A Bend man was experiencing depression as a result of his failing marriage so he went to his family physician, who counseled him on ways to improve his marriage and prescribed him marijuana and CBD.

The patient now states in a lawsuit that all along, the doctor, Ronald Rosen, was having an affair with his wife.

In a complaint filed Monday in Deschutes County Circuit Court, local musician and financial adviser Pierson Tone seeks $2.9 million from Rosen for professional negligence.

“As a result of (Rosen’s) conduct, plaintiff sustained emotional distress including … the loss of his marriage and emotional and social destruction of his family,” the lawsuit states.

Rosen did not return messages left at his office.

From 2015 to 2018, Tone, his wife and two children received medical care at Rosen’s clinic, Open Paths Integrative Medicine, on NE Fifth Street in Bend, according to the suit. At some point, Rosen began a relationship with Tone’s wife.

In November 2018, Tone went to Rosen to treat his depression, which was caused by stress in his relationship, the lawsuit states.

Rosen counseled Tone and offered him solutions to enhance and heal his marriage, and prescribed him herbs and breathing techniques for his depression, in addition to marijuana and CBD.

After the visit, Tone learned Rosen had been involved with his wife for an “extended” period of time, the complaint states. The couple later divorced.

Rosen has been licensed to practice medicine in Oregon since 1991, according to the Oregon Medical Board. He has no prior cases of medical malpractice.

In addition to traditional medicine, Rosen offers patients a range of holistic alternatives, according to his website. He’s trained to perform acupuncture, osteopathic manipulation and biodynamic cranial osteopathy.

He is also a certified laughter yoga leader.

Tone, 47, who goes by his middle name, Franchot, has experienced success in the disparate fields of music and finance — as a songwriter who ran his own studio in Los Angeles and a financial adviser at the local Merrill Lynch office. He is the grandson of the classic Hollywood actor also named Franchot Tone.

Tone’s attorney, James D. Huegli, declined to comment.