ICD-9 Diagnosis Code 440.21

Ath ext ntv at w claudct

Diagnosis Code 440.21

ICD-9: 440.21
Short Description: Ath ext ntv at w claudct
Long Description: Atherosclerosis of native arteries of the extremities with intermittent claudication
This is the 2014 version of the ICD-9-CM diagnosis code 440.21

Code Classification
  • Diseases of the circulatory system (390–459)
    • Diseases of arteries, arterioles, and capillaries (440-449)
      • 440 Atherosclerosis

Information for Medical Professionals

Code Edits
The following edits are applicable to this code:
Adult diagnoses (age 15 through 124) Additional informationCallout TooltipAdult diagnoses (age 15 through 124)
Adult diagnoses: Age range is 15–124 years inclusive.

Convert to ICD-10 Additional informationCallout TooltipGeneral Equivalence Map
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.

  • Intermittent claudication due to atherosclerosis of native artery of limb

Index of Diseases and Injuries
References found for the code 440.21 in the Index of Diseases and Injuries:

Information for Patients


Also called: Arteriosclerosis

Atherosclerosis is a disease in which plaque builds up inside your arteries. Plaque is a sticky substance made up of fat, cholesterol, calcium, and other substances found in the blood. Over time, plaque hardens and narrows your arteries. That limits the flow of oxygen-rich blood to your body.

Atherosclerosis can lead to serious problems, including

  • Coronary artery disease. These arteries supply blood to your heart. When they are blocked, you can suffer angina or a heart attack.
  • Carotid artery disease. These arteries supply blood to your brain. When they are blocked you can suffer a stroke.
  • Peripheral arterial disease. These arteries are in your arms, legs and pelvis. When they are blocked, you can suffer from numbness, pain and sometimes infections.

Atherosclerosis usually doesn't cause symptoms until it severely narrows or totally blocks an artery. Many people don't know they have it until they have a medical emergency.

A physical exam, imaging, and other diagnostic tests can tell if you have it. Medicines can slow the progress of plaque buildup. Your doctor may also recommend procedures such as angioplasty to open the arteries, or surgery on the coronary or carotid arteries. Lifestyle changes can also help. These include following a healthy diet, getting regular exercise, maintaining a healthy weight, quitting smoking, and managing stress.

NIH: National Heart, Lung, and Blood Institute

  • Angioplasty and stent placement - peripheral arteries
  • Arteriogram
  • Atherosclerosis - NIH (National Heart, Lung, and Blood Institute)
  • Doppler ultrasound exam of an arm or leg
  • Extremity angiography
  • Hardening of the arteries
  • How Is Atherosclerosis Treated? - NIH (National Heart, Lung, and Blood Institute)
  • Magnetic resonance angiography


Peripheral Arterial Disease

Also called: PAD

Peripheral arterial disease (PAD) happens when there is a narrowing of the blood vessels outside of your heart. The cause of PAD is atherosclerosis. This happens when plaque builds up on the walls of the arteries that supply blood to the arms and legs. Plaque is a substance made up of fat and cholesterol. It causes the arteries to narrow or become blocked. This can reduce or stop blood flow, usually to the legs. If severe enough, blocked blood flow can cause tissue death and can sometimes lead to amputation of the foot or leg.

The main risk factor for PAD is smoking. Other risk factors include older age and diseases like diabetes, high blood cholesterol, high blood pressure, heart disease, and stroke.

Many people who have PAD don't have any symptoms. If you have symptoms, they may include

  • Pain, numbness, achiness, or heaviness in the leg muscles. This happens when walking or climbing stairs.
  • Weak or absent pulses in the legs or feet
  • Sores or wounds on the toes, feet, or legs that heal slowly, poorly, or not at all
  • A pale or bluish color to the skin
  • A lower temperature in one leg than the other leg
  • Poor nail growth on the toes and decreased hair growth on the legs
  • Erectile dysfunction, especially among men who have diabetes

PAD can increase your risk of heart attack, stroke, and transient ischemic attack.

Doctors diagnose PAD with a physical exam and heart and imaging tests. Treatments include lifestyle changes, medicines, and sometimes surgery. Lifestyle changes include dietary changes, exercise, and efforts to lower high cholesterol levels and high blood pressure.

NIH: National Heart, Lung, and Blood Institute

  • Angioplasty and stent placement - peripheral arteries
  • Angioplasty and stent placement - peripheral arteries - discharge
  • Arteriogram
  • Doppler ultrasound exam of an arm or leg
  • Duplex ultrasound
  • Extremity angiography
  • Ischemic ulcers -- self-care
  • Magnetic resonance angiography
  • Peripheral artery bypass - leg
  • Peripheral artery bypass - leg - discharge
  • Peripheral artery disease - legs
  • Peripheral artery disease of the legs - self-care
  • Thromboangiitis obliterans

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