B23 Magnetic Resonance Imaging (MRI) - Heart ICD-10-PCS
The B23 code range contains 10 ICD-10-PCS codes for Magnetic Resonance Imaging (MRI) procedures on the heart. 9 of the codes are billable and valid for inpatient claim submission in fiscal year 2026.
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.
Codes in the B23 Range 10 codes · 9 billable
- B23 Imaging, Heart, Magnetic Resonance Imaging (MRI)Non-billable header
- B231Y0Z Magnetic Resonance Imaging (MRI) of Multiple Coronary Arteries using Other Contrast, Unenhanced and Enhanced
- B231YZZ Magnetic Resonance Imaging (MRI) of Multiple Coronary Arteries using Other Contrast
- B231ZZZ Magnetic Resonance Imaging (MRI) of Multiple Coronary Arteries
- B233Y0Z Magnetic Resonance Imaging (MRI) of Multiple Coronary Artery Bypass Grafts using Other Contrast, Unenhanced and Enhanced
- B233YZZ Magnetic Resonance Imaging (MRI) of Multiple Coronary Artery Bypass Grafts using Other Contrast
- B233ZZZ Magnetic Resonance Imaging (MRI) of Multiple Coronary Artery Bypass Grafts
- B236Y0Z Magnetic Resonance Imaging (MRI) of Right and Left Heart using Other Contrast, Unenhanced and Enhanced
- B236YZZ Magnetic Resonance Imaging (MRI) of Right and Left Heart using Other Contrast
- B236ZZZ Magnetic Resonance Imaging (MRI) of Right and Left Heart
About the B23 Code Range
The ICD-10-PCS root operation Magnetic Resonance Imaging (MRI) (B23) refers to producing detailed images of body parts using magnetic resonance technology. This operation belongs to the Imaging section and is instrumental for noninvasively visualizing internal anatomy.
Within this classification, MRI of the Heart is specifically coded to reflect various targets and contrast usage. For example, codes such as B231ZZZ and B233ZZZ denote MRI procedures of Multiple Coronary Arteries and Multiple Coronary Artery Bypass Grafts, respectively, without contrast enhancement. Meanwhile, codes like B231Y0Z and B233Y0Z specify MRIs with other contrast agents, either unenhanced or enhanced. Additionally, MRI of the Right and Left Heart is captured by codes such as B236ZZZ and B236Y0Z, depending on contrast use. These distinctions enable precise documentation of cardiac MRI studies, supporting accurate reporting and clinical correlation.
Questions About This Page
How many billable codes are in the B23 range?
Of the 10 codes in this range, 9 are billable and valid for inpatient claim submission from October 1, 2025 through September 30, 2026. Table header codes group them but cannot be reported on claims.
What does the B23 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 heart. Each code adds the body part, approach, device, and qualifier in characters four through seven, and links to its own reference page.
Related References
Source: CMS FY 2026 ICD-10-PCS order file and code tables, effective October 1, 2025 through September 30, 2026.
