ICD-10-CM Code For Disorders Of Arteries Arterioles And Capillaries In Diseases Classified Elsewhere: Group Overview

The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group I79 includes vascular disorders of arteries, arterioles, and capillaries that occur as part of other systemic diseases, such as connective tissue disorders, vasculitides, or diabetic microangiopathy. These ICD-10-CM diagnosis codes are used to document manifestations of underlying diseases affecting the arterial microvasculature, capturing site-specific involvement, disease severity, and related complications. Accurate coding within the ICD-10-CM I79 group supports proper claim adjudication by reflecting the association with the primary disease and ensuring appropriate reimbursement.

Customize your policy alerts

Sign up for ICD-10-CM Code For Disorders Of Arteries Arterioles And Capillaries In Diseases Classified Elsewhere: Group Overview policy alerts

Get alerted when relevant policies change without checking for updates manually.

Monitor payer policy activity

Receive email alerts as soon as relevant payer policies are published or updated.

ICD-10-CM I79: Disorders Of Arteries, Arterioles And Capillaries In Diseases Classified Elsewhere Overview

This group captures disorders of the arterial microvasculature that occur as manifestations of other underlying diseases, affecting arteries, arterioles, and capillaries across organ systems. It targets vascular complications tied to systemic conditions rather than primary vascular diseases. Accurate coding ensures the clinical picture and disease associations are clear, which supports correct claim processing and reimbursement.

When to Use

Use codes from this group when arterial, arteriolar, or capillary pathology is documented as a complication or manifestation of another diagnosed condition. Select the code that links the vascular disorder to the underlying disease and reflects the documented site and severity.

ICD-10-CM Codes

3 rows

ICD-10-CM Code	Description
I79.0	Aneurysm of aorta in diseases classified elsewhere
I79.1	Aortitis in diseases classified elsewhere
I79.8	Other disorders of arteries, arterioles and capillaries in diseases classified elsewhere

DRG Codes

3 rows

DRG Code	Description
299	Peripheral Vascular Disorders with MCC
300	Peripheral Vascular Disorders with CC
301	Peripheral Vascular Disorders without CC/MCC

Typical Clinical Scenarios

An elderly patient with long-standing hypertension and peripheral arterial atherosclerosis presents for routine follow-up with worsening intermittent claudication and nonhealing ischemic ulcers on the lower leg. Vascular imaging shows diffuse arterial wall thickening and lumen narrowing attributed to a systemic connective tissue disease affecting medium and small arteries, and the coder assigns a diagnosis from this group to capture arterial involvement secondary to the underlying disease. Typical codes: I79.1
A middle-aged patient with a known autoimmune condition (such as systemic lupus erythematosus) is admitted for acute digital ischemia and livedo reticularis; evaluation suggests vasculopathy of small arterioles and capillaries related to the primary systemic disease. Because the arterial disorder is manifested as part of the underlying systemic disease process rather than a primary peripheral arterial disease, a code from this group is used to document the arterial disorder in that context. Typical codes: I79.8
A patient with a prior history of radiation therapy to the pelvis for malignancy presents months to years later with progressive pelvic arterial stenosis causing chronic pelvic ischemic pain and claudication. The late effect of radiation on arterial walls is documented as an arterial disorder in diseases classified elsewhere, and the appropriate group code is assigned to reflect radiation-induced arterial damage. Typical codes: I79.0

Related Codes

I70-ATHEROSCLEROSIS

ICD-10-CM Code For Atherosclerosis: Group Overview

I71-AORTIC-ANEURYSM-AND-DISSECTION

ICD-10-CM Code For Aortic Aneurysm And Dissection: Group Overview

I72-OTHER-ANEURYSM-PERIPHERAL-ARTERIES

ICD-10-CM Code For Other Aneurysm: Group Overview

I73-OTHER-PERIPHERAL-VASCULAR-DISEASES

ICD-10-CM Code For Other Peripheral Vascular Diseases: Group Overview

I74-ARTERIAL-EMBOLISM-AND-THROMBOSIS

ICD-10-CM Code For Arterial Embolism And Thrombosis: Group Overview

I75-ATHEROEMBOLISM

ICD-10-CM Code For Atheroembolism: Group Overview

I76-SEPTIC-ARTERIAL-EMBOLISM

ICD-10-CM Code For Septic Arterial Embolism: Group Overview

I77-OTHER-DISORDERS-OF-ARTERIES-AND-ARTERIOLES

ICD-10-CM Code For Other Disorders Of Arteries And Arterioles: Group Overview

I78-DISEASES-OF-CAPILLARIES

ICD-10-CM Code For Diseases Of Capillaries: 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.

Published by

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

Trek Health ingests and normalizes Transparency in Coverage data and payer policy updates to give provider organizations a clear view of how commercial reimbursement behaves across markets, payers, and services. Our platform transforms raw payer disclosures into structured intelligence that supports contract evaluation, payer negotiations, and service line strategy. By combining market benchmarks with ongoing policy visibility, Trek helps teams identify variability, risk, and opportunity in commercial reimbursement. The result is faster insight, stronger negotiating positions, and more informed financial decisions.

Explore openpayer tools

View all tools

When to Use

ICD-10-CM Codes

3 rows

ICD-10-CM Code	Description
I79.0	Aneurysm of aorta in diseases classified elsewhere
I79.1	Aortitis in diseases classified elsewhere
I79.8	Other disorders of arteries, arterioles and capillaries in diseases classified elsewhere

DRG Codes

3 rows

DRG Code	Description
299	Peripheral Vascular Disorders with MCC
300	Peripheral Vascular Disorders with CC
301	Peripheral Vascular Disorders without CC/MCC

Typical Clinical Scenarios

An elderly patient with long-standing hypertension and peripheral arterial atherosclerosis presents for routine follow-up with worsening intermittent claudication and nonhealing ischemic ulcers on the lower leg. Vascular imaging shows diffuse arterial wall thickening and lumen narrowing attributed to a systemic connective tissue disease affecting medium and small arteries, and the coder assigns a diagnosis from this group to capture arterial involvement secondary to the underlying disease. Typical codes: I79.1
A middle-aged patient with a known autoimmune condition (such as systemic lupus erythematosus) is admitted for acute digital ischemia and livedo reticularis; evaluation suggests vasculopathy of small arterioles and capillaries related to the primary systemic disease. Because the arterial disorder is manifested as part of the underlying systemic disease process rather than a primary peripheral arterial disease, a code from this group is used to document the arterial disorder in that context. Typical codes: I79.8
A patient with a prior history of radiation therapy to the pelvis for malignancy presents months to years later with progressive pelvic arterial stenosis causing chronic pelvic ischemic pain and claudication. The late effect of radiation on arterial walls is documented as an arterial disorder in diseases classified elsewhere, and the appropriate group code is assigned to reflect radiation-induced arterial damage. Typical codes: I79.0

Related Codes

I70-ATHEROSCLEROSIS

ICD-10-CM Code For Atherosclerosis: Group Overview

I71-AORTIC-ANEURYSM-AND-DISSECTION

ICD-10-CM Code For Aortic Aneurysm And Dissection: Group Overview

I72-OTHER-ANEURYSM-PERIPHERAL-ARTERIES

ICD-10-CM Code For Other Aneurysm: Group Overview

I73-OTHER-PERIPHERAL-VASCULAR-DISEASES

ICD-10-CM Code For Other Peripheral Vascular Diseases: Group Overview

I74-ARTERIAL-EMBOLISM-AND-THROMBOSIS

ICD-10-CM Code For Arterial Embolism And Thrombosis: Group Overview

I75-ATHEROEMBOLISM

ICD-10-CM Code For Atheroembolism: Group Overview

I76-SEPTIC-ARTERIAL-EMBOLISM

ICD-10-CM Code For Septic Arterial Embolism: Group Overview

I77-OTHER-DISORDERS-OF-ARTERIES-AND-ARTERIOLES

ICD-10-CM Code For Other Disorders Of Arteries And Arterioles: Group Overview

I78-DISEASES-OF-CAPILLARIES

ICD-10-CM Code For Diseases Of Capillaries: 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.

Published by

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

ICD-10-CM Code For Disorders Of Arteries Arterioles And Capillaries In Diseases Classified Elsewhere: Group Overview

Sign up for ICD-10-CM Code For Disorders Of Arteries Arterioles And Capillaries In Diseases Classified Elsewhere: Group Overview policy alerts

ICD-10-CM I79: Disorders Of Arteries, Arterioles And Capillaries In Diseases Classified Elsewhere Overview

ICD-10-CM Code For Disorders Of Arteries Arterioles And Capillaries In Diseases Classified Elsewhere: Group Overview

Sign up for ICD-10-CM Code For Disorders Of Arteries Arterioles And Capillaries In Diseases Classified Elsewhere: Group Overview policy alerts

ICD-10-CM I79: Disorders Of Arteries, Arterioles And Capillaries In Diseases Classified Elsewhere Overview

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

Which conditions are included in ICD-10-CM code group I79?

How does coding within I79 affect claim processing?

What specific codes are listed under the I79 group and what do they indicate?

Which DRGs are related to the I79 diagnosis group?

What clinical situations warrant using an I79 code instead of a primary vascular code?

References

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

Which conditions are included in ICD-10-CM code group I79?

How does coding within I79 affect claim processing?

What specific codes are listed under the I79 group and what do they indicate?

Which DRGs are related to the I79 diagnosis group?

What clinical situations warrant using an I79 code instead of a primary vascular code?

References