UNITED STATES NUCLEAR REGULATORY COMMISSION

REGION 111 2443 WARRENVILLE ROAD, SUITE 210

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Srinivas Koneru, M.D. Radiation Safety Officer Lingareddy Devireddy, M.D., P.C. 1 1900 East 12 Mile Road, Suite 103 Warren, Michigan 48093

Dear Dr. Koneru:

This correspondence is in response to your letter dated December 03, 2010. Dr. Devireddy’s completion of the 80-hour Nuclear Medicine Physics Course may be sufficient to meet the 80- hour classroom & laboratory requirements referenced in 10 CFR Part 35.290(c)( I ) . However, the remaining materials submitted do not meet the minimum Authorized User requirements of Training for Imaging and Localization Studies, under 10 CFR Part 35.290(c)( 1).

According to our review of the submitted materials, we have voided your request to add Lingareddy Devireddy, M.D., as an Authorized User of 10 CFR Part 35.200 byproduct material. This action is without prejudice to resubmission.

If you have any questions or require clarification on any of the information stated above, you may contact me at (630) 829-9892.

In accordance with 10 CFR 2.390 of the NRC’s “Rules of Practice,” a copy of this letter will be available electronically for public inspection in the NRC Public Document Room or from the NRC’s Agencywide Documents Access and Management System (ADAMS), accessible from the NRC Web site at httD://www.nrc.nov/readina-rmladams. html.

Sincerely,

cdU add. T M ~ Sara A. B. Forster Health Physicist Materials Licensing Branch

License No. 21-32388-01 Docket No. 030-35982