Z45.321 — Encounter for adjustment and management of cochlear device
Is Z45.321 billable?
Yes — Z45.321 is billable for FY2027. Z45.321 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. Z45.321 may be submitted for encounters from October 1, 2026 through September 30, 2027.
Z45.321 at a glance
| Code | Z45.321 |
|---|---|
| Description | Encounter for adjustment and management of cochlear device |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does Z45.321 group to?
Z45.321 sits in MDC 03 and helps define the logic of 3 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 154Other Ear, Nose, Mouth and Throat Diagnoses with MCCmedical
- 155Other Ear, Nose, Mouth and Throat Diagnoses with CCmedical
- 156Other Ear, Nose, Mouth and Throat Diagnoses without CC/MCCmedical
How is Z45.321 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to Z45.321. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Management › cochlear device (of)
- Admission › adjustment › device NEC › implanted › hearing device › cochlear (for)
Excludes1 — never code together — inherited from Z45
The conditions below can never be reported together with Z45.321 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
Excludes1 — never code together — inherited from Z45.32
The conditions below can never be reported together with Z45.321 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- Encounter for fitting and adjustment of hearing aid (Z46.1)
Excludes2 — not included here — inherited from Z40-Z53
The conditions below are not part of Z45.321, but a patient may have both at the same time. When documentation supports it, Z45.321 and the excluded code may both be reported.
- follow-up examination for medical surveillance after treatment (Z08-Z09)
Excludes2 — not included here — inherited from Z45
The conditions below are not part of Z45.321, but a patient may have both at the same time. When documentation supports it, Z45.321 and the excluded code may both be reported.
- encounter for fitting and adjustment of non-implanted device (Z46.-)
How long has Z45.321 existed?
Z45.321 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.