ICD-10-CM 2027
ICD-10 code for cochlear device implanted management
From the official ICD-10-CM alphabetic index entry “Management (of) › cochlear device (implanted)”. Page updated September 29, 2026.
About coding cochlear device implanted management
The ICD-10-CM code for cochlear device implanted management is Z45.321 (Encounter for adjustment and management of cochlear device).
Within Z45.32 (encounter for adjustment and management of implanted hearing device), Z45.321 is specifically for encounter for adjustment and management of cochlear device. Related codes cover bone conduction device (Z45.320) and other implanted hearing device (Z45.328).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 154 (Other Ear, Nose, Mouth and Throat Diagnoses with MCC, relative weight 1.5921), DRG 155 (Other Ear, Nose, Mouth and Throat Diagnoses with CC, relative weight 0.9322) and DRG 156 (Other Ear, Nose, Mouth and Throat Diagnoses without CC/MCC, relative weight 0.6659), in MDC 03 (Diseases and Disorders of the Ear, Nose, Mouth and Throat), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about cochlear device implanted management ICD-10 codes
What is the ICD-10 code for cochlear device implanted management?
- Z45.321 — Encounter for adjustment and management of cochlear device.
Is Z45.321 billable?
- Yes. Z45.321 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Z45.321 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict Z45.321 as a principal diagnosis.
Is Z45.321 a CC or MCC?
- No. Z45.321 is neither a CC nor an MCC under MS-DRG v44.0.