A 2014 tea party candidate for the U.S. Senate, who opposes Obamacare, reports he has more than $1 million in income as a diagnostic radiologist and investor in an imaging center.

Milton R. Wolf, M.D., R-Kan., who is challenging Sen. Pat Roberts, R-Kan., in the 2014 Republican primary election, today filed his personal financial disclosure report as required by the Ethics in Government Act. The report, which Wolf listed as a 2013 report, covers 2012 and the first 11 months of 2013, and shows he had income including: $916,034 in salary from Alliance Radiology; $157,379 in shareholder income from Johnson County Imaging Center; $7,200 in non-employee compensation from the Washington Times as a columnist; $2,800 from Premiere Speakers Bureau; and $580 in royalties from Harper Collins for an e-book publication.

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His investment in the Johnson County Imaging Center is listed at a value between $100,001 and $250,000.

His report listed investments in a variety of mutual funds, the largest being $100,001 to $250,000 in American Funds’ Growth Fund of America. He also listed several bank accounts.

His liabilities include a consolidated $100,001 to $250,000 student loan from Sallie Mae in 2004, and a $100,001 to $250,000 promissory note from Johnson County Imaging Center in 2009.

Updated: Wolf’s staff provided more detail on the specific covering period.