2026 ICD-10-CM Diagnosis Code Z46.4Encounter for fitting and adjustment of orthodontic device

ICD-10-CM Codes›Z00–Z99›Z40-Z53›Z46

ICD-10-CM Z46.4
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Z46.4 is a billable ICD-10-CM diagnosis code for encounter for fitting and adjustment of orthodontic device. 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 Any dental condition including traumatic injury; Caries, periodontitis, and other preventable dental conditions; and Implant, device or graft related encounter.

Code Identity

ICD-10-CM Code
Z46.4
Billable Status
Yes — Valid for Submission
Code Describes
Encounter for fitting and adjustment of orthodontic device
Short Description
Encounter for fitting and adjustment of orthodontic device
Same as the full description in the CMS dataset.
Parent Code
Z46
Encounter for fitting and adjustment of other 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 CodeZ46.4Encounter for fitting and adjustment of orthodontic device

Code EditsBilling

Medicare Code Editor checks that affect claim validity for Z46.4.

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

Z46.4 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.

  • Requires fixed orthodontic appliance
  • Requires functional orthodontic appliance
  • Requires hard occlusal appliance
  • Requires lower fixed orthodontic appliance
  • Requires lower orthodontic retainer
  • Requires lower removable orthodontic appliance
  • Requires orthodontic retainer
  • Requires removable orthodontic appliance
  • Requires soft occlusal appliance
  • Requires upper fixed orthodontic appliance
  • Requires upper orthodontic retainer
  • Requires upper removable orthodontic appliance

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.

    • Admission(for)
      • adjustment (of)
        • device NEC
          • orthodontic
    • Admission(for)
      • adjustment (of)
        • orthodontic device
    • Admission(for)
      • fitting (of)
        • device NEC
          • orthodontic
    • Admission(for)
      • fitting (of)
        • orthodontic device
    • Encounter(with health service) (for)
      • removal (of)
        • orthodontic device
    • Fitting(and adjustment) (of)
      • device NOS
        • orthodontic
    • Fitting(and adjustment) (of)
      • orthodontic device
    • Orthodontics
      • adjustment
    • Orthodontics
      • fitting
    • Removal(from) (of)
      • orthodontic device

Clinical ClassificationClinical

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

CCSR DEN001
Any dental condition including traumatic injury
Default principal diagnosis: inpatient No · outpatient No
CCSR DEN003
Caries, periodontitis, and other preventable dental conditions
Default principal diagnosis: inpatient No · outpatient No
CCSR FAC009
Implant, device or graft related encounter
Default principal diagnosis: inpatient No · outpatient Yes
CCSR DEN002
Nontraumatic dental conditions
Default principal diagnosis: inpatient No · outpatient No

Patient EducationClinical

Orthodontia

Some people have naturally straight teeth that fit together. But if you have problems with your bite or the spacing of your teeth, you may need orthodontic care. Orthodontia is the branch of dentistry that deals with abnormalities of the teeth and jaw.

Read the full article at MedlinePlus

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

Convert Z46.4 to ICD-9-CMHistory

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

ICD-9-CM
V53.4 Fit orthodontic device
Approximate The match is approximate rather than exact.
ICD-9-CM
V58.5 Orthodontics aftercare
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 Z46.4Overview

Is Z46.4 (Encounter for fitting and adjustment of other devices) a billable code?

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

Can Z46.4 be a principal diagnosis?

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

Is Z46.4 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 orthodontic device on inpatient claims.

What is the ICD-9 equivalent of Z46.4?

Under the General Equivalence Mappings, encounter for fitting and adjustment of orthodontic device converts to ICD-9-CM V53.4 (fit orthodontic device) and V58.5 (orthodontics aftercare). The mapping is approximate, so confirm the match fits the documentation.