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ICD-10-PCS 2027 procedure code

09N77ZZRelease Right Tympanic Membrane, Via Natural or Artificial Opening

✓ Valid for 2027O.R. procedure

Short description: Release Right Tympanic Membrane, Via Opening

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 09N77ZZ

09N77ZZ is the ICD-10-PCS code for a release procedure on the right tympanic membrane using a via natural or artificial opening approach. In ICD-10-PCS, release means freeing a body part from an abnormal physical constraint by cutting or by the use of force.

In plain terms, this corresponds to other operations on middle and inner ear, the ICD-9-CM procedure title it maps to (20.99).

For a different body part, codes include 09N37ZZ (right external auditory canal), 09N47ZZ (left external auditory canal), 09N87ZZ (left tympanic membrane), 09NF7ZZ (right eustachian tube), 09NG7ZZ (left eustachian tube), 09NL7ZZ (nasal turbinate) and 1 more.

The same procedure with a different approach is coded 09N70ZZ (open), 09N73ZZ (percutaneous), 09N74ZZ (percutaneous endoscopic) and 09N78ZZ (via natural or artificial opening endoscopic).

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
9Ear, Nose, Sinus
3. Operation
NRelease

Freeing a body part from an abnormal physical constraint by cutting or by the use of force

Some of the restraining tissue may be taken out but none of the body part is taken out

Includes: Adhesiolysis, carpal tunnel release

4. Body Part
7Tympanic Membrane, Right
5. Approach
7Via Natural or Artificial Opening

Entry of instrumentation through a natural or artificial external opening to reach the site of the procedure

6. Device
ZNo Device
7. Qualifier
ZNo Qualifier

Other versions of this procedure

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 →
  • 20.99Other operations on middle and inner earapproximate

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 09N77ZZ

Is 09N77ZZ a valid ICD-10-PCS code for 2027?

Yes. 09N77ZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 09N77ZZ an O.R. procedure?

Yes. 09N77ZZ is an O.R. procedure in MS-DRG v44.0.

What DRG does 09N77ZZ group to?

Depending on the principal diagnosis, 09N77ZZ can group to MS-DRG 143, MS-DRG 144 and MS-DRG 145.

What is the ICD-9 procedure code for 09N77ZZ?

The CMS GEMs map 09N77ZZ to ICD-9-CM 20.99 (Other operations on middle and inner ear).