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ICD-10-PCS 2027 procedure code

B33RZZZMagnetic Resonance Imaging (MRI) of Intracranial Arteries

✓ Valid for 2027

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 B33RZZZ

B33RZZZ is the ICD-10-PCS code for a magnetic resonance imaging (MRI) procedure on the intracranial arteries using a none approach with none (qualifier: none). In ICD-10-PCS, magnetic resonance imaging (MRI) means computer reformatted digital display of multiplanar images developed from the capture of radiofrequency signals emitted by nuclei in a body site excited within a magnetic field.

In plain terms, this corresponds to magnetic resonance imaging of brain and brain stem, the ICD-9-CM procedure title it maps to (88.91).

For a different body part, codes include B330ZZZ (thoracic aorta), B335ZZZ (bilateral common carotid arteries), B338ZZZ (bilateral internal carotid arteries), B33GZZZ (bilateral vertebral arteries), B33HZZZ (right upper extremity arteries), B33JZZZ (left upper extremity arteries) and 3 more.

The same procedure with a different approach is coded B33RYZZ (other contrast).

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
3Upper Arteries
3. Type
3Magnetic Resonance Imaging (MRI)

Computer reformatted digital display of multiplanar images developed from the capture of radiofrequency signals emitted by nuclei in a body site excited within a magnetic field

4. Body Part
RIntracranial Arteries
5. Contrast
ZNone
6. Qualifier
ZNone
7. Qualifier
ZNone

Other versions of this procedure

Different contrast

ICD-9-CM equivalent

Converter →
  • 88.91Magnetic resonance imaging of brain and brain stemapproximate

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 B33RZZZ

Is B33RZZZ a valid ICD-10-PCS code for 2027?

Yes. B33RZZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

What is the ICD-9 procedure code for B33RZZZ?

The CMS GEMs map B33RZZZ to ICD-9-CM 88.91 (Magnetic resonance imaging of brain and brain stem).