2027 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 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

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 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 951. 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 the other POA exempt codes in Encounters for other specific health care (Z40-Z53).

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Chewing finding
  • Finding related to ability to chew
  • Orthodontic appliance finding
  • 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
  • Unable to chew
  • Unable to chew with orthodontic appliance
  • Unable to eat
  • Unable to eat with orthodontic appliance
  • Unable to wear orthodontic appliance

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to Z46.4: its own notes plus those printed at Z46, block Z40-Z53, and Chapter 21. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

From Z46 Encounter for fitting and adjustment of other devices applies to 12 codes
  • removal or replacement of other device

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From Z46 Encounter for fitting and adjustment of other devices applies to 12 codes
  • malfunction or other complications of device - see Alphabetical Index

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Z46 Encounter for fitting and adjustment of other devices applies to 12 codes
  • encounter for fitting and management of implanted devices (Z45.-)
  • issue of repeat prescription only (Z76.0)
  • presence of prosthetic and other devices (Z95-Z97)
From Block Z40-Z53 Encounters for other specific health care applies to 164 codes
  • follow-up examination for medical surveillance after treatment (Z08-Z09)

Notes

General instructions on how these codes are used.

From Chapter 21 (Z00-Z99) Factors influencing health status and contact with health services applies to 1,425 codes
  • Z codes represent reasons for encounters. A corresponding procedure code must accompany a Z code if a procedure is performed. Categories Z00-Z99 are provided for occasions when circumstances other than a disease, injury or external cause classifiable to categories A00-Y89 are recorded as 'diagnoses' or 'problems'. This can arise in two main ways:
  • (a) When a person who may or may not be sick encounters the health services for some specific purpose, such as to receive limited care or service for a current condition, to donate an organ or tissue, to receive prophylactic vaccination (immunization), or to discuss a problem which is in itself not a disease or injury.
  • (b) When some circumstance or problem is present which influences the person's health status but is not in itself a current illness or injury.

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name Z46.4, its category, or a range that includes it.

Excludes1 1

These codes carry an Excludes1 note naming Z46.4: they are not reported together with it, unless the two conditions are unrelated.

  • Z09 Encounter for follow-up examination after completed treatment for conditions other than malignant neoplasm
    surveillance of prosthetic and other medical devices (Z44-Z46) names Z44-Z46, which includes this code

Excludes2 5

These codes carry an Excludes2 note naming Z46.4: its condition is not part of those codes, and both may be reported when the patient has both.

  • Z45 Encounter for adjustment and management of implanted device
    encounter for fitting and adjustment of non-implanted device (Z46.-) names Z46.-, which includes this code
  • Z43 Encounter for attention to artificial openings
    fitting and adjustment of prosthetic and other devices (Z44-Z46) names Z44-Z46, which includes this code
  • Z48 Encounter for other postprocedural aftercare
    encounter for fitting and adjustment of prosthetic and other devices (Z44-Z46) names Z44-Z46, which includes this code
  • Z96 Presence of other functional implants
    fitting and adjustment of prosthetic and other devices (Z44-Z46) names Z44-Z46, which includes this code
  • Z97 Presence of other devices
    fitting and adjustment of prosthetic and other devices (Z44-Z46) names Z44-Z46, which includes this code

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About Z46.4Overview

What is the ICD-10 code for encounter for fitting and adjustment of orthodontic device?

The ICD-10-CM code for encounter for fitting and adjustment of orthodontic device is Z46.4 (sometimes written as Z464). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

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, 2026 through September 30, 2027.

What MS-DRG does Z46.4 group to?

On inpatient claims, encounter for fitting and adjustment of orthodontic device maps to MS-DRG 951 (other Factors Influencing Health Status), which carries a relative weight of 0.5574. Higher weights mean higher Medicare reimbursement.

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. The code appears in the Encounters for other specific health care (Z40-Z53) range of the CMS exempt list.