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ICD-10-PCS 2027 procedure code

BW291ZZComputerized Tomography (CT Scan) of Head and Neck using Low Osmolar Contrast

✓ Valid for 2027

Short description: CT Scan of Head & Neck 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 BW291ZZ

BW291ZZ is the ICD-10-PCS code for a computerized tomography (CT scan) procedure on the head and neck 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 other tomography of head, the ICD-9-CM procedure title it maps to (87.04).

For a different body part, codes include BW201ZZ (abdomen), BW211ZZ (abdomen and pelvis), BW241ZZ (chest and abdomen), BW251ZZ (chest, abdomen and pelvis), BW281ZZ (head), BW2F1ZZ (neck) and 1 more.

The same procedure with a different approach is coded BW290ZZ (high osmolar), BW29YZZ (other contrast) and BW29ZZZ (none).

With a different device, use BW2910Z (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
WAnatomical Regions
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
9Head and Neck
5. Contrast
1Low Osmolar
6. Qualifier
ZNone
7. Qualifier
ZNone

Other versions of this procedure

ICD-9-CM equivalent

Converter →
  • 87.04Other 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 BW291ZZ

Is BW291ZZ a valid ICD-10-PCS code for 2027?

Yes. BW291ZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

What is the ICD-9 procedure code for BW291ZZ?

The CMS GEMs map BW291ZZ to ICD-9-CM 87.04 (Other tomography of head).