ICD-10-PCS 2027 procedure code
09NR4ZZRelease Left Maxillary Sinus, Percutaneous Endoscopic Approach
Short description: Release Left Maxillary Sinus, 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 09NR4ZZ
09NR4ZZ is the ICD-10-PCS code for a release procedure on the left maxillary sinus using a percutaneous endoscopic 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 repair of nasal sinus, the ICD-9-CM procedure title it maps to (22.79).
For a different body part, codes include 09N04ZZ (right external ear), 09N14ZZ (left external ear), 09N34ZZ (right external auditory canal), 09N44ZZ (left external auditory canal), 09N74ZZ (right tympanic membrane), 09N84ZZ (left tympanic membrane) and 16 more.
The same procedure with a different approach is coded 09NR0ZZ (open), 09NR3ZZ (percutaneous) and 09NR8ZZ (via natural or artificial opening endoscopic).
It is an operating-room procedure in the MS-DRG logic for DRG 135 (Sinus and Mastoid Procedures with CC/MCC) and DRG 136 (Sinus and Mastoid Procedures without CC/MCC), under the surgical category “Sinus and Mastoid 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
- RMaxillary Sinus, Left
Includes: Antrum of Highmore
- 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
- ZNo Device
- 7. Qualifier
- ZNo Qualifier
Other versions of this procedure
Different body part
- 09N04ZZExternal Ear, Right
- 09N14ZZExternal Ear, Left
- 09N34ZZExternal Auditory Canal, Right
- 09N44ZZExternal Auditory Canal, Left
- 09N74ZZTympanic Membrane, Right
- 09N84ZZTympanic Membrane, Left
- 09NB4ZZMastoid Sinus, Right
- 09NC4ZZMastoid Sinus, Left
- 09NF4ZZEustachian Tube, Right
- 09NG4ZZEustachian Tube, Left
- 09NK4ZZNasal Mucosa and Soft Tissue
- 09NL4ZZNasal Turbinate
MS-DRG v44.0 grouping
All DRGs →Surgical MS-DRGs this procedure can group to, depending on the principal diagnosis's MDC.
MDC 03 · Diseases and Disorders of the Ear, Nose, Mouth and Throat · Sinus and Mastoid Procedures
ICD-9-CM equivalent
Converter →- 22.79Other repair of nasal sinusapproximate
From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about 09NR4ZZ
Is 09NR4ZZ a valid ICD-10-PCS code for 2027?
- Yes. 09NR4ZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.
Is 09NR4ZZ an O.R. procedure?
- Yes. 09NR4ZZ is an O.R. procedure in MS-DRG v44.0.
What DRG does 09NR4ZZ group to?
- Depending on the principal diagnosis, 09NR4ZZ can group to MS-DRG 135 and MS-DRG 136.
What is the ICD-9 procedure code for 09NR4ZZ?
- The CMS GEMs map 09NR4ZZ to ICD-9-CM 22.79 (Other repair of nasal sinus).