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

The International Classification of Diseases, Tenth Revision, Procedure Coding System (ICD-10-PCS) code group 0370 includes procedures performed to dilate arterial structures in the right internal mammary artery. These ICD-10-PCS codes are used for inpatient documentation when a clinician performs an arterial dilation to expand the lumen of the right internal mammary artery to improve blood flow. Accurate coding within the ICD-10-PCS 0370 group is essential for proper inpatient reimbursement, as it captures the specific dilation procedure performed and determines appropriate case mix and payment.

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Internal Mammary Artery, Right Dilation Procedure Overview

Procedures in this group involve dilation of the right internal mammary artery within the upper arterial circulation to expand the vessel lumen and restore or improve blood flow. The targeted body system is the upper arteries, specifically the internal mammary artery on the right side. Accurate ICD-10-PCS coding ensures the inpatient record reflects the exact dilation procedure performed and supports appropriate case mix assignment and reimbursement.

Code Attributes

Character	ICD-10-PCS Category	Code Group Details
0	Section	Medical and Surgical
3	Body System	Upper Arteries
7	Operation	Dilation
0	Body Part	Internal Mammary Artery, Right

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

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Internal Mammary Artery, Right Dilation Procedure Overview

Code Attributes

Character	ICD-10-PCS Category	Code Group Details
0	Section	Medical and Surgical
3	Body System	Upper Arteries
7	Operation	Dilation
0	Body Part	Internal Mammary Artery, Right

When to Use

Use a code from this group when an intervention is performed to dilate the lumen of the right internal mammary artery during an inpatient encounter. These codes apply when the clinical intent is to restore or improve arterial blood flow through mechanical or catheter-based dilation of that vessel.

ICD-10-PCS Codes

33 rows

ICD-10-PCS Code	Description
037004Z	Dilation of Right Internal Mammary Artery with Drug-eluting Intraluminal Device, Open Approach
037005Z	Dilation of Right Internal Mammary Artery with Two Drug-eluting Intraluminal Devices, Open Approach
037006Z	Dilation of Right Internal Mammary Artery with Three Drug-eluting Intraluminal Devices, Open Approach
037007Z	Dilation of Right Internal Mammary Artery with Four or More Drug-eluting Intraluminal Devices, Open Approach
03700D1	Dilation of Right Internal Mammary Artery with Intraluminal Device, using Drug-Coated Balloon, Open Approach
03700DZ	Dilation of Right Internal Mammary Artery with Intraluminal Device, Open Approach
03700EZ	Dilation of Right Internal Mammary Artery with Two Intraluminal Devices, Open Approach
03700FZ	Dilation of Right Internal Mammary Artery with Three Intraluminal Devices, Open Approach
03700GZ	Dilation of Right Internal Mammary Artery with Four or More Intraluminal Devices, Open Approach
03700Z1	Dilation of Right Internal Mammary Artery using Drug-Coated Balloon, Open Approach

Showing 1–10 of 33

DRG Codes

3 rows

DRG Code	Description
252	Other Vascular Procedures with MCC
253	Other Vascular Procedures with CC
254	Other Vascular Procedures without CC/MCC

Typical Clinical Scenarios

An older patient with progressive angina undergoes preoperative coronary angiography demonstrating significant stenosis of the right internal mammary artery graft contributing to myocardial ischemia. A planned inpatient percutaneous dilation is performed using a drug-eluting stent to restore luminal diameter and improve graft flow as part of revascularization strategy. The goal is elective arterial dilation to relieve ischemia and reduce symptoms. Typical codes: 037034Z
A middle-aged patient presents emergently with acute chest pain and hemodynamic instability; angiography reveals an acute thrombosis with critical narrowing of the right internal mammary artery. An urgent percutaneous dilation is performed with balloon angioplasty and placement of a single intraluminal device without drug coating to rapidly restore perfusion. This immediate intervention addresses the acute loss of arterial blood flow. Typical codes: 03703DZ
A patient with prior stent placement in the right internal mammary artery returns with in-stent restenosis causing recurrent exertional angina. During an inpatient admission, percutaneous endoscopic revision is performed using a drug-coated balloon to dilate the restenotic segment and reduce neointimal hyperplasia without inserting an additional permanent device. The procedure targets lumen expansion within the previously treated artery. Typical codes: 03704D1

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

0372-INNOMINATE-ARTERY-DILATION

ICD-10-PCS Code For Innominate Artery: Procedure Code Group Overview

0373-SUBCLAVIAN-ARTERY-DILATION

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

0374-LEFT-SUBCLAVIAN-ARTERY-DILATION

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

0375-AXILLARY-ARTERY-DILATION

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

0376-AXILLARY-ARTERY-LEFT-DILATION

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

0377-BRACHIAL-ARTERY-RIGHT-DILATION

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

0378-LEFT-BRACHIAL-ARTERY-DILATION

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

0379-ULNAR-ARTERY-RIGHT-DILATION

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

037A-ULNAR-ARTERY-LEFT-DILATION

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

Showing 1–10 of 29

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

33 rows

ICD-10-PCS Code	Description
037004Z	Dilation of Right Internal Mammary Artery with Drug-eluting Intraluminal Device, Open Approach
037005Z	Dilation of Right Internal Mammary Artery with Two Drug-eluting Intraluminal Devices, Open Approach
037006Z	Dilation of Right Internal Mammary Artery with Three Drug-eluting Intraluminal Devices, Open Approach
037007Z	Dilation of Right Internal Mammary Artery with Four or More Drug-eluting Intraluminal Devices, Open Approach
03700D1	Dilation of Right Internal Mammary Artery with Intraluminal Device, using Drug-Coated Balloon, Open Approach
03700DZ	Dilation of Right Internal Mammary Artery with Intraluminal Device, Open Approach
03700EZ	Dilation of Right Internal Mammary Artery with Two Intraluminal Devices, Open Approach
03700FZ	Dilation of Right Internal Mammary Artery with Three Intraluminal Devices, Open Approach
03700GZ	Dilation of Right Internal Mammary Artery with Four or More Intraluminal Devices, Open Approach
03700Z1	Dilation of Right Internal Mammary Artery using Drug-Coated Balloon, Open Approach

Showing 1–10 of 33

DRG Codes

3 rows

DRG Code	Description
252	Other Vascular Procedures with MCC
253	Other Vascular Procedures with CC
254	Other Vascular Procedures without CC/MCC

Typical Clinical Scenarios

An older patient with progressive angina undergoes preoperative coronary angiography demonstrating significant stenosis of the right internal mammary artery graft contributing to myocardial ischemia. A planned inpatient percutaneous dilation is performed using a drug-eluting stent to restore luminal diameter and improve graft flow as part of revascularization strategy. The goal is elective arterial dilation to relieve ischemia and reduce symptoms. Typical codes: 037034Z
A middle-aged patient presents emergently with acute chest pain and hemodynamic instability; angiography reveals an acute thrombosis with critical narrowing of the right internal mammary artery. An urgent percutaneous dilation is performed with balloon angioplasty and placement of a single intraluminal device without drug coating to rapidly restore perfusion. This immediate intervention addresses the acute loss of arterial blood flow. Typical codes: 03703DZ
A patient with prior stent placement in the right internal mammary artery returns with in-stent restenosis causing recurrent exertional angina. During an inpatient admission, percutaneous endoscopic revision is performed using a drug-coated balloon to dilate the restenotic segment and reduce neointimal hyperplasia without inserting an additional permanent device. The procedure targets lumen expansion within the previously treated artery. Typical codes: 03704D1

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

0372-INNOMINATE-ARTERY-DILATION

ICD-10-PCS Code For Innominate Artery: Procedure Code Group Overview

0373-SUBCLAVIAN-ARTERY-DILATION

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

0374-LEFT-SUBCLAVIAN-ARTERY-DILATION

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

0375-AXILLARY-ARTERY-DILATION

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

0376-AXILLARY-ARTERY-LEFT-DILATION

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

0377-BRACHIAL-ARTERY-RIGHT-DILATION

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

0378-LEFT-BRACHIAL-ARTERY-DILATION

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

0379-ULNAR-ARTERY-RIGHT-DILATION

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

037A-ULNAR-ARTERY-LEFT-DILATION

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

Showing 1–10 of 29

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.

Published by

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

OpenPayer

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

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Internal Mammary Artery, Right Dilation Procedure Overview

Code Attributes

OpenPayer

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

Sign up for ICD-10-PCS Code For Internal Mammary Artery, Right: Procedure Code Group Overview policy alerts

Internal Mammary Artery, Right Dilation Procedure Overview

Code Attributes

When to Use

ICD-10-PCS Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

References

When to Use

ICD-10-PCS Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

References

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

Sign up for ICD-10-PCS Code For Internal Mammary Artery, Right: Procedure Code Group Overview policy alerts

Internal Mammary Artery, Right Dilation Procedure Overview

Code Attributes

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

Sign up for ICD-10-PCS Code For Internal Mammary Artery, Right: Procedure Code Group Overview policy alerts

Internal Mammary Artery, Right Dilation Procedure Overview

Code Attributes

When to Use

ICD-10-PCS Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

Which body system and body part does ICD-10-PCS code group 0370 target?

What is the general operation described in the 0370 code group?

How do approach and device details affect code selection in this group?

Can you list examples of specific ICD-10-PCS codes in this group and what they represent?

Which DRGs are related to procedures coded from the 0370 group?

References

When to Use

ICD-10-PCS Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

Which body system and body part does ICD-10-PCS code group 0370 target?

What is the general operation described in the 0370 code group?

How do approach and device details affect code selection in this group?

Can you list examples of specific ICD-10-PCS codes in this group and what they represent?

Which DRGs are related to procedures coded from the 0370 group?

References