ICD-10-PCS 2027 procedure code
BN201ZZComputerized Tomography (CT Scan) of Skull using Low Osmolar Contrast
Short description: CT Scan of Skull using L Osm Contrast
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 BN201ZZ
BN201ZZ is the ICD-10-PCS code for a computerized tomography (CT scan) procedure on the skull using a low osmolar approach with none (qualifier: none). In ICD-10-PCS, computerized tomography (CT scan) means computer reformatted digital display of multiplanar images developed from the capture of multiple exposures of external ionizing radiation.
In plain terms, this corresponds to computerized axial tomography of head, the ICD-9-CM procedure title it maps to (87.03).
For a different body part, codes include BN231ZZ (bilateral orbits), BN251ZZ (facial bones), BN261ZZ (mandible), BN291ZZ (bilateral temporomandibular joints) and BN2F1ZZ (temporal bones).
The same procedure with a different approach is coded BN200ZZ (high osmolar), BN20YZZ (other contrast) and BN20ZZZ (none).
It doesn't appear in the MS-DRG procedure index, so on its own it doesn't change the DRG assignment.
It has been valid since ICD-10-PCS took effect on October 1, 2015.
What each character means
- 1. Section
- BImaging
- 2. Body System
- NSkull and Facial Bones
- 3. Type
- 2Computerized Tomography (CT Scan)
Computer reformatted digital display of multiplanar images developed from the capture of multiple exposures of external ionizing radiation
- 4. Body Part
- 0Skull
- 5. Contrast
- 1Low Osmolar
- 6. Qualifier
- ZNone
- 7. Qualifier
- ZNone
Other versions of this procedure
ICD-9-CM equivalent
Converter →- 87.03Computerized axial tomography of headapproximate
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 BN201ZZ
Is BN201ZZ a valid ICD-10-PCS code for 2027?
- Yes. BN201ZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.
What is the ICD-9 procedure code for BN201ZZ?
- The CMS GEMs map BN201ZZ to ICD-9-CM 87.03 (Computerized axial tomography of head).