ICD-10-PCS Tabular Index · Section B · FY 2027 B33

B33 Magnetic Resonance Imaging (MRI) - Upper Arteries ICD-10-PCS

The B33 code range contains 31 ICD-10-PCS codes for Magnetic Resonance Imaging (MRI) procedures on the upper arteries. 30 of the codes are billable and valid for inpatient claim submission in fiscal year 2027.

✓ Built from the official CMS FY 2027 datasetEffective Oct 1, 2026 – Sep 30, 2027
31
Procedure Codes
30
Billable Codes
B33
Characters 1–3
B3
Parent Body System

Root Operation Definition

Magnetic Resonance Imaging (MRI): Computer reformatted digital display of multiplanar images developed from the capture of radio frequency signals emitted by nuclei in a body site excited within a magnetic field.

ICD-10-PCS

Codes in the B33 Range 31 codes · 30 billable

31 of 31 shown
  • B33 Imaging, Upper Arteries, Magnetic Resonance Imaging (MRI)Non-billable header
  • B330Y0Z Magnetic Resonance Imaging (MRI) of Thoracic Aorta using Other Contrast, Unenhanced and Enhanced
  • B330YZZ Magnetic Resonance Imaging (MRI) of Thoracic Aorta using Other Contrast
  • B330ZZZ Magnetic Resonance Imaging (MRI) of Thoracic Aorta
  • B335Y0Z Magnetic Resonance Imaging (MRI) of Bilateral Common Carotid Arteries using Other Contrast, Unenhanced and Enhanced
  • B335YZZ Magnetic Resonance Imaging (MRI) of Bilateral Common Carotid Arteries using Other Contrast
  • B335ZZZ Magnetic Resonance Imaging (MRI) of Bilateral Common Carotid Arteries
  • B338Y0Z Magnetic Resonance Imaging (MRI) of Bilateral Internal Carotid Arteries using Other Contrast, Unenhanced and Enhanced
  • B338YZZ Magnetic Resonance Imaging (MRI) of Bilateral Internal Carotid Arteries using Other Contrast
  • B338ZZZ Magnetic Resonance Imaging (MRI) of Bilateral Internal Carotid Arteries
  • B33GY0Z Magnetic Resonance Imaging (MRI) of Bilateral Vertebral Arteries using Other Contrast, Unenhanced and Enhanced
  • B33GYZZ Magnetic Resonance Imaging (MRI) of Bilateral Vertebral Arteries using Other Contrast
  • B33GZZZ Magnetic Resonance Imaging (MRI) of Bilateral Vertebral Arteries
  • B33HY0Z Magnetic Resonance Imaging (MRI) of Right Upper Extremity Arteries using Other Contrast, Unenhanced and Enhanced
  • B33HYZZ Magnetic Resonance Imaging (MRI) of Right Upper Extremity Arteries using Other Contrast
  • B33HZZZ Magnetic Resonance Imaging (MRI) of Right Upper Extremity Arteries
  • B33JY0Z Magnetic Resonance Imaging (MRI) of Left Upper Extremity Arteries using Other Contrast, Unenhanced and Enhanced
  • B33JYZZ Magnetic Resonance Imaging (MRI) of Left Upper Extremity Arteries using Other Contrast
  • B33JZZZ Magnetic Resonance Imaging (MRI) of Left Upper Extremity Arteries
  • B33KY0Z Magnetic Resonance Imaging (MRI) of Bilateral Upper Extremity Arteries using Other Contrast, Unenhanced and Enhanced
  • B33KYZZ Magnetic Resonance Imaging (MRI) of Bilateral Upper Extremity Arteries using Other Contrast
  • B33KZZZ Magnetic Resonance Imaging (MRI) of Bilateral Upper Extremity Arteries
  • B33MY0Z Magnetic Resonance Imaging (MRI) of Spinal Arteries using Other Contrast, Unenhanced and Enhanced
  • B33MYZZ Magnetic Resonance Imaging (MRI) of Spinal Arteries using Other Contrast
  • B33MZZZ Magnetic Resonance Imaging (MRI) of Spinal Arteries
  • B33QY0Z Magnetic Resonance Imaging (MRI) of Cervico-Cerebral Arch using Other Contrast, Unenhanced and Enhanced
  • B33QYZZ Magnetic Resonance Imaging (MRI) of Cervico-Cerebral Arch using Other Contrast
  • B33QZZZ Magnetic Resonance Imaging (MRI) of Cervico-Cerebral Arch
  • B33RY0Z Magnetic Resonance Imaging (MRI) of Intracranial Arteries using Other Contrast, Unenhanced and Enhanced
  • B33RYZZ Magnetic Resonance Imaging (MRI) of Intracranial Arteries using Other Contrast
  • B33RZZZ Magnetic Resonance Imaging (MRI) of Intracranial Arteries

About the B33 Code Range

These MRI procedures use a magnetic field and radiofrequency signals to make images of the thoracic aorta and arteries of the neck, head, arms and spine.

The fourth character names the artery or group of arteries. It distinguishes right, left and bilateral upper extremity arteries, as well as bilateral carotid and vertebral arteries. The fifth character records Other Contrast or None. The sixth records Unenhanced and Enhanced or None; the seventh is always None.

MR angiography is another name for this imaging of arteries.

Questions About This Page

How many billable codes are in the B33 range?

Of the 31 codes in this range, 30 are billable and valid for inpatient claim submission from October 1, 2026 through September 30, 2027. Table header codes group them but cannot be reported on claims.

What does the B33 range classify?

The range classifies Magnetic Resonance Imaging (MRI) procedures, computer reformatted digital display of multiplanar images developed from the capture of radio frequency signals emitted by nuclei in a body site excited within a magnetic field, performed on the upper arteries. Each code adds the body part, approach, device, and qualifier in characters four through seven, and links to its own reference page.

Related References

All ICD-10-PCS SectionsAll of Imaging (B)All of Body System B3ICD-10-PCS Code LookupICD-10-CM Codes ListMS-DRG ReferenceMedicare Code Edits

Source: CMS FY 2027 ICD-10-PCS order file and code tables, effective October 1, 2026 through September 30, 2027.