2026 ICD-10-CM Diagnosis Code Z86.31Personal history of diabetic foot ulcer

ICD-10-CM Codes›Z00–Z99›Z77-Z99›Z86

ICD-10-CM Z86.31
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Z86.31 is a billable ICD-10-CM diagnosis code for personal history of diabetic foot ulcer. 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 H/O: Admission in last year for diabetes foot problem. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Personal history of other disease.

Code Identity

ICD-10-CM Code
Z86.31
Billable Status
Yes — Valid for Submission
Code Describes
Personal history of diabetic foot ulcer
Short Description
Personal history of diabetic foot ulcer
Same as the full description in the CMS dataset.
Parent Code
Z86.3
Personal history of endocrine, nutritional and metabolic diseases

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 CodeZ86.31Personal history of diabetic foot ulcer

Code EditsBilling

Medicare Code Editor checks that affect claim validity for Z86.31.

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

Z86.31 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: Admission in last year for diabetes foot problem
  • History of diabetic foot ulcer

Tabular List NotesGuidance

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

Type 2 Excludes

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)
        • diabetic foot ulcer
    • History
      • personal (of)
        • disease or disorder (of)
          • endocrine
            • diabetic foot ulcer
    • History
      • personal (of)
        • disease or disorder (of)
          • metabolic
            • diabetic foot ulcer

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

Diabetic Foot

Diabetes is a disease in which your blood glucose, or blood sugar, levels are too high. Glucose comes from foods you eat. The cells of your body need glucose for energy. A hormone called insulin helps the glucose get into your cells.

The full article covers:

  • What is diabetes?
  • How does diabetes cause foot problems?
  • How can I protect my feet if I have diabetes?
  • When should I see my health care provider about diabetic foot problems?

Read the full article at MedlinePlus

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

Convert Z86.31 to ICD-9-CMHistory

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

ICD-9-CM
V12.29 Hx-endocr/meta/immun dis
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 Z86.31Overview

Is Z86.31 a billable code?

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

Can Z86.31 be a principal diagnosis?

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

Is Z86.31 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 diabetic foot ulcer on inpatient claims.

What is the ICD-9 equivalent of Z86.31?

Under the General Equivalence Mappings, personal history of diabetic foot ulcer converts to ICD-9-CM V12.29 (hx-endocr/meta/immun dis). The mapping is approximate, so confirm the match fits the documentation.