2026 ICD-10-CM Diagnosis Code Z46.81Encounter for fitting and adjustment of insulin pump

ICD-10-CM Codes›Z00–Z99›Z40-Z53›Z46

ICD-10-CM Z46.81
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Z46.81 is a billable ICD-10-CM diagnosis code for encounter for fitting and adjustment of insulin pump. 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. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Implant, device or graft related encounter.

Code Identity

ICD-10-CM Code
Z46.81
Billable Status
Yes — Valid for Submission
Code Describes
Encounter for fitting and adjustment of insulin pump
Short Description
Encounter for fitting and adjustment of insulin pump
Same as the full description in the CMS dataset.
Parent Code
Z46.8
Encounter for fitting and adjustment of other specified devices

Code Classification

ChapterZ00–Z99Factors influencing health status and contact with health services
SectionZ40-Z53Encounters for other specific health care
CategoryZ46Encounter for fitting and adjustment of other devices
This CodeZ46.81Encounter for fitting and adjustment of insulin pump

Code EditsBilling

Medicare Code Editor checks that affect claim validity for Z46.81.

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

Z46.81 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.

Tabular List NotesGuidance

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

Inclusion Terms

  • Encounter for insulin pump instruction and training
  • Encounter for insulin pump titration

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.

    • Counseling(for)
      • insulin pump use
    • Counseling(for)
      • use (of)
        • insulin pump
    • Encounter(with health service) (for)
      • insulin pump titration
    • Encounter(with health service) (for)
      • removal (of)
        • insulin pump
    • Encounter(with health service) (for)
      • titration, insulin pump
    • Encounter(with health service) (for)
      • training
        • insulin pump
    • Fitting(and adjustment) (of)
      • insulin pump
    • Removal(from) (of)
      • insulin pump

Clinical ClassificationClinical

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

CCSR FAC009
Implant, device or graft related encounter
Default principal diagnosis: inpatient No · outpatient Yes

Patient EducationClinical

Diabetes

Diabetes, also known as diabetes mellitus, is a disease in which your blood glucose, or blood sugar, levels are too high. Glucose is your body's main source of energy. Your body can make glucose, but it also comes from the food you eat. Insulin is a hormone made by your pancreas.

The full article covers:

  • What is diabetes?
  • What are the types of diabetes?
  • What causes diabetes?
  • Who is more likely to develop diabetes?
  • What are the symptoms of diabetes?
  • How is diabetes diagnosed?
  • What are the treatments for diabetes?
  • Can diabetes be prevented?

Read the full article at MedlinePlus

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

Convert Z46.81 to ICD-9-CMHistory

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

ICD-9-CM
V53.91 Fit/adjust insulin pump
Approximate The match is approximate rather than exact.
ICD-9-CM
V65.46 Insulin pump training
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 Z46.81Overview

Is Z46.81 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report encounter for fitting and adjustment of insulin pump on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Can Z46.81 be a principal diagnosis?

No. The Medicare Code Editor rejects this code as a principal diagnosis because encounter for fitting and adjustment of insulin pump describes a circumstance that influences health status rather than a current illness. Report it as a secondary diagnosis.

Is Z46.81 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 encounter for fitting and adjustment of insulin pump on inpatient claims.

What is the ICD-9 equivalent of Z46.81?

Under the General Equivalence Mappings, encounter for fitting and adjustment of insulin pump converts to ICD-9-CM V53.91 (fit/adjust insulin pump) and V65.46 (insulin pump training). The mapping is approximate, so confirm the match fits the documentation.