ICD-10-PCS 2027 procedure code
BT231ZZComputerized Tomography (CT Scan) of Bilateral Kidneys using Low Osmolar Contrast
Short description: CT Scan of Bi Kidney 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 BT231ZZ
BT231ZZ is the ICD-10-PCS code for a computerized tomography (CT scan) procedure on the bilateral kidneys 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 kidney, the ICD-9-CM procedure title it maps to (87.71).
For a different body part, codes include BT201ZZ (bladder), BT211ZZ (right kidney), BT221ZZ (left kidney) and BT291ZZ (kidney transplant).
The same procedure with a different approach is coded BT230ZZ (high osmolar), BT23YZZ (other contrast) and BT23ZZZ (none).
With a different device, use BT2310Z (unenhanced and enhanced).
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
- TUrinary System
- 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
- 3Kidneys, Bilateral
- 5. Contrast
- 1Low Osmolar
- 6. Qualifier
- ZNone
- 7. Qualifier
- ZNone
Other versions of this procedure
Different contrast
Different qualifier
ICD-9-CM equivalent
Converter →- 87.71Computerized axial tomography of kidneyapproximate
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 BT231ZZ
Is BT231ZZ a valid ICD-10-PCS code for 2027?
- Yes. BT231ZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.
What is the ICD-9 procedure code for BT231ZZ?
- The CMS GEMs map BT231ZZ to ICD-9-CM 87.71 (Computerized axial tomography of kidney).