Monica Weeks, 40, of Madison, handled the clinic's billing from her Ridgeland firm, Medical Billing Group. Jordan sentenced her to three months' house arrest and three years' probation and ordered her to help pay $19,550 in restitution. She pleaded guilty to conspiracy July 13.
"I'm truly sorry for the mistakes I made, and I promise nothing like this will ever happen again," Weeks told the judge.
Attorneys said dozens of people submitted letters of support for Weeks.
"Some of the letters said that she did nothing wrong," Jordan said. "I disagree with that."
The judge said that although Weeks voluntarily contacted authorities when she suspected wrongdoing at the clinic, she was involved in more than $19,000 of fraudulent billing.
Relatives of two former Rose Cancer Clinic patients testified Friday.
Rosetta Chairs of Metairie, La., said her older sister, Gloria Chairs, was treated there despite being wrongly diagnosed with cancer. Rosetta Chairs said she believes the treatments contributed to her sister's death earlier this year at age 49.
Ernest Whittington, a Baptist minister from Liberty, Miss., said his wife of 61 years, Bettie, survived breast cancer but later developed bone cancer and was treated at Rose Cancer Clinic. He said she grew extremely ill while being treated at the clinic, and he believes it was because of the medicine she was given there. She died in August 2011.
"She was my helpmate all those years," Whittington said. "I lost my right arm when I lost her."
Civil lawsuits have also been filed against Sachdeva in state court.
The Mississippi Health Department closed Rose Cancer Clinic in July 2011 because of "unsafe infection control practices" after 11 patients were hospitalized with the same bacterial infection. The scare led officials to test nearly 300 cancer patients for infections such as HIV. The department has said none of the patients tested had blood-borne viral infections related to the clinic's care. However, a civil lawsuit claims at least one patient died about the time the clinic was shut down from HIV he contracted there.
Sachdeva, a naturalized citizen from India, has been held without bond since her arrest in August 2011 because she's considered a flight risk. Prosecutors say she had considerable assets, including bank accounts in her native country, despite the seizure of about $6 million.
Associated Press writer Holbrook Mohr contributed to this report.