The owner of a Brockton physical therapy clinic and one of her employees have been sentenced for defrauding insurance companies in connection with physical therapy services purportedly provided to patients involved in car accidents.

Federal prosecutors say 39-year-old Walkyrie Massie, and 65-year-old Edward Rossi, of Rochester, were sentenced Thursday to 2 1/2 years and 18 months respectively, two years of probation, and ordered to pay the defrauded insurance companies almost $175,000.

Massie and Rossi pleaded guilty to conspiracy to commit mail fraud and two counts of mail fraud.

Prosecutors say Massie and her employee submitted fraudulent medical progress notes to insurance companies, and Rossi filled in ‘‘cookie-cutter treatment notes” for people who never or only briefly showed up, or who Rossi didn’t see.