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ICD-10-PCS 2027 procedure code

0NH64SZInsertion of Hearing Device into Left Temporal Bone, Percutaneous Endoscopic Approach

✓ Valid for 2027O.R. procedure

Short description: Insert of Hear Dev into L Temporal Bone, Perc Endo Approach

Code unchanged since ICD-10-PCS took effect on October 1, 2015. Source: official FY2027 ICD-10-PCS release from CMS. Page updated September 29, 2026. About our data

About 0NH64SZ

0NH64SZ is the ICD-10-PCS code for a insertion procedure on the left temporal bone using a percutaneous endoscopic approach with hearing device. In ICD-10-PCS, insertion means putting in a nonbiological appliance that monitors, assists, performs, or prevents a physiological function but does not physically take the place of a body part.

In plain terms, this corresponds to implantation of electromagnetic hearing device, the ICD-9-CM procedure title it maps to (20.95).

For a different body part, codes include 0NH54SZ (right temporal bone).

The same procedure with a different approach is coded 0NH60SZ (open) and 0NH63SZ (percutaneous).

With a different device, use 0NH644Z (internal fixation device).

It is an operating-room procedure in the MS-DRG logic for DRG 143 (Other Ear, Nose, Mouth and Throat O.R. Procedures with MCC), DRG 144 (Other Ear, Nose, Mouth and Throat O.R. Procedures with CC) and DRG 145 (Other Ear, Nose, Mouth and Throat O.R. Procedures without CC/MCC), under the surgical category “Other Ear, Nose, Mouth and Throat O.R. Procedures”.

It has been valid since ICD-10-PCS took effect on October 1, 2015.

What each character means

1. Section
0Medical and Surgical
2. Body System
NHead and Facial Bones
3. Operation
HInsertion

Putting in a nonbiological appliance that monitors, assists, performs, or prevents a physiological function but does not physically take the place of a body part

Includes: Insertion of radioactive implant, insertion of central venous catheter

4. Body Part
6Temporal Bone, Left

Includes: Mastoid process; Petrous part of temporal bone; Tympanic part of temporal bone; Zygomatic process of temporal bone

5. Approach
4Percutaneous Endoscopic

Entry, by puncture or minor incision, of instrumentation through the skin or mucous membrane and any other body layers necessary to reach and visualize the site of the procedure

6. Device
SHearing Device
7. Qualifier
ZNo Qualifier

Other versions of this procedure

Different body part

MS-DRG v44.0 grouping

All DRGs →

Surgical MS-DRGs this procedure can group to, depending on the principal diagnosis's MDC.

ICD-9-CM equivalent

Converter →
  • 20.95Implantation of electromagnetic hearing deviceapproximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about 0NH64SZ

Is 0NH64SZ a valid ICD-10-PCS code for 2027?

Yes. 0NH64SZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 0NH64SZ an O.R. procedure?

Yes. 0NH64SZ is an O.R. procedure in MS-DRG v44.0.

What DRG does 0NH64SZ group to?

Depending on the principal diagnosis, 0NH64SZ can group to MS-DRG 143, MS-DRG 144 and MS-DRG 145.

What is the ICD-9 procedure code for 0NH64SZ?

The CMS GEMs map 0NH64SZ to ICD-9-CM 20.95 (Implantation of electromagnetic hearing device).