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ICD-10-PCS 2027 procedure code

BN231ZZComputerized Tomography (CT Scan) of Bilateral Orbits using Low Osmolar Contrast

✓ Valid for 2027

Short description: CT Scan of Bi Orbit 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 BN231ZZ

BN231ZZ is the ICD-10-PCS code for a computerized tomography (CT scan) procedure on the bilateral orbits 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 BN201ZZ (skull), BN251ZZ (facial bones), BN261ZZ (mandible), BN291ZZ (bilateral temporomandibular joints) and BN2F1ZZ (temporal bones).

The same procedure with a different approach is coded BN230ZZ (high osmolar), BN23YZZ (other contrast) and BN23ZZZ (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
3Orbits, Bilateral
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

  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 BN231ZZ

Is BN231ZZ a valid ICD-10-PCS code for 2027?

Yes. BN231ZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

What is the ICD-9 procedure code for BN231ZZ?

The CMS GEMs map BN231ZZ to ICD-9-CM 87.03 (Computerized axial tomography of head).