Dr. Marina Zemskova and Alexei Zemskova bought a five-bedroom, 4.5-bath home at 308 Misty Knoll Dr. in Rockville from Alberto and Marianella Jimenez-Delucio for $840,000 on Oct. 27.

The Jimenez-Delucios paid $575,000 for the property in Aug. 2001. The 3,336-square-foot house was built in 2001 in the Rockville West of Hungerford Drive neighborhood.

Dr. Zemskova practices endocrinology and internal medicine at the National Institutes of Health and Georgetown University Medical Center.

She received her M.D. from Kiev Medical Institute.

According to BlockShopper.com, there have been 612 sales in Rockville during the past 12 months, with a median sales price of $385,000.

Address: 308 Misty Knoll Drive
Buyer(s): Marina Zemskova and Alexei Zemskov
Seller(s): Alberto F Jimenez Delucio and Marianella D Jimenez Delucio
Sale date: Oct. 27, 2009