Other peripheral vascular diseases (I73) ICD-10-CM
The I73 code range covers other peripheral vascular diseases with 9 ICD-10-CM diagnosis codes. 6 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
Codes in the I73 Range 9 codes · 6 billable
- I73 Other peripheral vascular diseasesNon-billable
- I73.0 Raynaud's syndromeNon-billable
- I73.00 Raynaud's syndrome without gangrene
- I73.01 Raynaud's syndrome with gangrene
- I73.1 Thromboangiitis obliterans [Buerger's disease]
- I73.8 Other specified peripheral vascular diseasesNon-billable
- I73.81 Erythromelalgia
- I73.89 Other specified peripheral vascular diseases
- I73.9 Peripheral vascular disease, unspecified
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the I73 range.
Erythema Induratum
A type of panniculitis characterized histologically by the presence of granulomas, vasculitis, and necrosis. It is traditionally considered to be the tuberculous counterpart of nodular vasculitis, but is now known to occur without tuberculous precedent. It is seen most commonly in adolescent and menopausal women, is initiated or exacerbated by cold weather, and typically presents as one or more recurrent erythrocyanotic nodules or plaques on the calves. The nodules may progress to form indurations, ulcerations, and scars.
Erythromelalgia
A peripheral arterial disease that is characterized by the triad of ERYTHEMA, burning PAIN, and increased SKIN TEMPERATURE of the extremities (or red, painful extremities). Erythromelalgia may be classified as primary or idiopathic, familial or non-familial. Secondary erythromelalgia is associated with other diseases, the most common being MYELOPROLIFERATIVE DISORDERS.
Intermittent Claudication
A symptom complex characterized by pain and weakness in SKELETAL MUSCLE group associated with exercise, such as leg pain and weakness brought on by walking. Such muscle limpness disappears after a brief rest and is often relates to arterial STENOSIS; muscle ISCHEMIA; and accumulation of LACTATE.
Peripheral Arterial Disease
Lack of perfusion in the EXTREMITIES resulting from atherosclerosis. It is characterized by INTERMITTENT CLAUDICATION, and an ANKLE BRACHIAL INDEX of 0.9 or less.
Peripheral Vascular Diseases
Pathological processes involving any one of the BLOOD VESSELS in the vasculature outside the HEART.
Thromboangiitis Obliterans
A non-atherosclerotic, inflammatory thrombotic disease that commonly involves small and medium-sized arteries or veins in the extremities. It is characterized by occlusive THROMBOSIS and FIBROSIS in the vascular wall leading to digital and limb ISCHEMIA and ulcerations. Thromboangiitis obliterans is highly associated with tobacco smoking.
About the I73 Code Range
The ICD-10 code I73 and its subcodes are used to classify a variety of peripheral vascular diseases that affect blood circulation outside the heart and brain. These include conditions like Raynaud's syndrome (I73.0), thromboangiitis obliterans, and other less common vascular disorders.
This group addresses specific issues such as Raynaud's syndrome without gangrene (I73.00), also called Raynaud's phenomenon or Raynaud's disease, which involves blood vessel spasms often triggered by autoimmune causes, trauma, or occupational exposure. When gangrene develops as a complication, the code changes to I73.01. Thromboangiitis obliterans (Buerger's disease) is coded under I73.1 and describes a rare inflammatory vascular condition mostly linked to tobacco use. Other specified peripheral vascular diseases and symptoms like erythromelalgia (I73.81), characterized by burning pain and redness in extremities, are included as well. The I73.9 code covers unspecified peripheral vascular disease and related complications such as poor circulation, claudication, and vascular insufficiency. These codes help healthcare professionals accurately identify and document complex peripheral vascular problems for diagnosis and treatment planning.
Questions About This Page
How many billable codes are in the I73 range?
Of the 9 codes in this range, 6 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the I73 range classify?
The range classifies other peripheral vascular diseases. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
