When asked what role, if any, he played in VeriChip's approval, Thompson replied: "I had nothing to do with it. And if you look back at my record, you will find that there has never been any improprieties whatsoever."

FDA's Watson said: "I have no recollection of him being involved in it at all." VeriChip Corp. declined comment.

Thompson vigorously campaigned for electronic medical records and healthcare technology both as governor of Wisconsin and at HHS. While in President Bush's Cabinet, he formed a "medical innovation" task force that worked to partner FDA with companies developing medical information technologies.

At a "Medical Innovation Summit" on Oct. 20, 2004, Lester Crawford, the FDA's acting commissioner, thanked the secretary for getting the agency "deeply involved in the use of new information technology to help prevent medication error." One notable example he cited: "the implantable chips and scanners of the VeriChip system our agency approved last week."

After leaving the Cabinet and joining the company board, Thompson received options on 166,667 shares of VeriChip Corp. stock, and options on an additional 100,000 shares of stock from its parent company, Applied Digital Solutions, according to SEC records. He also received $40,000 in cash in 2005 and again in 2006, the filings show.

The Project on Government Oversight called Thompson's actions "unacceptable" even though they did not violate what the independent watchdog group calls weak conflict-of-interest laws.

"A decade ago, people would be embarrassed to cash in on their government connections. But now it's like the Wild West," said the group's executive director, Danielle Brian.

Thompson is a partner at Akin Gump Strauss Hauer & Feld LLP, a Washington law firm that was paid $1.2 million for legal services it provided the chip maker in 2005 and 2006, according to SEC filings.

He stepped down as a VeriChip Corp. director in March to seek the GOP presidential nomination, and records show that the company gave his campaign $7,400 before he bowed out of the race in August.

In a TV interview while still on the board, Thompson was explaining the benefits - and the ease - of being chipped when an interviewer interrupted:

"I'm sorry, sir. Did you just say you would get one implanted in your arm?"

"Absolutely," Thompson replied. "Without a doubt."

"No concerns at all?"

"No."

But to date, Thompson has yet to be chipped himself.