Z46.4 — Encounter for fitting and adjustment of orthodontic device

Billable

Is Z46.4 billable?

Yes — Z46.4 is billable for FY2027. Z46.4 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. Z46.4 may be submitted for encounters from October 1, 2026 through September 30, 2027.

Z46.4 at a glance

Code	Z46.4
Description	Encounter for fitting and adjustment of orthodontic device
Billable	Yes
Code set	ICD-10-CM FY2027
Valid for encounters	October 1, 2026 – September 30, 2027

What Medicare edits apply to Z46.4?

The Medicare Code Editor screens inpatient claims before they are grouped. These edits name Z46.4 directly.

Cannot be a principal diagnosis — MCE edit 9

CMS will reject this code as the principal diagnosis on an inpatient claim. It describes something other than the condition chiefly responsible for the admission.

Which MS-DRGs does Z46.4 group to?

Z46.4 sits in MDC 23 and helps define the logic of 1 MS-DRG (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.

951Other Factors Influencing Health Statusmedical

How is Z46.4 listed in the Alphabetic Index?

These are the routes through the Alphabetic Index that lead to Z46.4. They show the wording a clinician may have documented, which often differs from the Tabular description.

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

Excludes1 — never code together — inherited from Z46

The conditions below can never be reported together with Z46.4 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.

malfunction or other complications of device - see Alphabetical Index

Excludes2 — not included here — inherited from Z40-Z53

The conditions below are not part of Z46.4, but a patient may have both at the same time. When documentation supports it, Z46.4 and the excluded code may both be reported.

follow-up examination for medical surveillance after treatment (Z08-Z09)

Excludes2 — not included here — inherited from Z46

The conditions below are not part of Z46.4, but a patient may have both at the same time. When documentation supports it, Z46.4 and the excluded code may both be reported.

encounter for fitting and management of implanted devices (Z45.-)
issue of repeat prescription only (Z76.0)
presence of prosthetic and other devices (Z95-Z97)

How long has Z46.4 existed?

Z46.4 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.

Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.

Which conditions are coded to Z46.4?

ICD-10 code for Encounter