplasm of rectum, rectosigmoid junction, and anus converts to ICD-9-CM V10.06 (hx-rectal & anal malign). The mapping is approximate, so confirm the match fits the documentation.