ICD-10-PCS Code For Thoracic Aorta: Procedure Code Group Overview

The International Classification of Diseases, Tenth Revision, Procedure Coding System (ICD-10-PCS) code group B320 includes procedures performed to image structures in the thoracic aorta. These ICD-10-PCS codes are used for inpatient documentation when diagnostic evaluation of the thoracic aorta is performed using computerized tomography to generate multiplanar reformatted images. Accurate coding within the ICD-10-PCS B320 group is essential for proper inpatient reimbursement, as it captures the diagnostic imaging procedure performed and supports clinical documentation accuracy.

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Thoracic Aorta Computerized Tomography Procedure Overview

This group includes computerized tomography imaging procedures of the thoracic aorta that produce reformatted multiplanar digital images from multiple exposures of external ionizing radiation. These procedures target the upper arterial system specifically the thoracic aorta and are used to evaluate anatomy and pathology such as aneurysm, dissection, stenosis, or postoperative changes. Accurate coding ensures inpatient records reflect the diagnostic imaging performed and supports appropriate case mix classification and reimbursement.

Code Attributes

Character	ICD-10-PCS Category	Code Group Details
B	Section	Imaging
3	Body System	Upper Arteries
2	Operation	Computerized Tomography (CT Scan)
0	Body Part	Thoracic Aorta

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ICD-10-PCS Code For Thoracic Aorta: Procedure Code Group Overview

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Thoracic Aorta Computerized Tomography Procedure Overview

Code Attributes

Character	ICD-10-PCS Category	Code Group Details
B	Section	Imaging
3	Body System	Upper Arteries
2	Operation	Computerized Tomography (CT Scan)
0	Body Part	Thoracic Aorta

When to Use

Use a code from this group when inpatient computerized tomography of the thoracic aorta is performed to obtain multiplanar reformatted images for diagnosis or surveillance. Typical clinical scenarios include evaluation of suspected or known aortic aneurysm, dissection, stenosis, or postoperative assessment.

ICD-10-PCS Codes

5 rows

ICD-10-PCS Code	Description
B3200ZZ	Computerized Tomography (CT Scan) of Thoracic Aorta using High Osmolar Contrast
B3201ZZ	Computerized Tomography (CT Scan) of Thoracic Aorta using Low Osmolar Contrast
B320YZZ	Computerized Tomography (CT Scan) of Thoracic Aorta using Other Contrast
B320Z2Z	Computerized Tomography (CT Scan) of Thoracic Aorta using Intravascular Optical Coherence
B320ZZZ	Computerized Tomography (CT Scan) of Thoracic Aorta

Typical Clinical Scenarios

An elderly patient with sudden onset severe chest pain and unequal blood pressures in the arms is admitted emergently with suspected acute thoracic aortic dissection; rapid inpatient imaging is required to delineate intimal flap, extent of dissection, and involvement of branch vessels to guide urgent surgical or endovascular management. A CT scan producing reformatted multiplanar images of the thoracic aorta with intravascular contrast is performed to evaluate the acute pathology. Typical codes: B3200ZZ, B3201ZZ
A middle-aged patient with a known ascending aortic aneurysm is admitted for preoperative evaluation prior to elective aortic repair; inpatient imaging is done to measure aneurysm size, morphology, and relation to surrounding structures for operative planning. Multiplanar CT imaging of the thoracic aorta with low osmolar intravenous contrast is obtained to provide high-resolution reformatted images for surgical decision-making. Typical codes: B3201ZZ
A postoperative patient following thoracic endovascular aortic repair (TEVAR) is admitted with new onset chest pain and concern for endoleak or graft complication; inpatient CT with multiplanar reformatting is performed to detect endoleak, graft migration, or new dissection and to guide potential reintervention. Typical codes: B3200ZZ, B320YZZ

ICD-10-PCS Code For Common Carotid Arteries: Procedure Code Group Overview

B328-INTERNAL-CAROTID-ARTERIES-COMPUTERIZED-TOMOGRAPHY

ICD-10-PCS Code For Internal Carotid Arteries: Procedure Code Group Overview

B32G-VERTEBRAL-ARTERIES-COMPUTERIZED-TOMOGRAPHY

ICD-10-PCS Code For Vertebral Arteries: Procedure Code Group Overview

B32R-INTRACRANIAL-ARTERIES-COMPUTERIZED-TOMOGRAPHY

ICD-10-PCS Code For Intracranial Arteries: Procedure Code Group Overview

B32S-PULMONARY-ARTERY-COMPUTED-TOMOGRAPHY

ICD-10-PCS Code For Pulmonary Artery, Right: Procedure Code Group Overview

B32T-PULMONARY-ARTERY-LEFT-COMPUTERIZED-TOMOGRAPHY

ICD-10-PCS Code For Pulmonary Artery, Left: Procedure Code Group Overview

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

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When to Use

ICD-10-PCS Codes

5 rows

ICD-10-PCS Code	Description
B3200ZZ	Computerized Tomography (CT Scan) of Thoracic Aorta using High Osmolar Contrast
B3201ZZ	Computerized Tomography (CT Scan) of Thoracic Aorta using Low Osmolar Contrast
B320YZZ	Computerized Tomography (CT Scan) of Thoracic Aorta using Other Contrast
B320Z2Z	Computerized Tomography (CT Scan) of Thoracic Aorta using Intravascular Optical Coherence
B320ZZZ	Computerized Tomography (CT Scan) of Thoracic Aorta

Typical Clinical Scenarios

An elderly patient with sudden onset severe chest pain and unequal blood pressures in the arms is admitted emergently with suspected acute thoracic aortic dissection; rapid inpatient imaging is required to delineate intimal flap, extent of dissection, and involvement of branch vessels to guide urgent surgical or endovascular management. A CT scan producing reformatted multiplanar images of the thoracic aorta with intravascular contrast is performed to evaluate the acute pathology. Typical codes: B3200ZZ, B3201ZZ
A middle-aged patient with a known ascending aortic aneurysm is admitted for preoperative evaluation prior to elective aortic repair; inpatient imaging is done to measure aneurysm size, morphology, and relation to surrounding structures for operative planning. Multiplanar CT imaging of the thoracic aorta with low osmolar intravenous contrast is obtained to provide high-resolution reformatted images for surgical decision-making. Typical codes: B3201ZZ
A postoperative patient following thoracic endovascular aortic repair (TEVAR) is admitted with new onset chest pain and concern for endoleak or graft complication; inpatient CT with multiplanar reformatting is performed to detect endoleak, graft migration, or new dissection and to guide potential reintervention. Typical codes: B3200ZZ, B320YZZ

ICD-10-PCS Code For Common Carotid Arteries: Procedure Code Group Overview

B328-INTERNAL-CAROTID-ARTERIES-COMPUTERIZED-TOMOGRAPHY

ICD-10-PCS Code For Internal Carotid Arteries: Procedure Code Group Overview

B32G-VERTEBRAL-ARTERIES-COMPUTERIZED-TOMOGRAPHY

ICD-10-PCS Code For Vertebral Arteries: Procedure Code Group Overview

B32R-INTRACRANIAL-ARTERIES-COMPUTERIZED-TOMOGRAPHY

ICD-10-PCS Code For Intracranial Arteries: Procedure Code Group Overview

B32S-PULMONARY-ARTERY-COMPUTED-TOMOGRAPHY

ICD-10-PCS Code For Pulmonary Artery, Right: Procedure Code Group Overview

B32T-PULMONARY-ARTERY-LEFT-COMPUTERIZED-TOMOGRAPHY

ICD-10-PCS Code For Pulmonary Artery, Left: Procedure Code Group Overview

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

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Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

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ICD-10-PCS Code For Thoracic Aorta: Procedure Code Group Overview

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Thoracic Aorta Computerized Tomography Procedure Overview

Code Attributes

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ICD-10-PCS Code For Thoracic Aorta: Procedure Code Group Overview

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Thoracic Aorta Computerized Tomography Procedure Overview

Code Attributes

When to Use

ICD-10-PCS Codes

Typical Clinical Scenarios

Related Codes

References

When to Use

ICD-10-PCS Codes

Typical Clinical Scenarios

Related Codes

References

ICD-10-PCS Code For Thoracic Aorta: Procedure Code Group Overview

Sign up for ICD-10-PCS Code For Thoracic Aorta: Procedure Code Group Overview policy alerts

Thoracic Aorta Computerized Tomography Procedure Overview

Code Attributes

ICD-10-PCS Code For Thoracic Aorta: Procedure Code Group Overview

Sign up for ICD-10-PCS Code For Thoracic Aorta: Procedure Code Group Overview policy alerts

Thoracic Aorta Computerized Tomography Procedure Overview

Code Attributes

When to Use

ICD-10-PCS Codes

Typical Clinical Scenarios

Related Codes

Which procedures are included in the ICD-10-PCS B320 group?

What is the primary purpose of procedures in the Thoracic Aorta CT (B320) group?

Under which ICD-10-PCS section and body system are B320 codes classified?

How do B320 codes affect inpatient documentation and reimbursement?

What differentiates the individual codes within the B320 group?

References

When to Use

ICD-10-PCS Codes

Typical Clinical Scenarios

Related Codes

Which procedures are included in the ICD-10-PCS B320 group?

What is the primary purpose of procedures in the Thoracic Aorta CT (B320) group?

Under which ICD-10-PCS section and body system are B320 codes classified?

How do B320 codes affect inpatient documentation and reimbursement?

What differentiates the individual codes within the B320 group?

References