"He's getting a routine follow up on his leg. It's just a routine checkup," said spokeswoman Megan McGinn.
Just over two weeks ago, doctors discovered a blood clot in the vice president's leg. They said at the time that he likely would have to be treated with blood-thinning medication for several months.
Spokeswoman Lee Anne McBride said at the time that the 66-year-old had visited his doctor's office on March 5 after feeling minor discomfort in his calf. An ultrasound showed the blood clot — called a deep venous thrombosis — in his left lower leg.
Blood clots that form deep in the legs can become killers if they break off and float into the lungs. This is called a pulmonary embolism. Deep vein thrombosis strikes an estimated 2 million Americans each year, killing 60,000.
Many people suffer DVT after spending long periods without moving, such as passengers on long-haul airline flights. Cheney had just spent about 65 hours on a plane on a nine-day, round-the-world trip.
Cheney has had had a host of heart-related problems over the years.
He had six hours of surgery on his legs in 2005 to repair a kind of aneurysm, a ballooning weak spot in an artery that can burst if left untreated. He has had four heart attacks, quadruple bypass surgery, two artery-clearing angioplasties and an operation to implant a special pacemaker in his chest.