Dr. Alex Yadao, 73, is accused of running a cash-only operation out of his Prince William Co. office, pushing as many as 8,000 pills each week. (Prince William County Police)

Dr. Alex Peralta Yadao, 73, of the Alexandria section of Fairfax County, is accused of selling Oxycontin, morphine and other pain medications. He was arrested Dec. 8 and held without a bond.

Yadao allegedly ran the cash-only operation through his office on Old Triangle Road with the help of 53-year-old Keith Edward Payne, a man who police said lived in the basement apartment beneath the office. He has also been charged in the case.

In a search of the property, investigators seized several prescription medications, records, two vehicles and an undisclosed amount of cash, police said.

Yadao has been charged with 18 counts of possession with intent to distribute as well as 18 counts of prescription fraud.

Payne was charged with distributing narcotics and is being held without bond.

Additionally, police arrested two of Yadao’s clients. Paul Mathew Philips, 49, and Bonnie Kay Philips, 43.

The Philipses were arrested in their Fauquier County home, in Midland, Va., and charged with prescription fraud and possession of a controlled substance. They were held on a $10,000 secured bond.

All four suspects are scheduled to appear in court Feb. 6, 2012.

This item has been updated.