Kissoon Adds Malpractice Claims to Lawsuit Against Dr. Keith Hoerning
Rosana Kissoon has expanded her lawsuit against Dr. Keith Hoerning with fresh medical malpractice allegations, claiming the Long Island physician abruptly ended her course of prescription medications when their affair collapsed, NY Post reported.
The 39-year-old woman filed an updated complaint on Oct. 28, 2026, alleging that Hoerning, a 51-year-old family physician from Greenlawn, New York, supplied her with peptide injections, an antidepressant and weight-loss treatments during their roughly year-and-a-half relationship without proper medical oversight.
Treatment Allegedly Spanned Eight Months Without Exams or Records
According to the filing, Hoerning first started Kissoon on the medications in his medical office in October 2025, demonstrating how to self-administer the peptide shots. Many of the drugs were not FDA approved, the court papers claimed. The treatment then continued for eight months in a parking lot, a hotel room and over WhatsApp without an examination, a medical chart or a fee, the lawsuit alleged.
Kissoon met Hoerning at her job stripping on Long Island in late 2024, the suit claimed. The pair began sleeping together in February 2025 and by the fall of that year were seeing each other several times a week while talking daily, according to the complaint.
Affair Collapsed After Wife Was Contacted
On May 15, 2025, Hoerning sent Kissoon a cease-and-desist letter demanding she stop all contact with him and his family, the suit claimed. Two days later he messaged her a family photo, she alleged. On May 24, he met her at a hotel and administered a peptide injection, then sent instructions for self-injection with messages including “So hot! See u soon” and “Miss u already,” the updated filing claimed.
On May 26, Kissoon called Hoerning’s wife, Nicole Hoerning, to reveal the affair, prompting the doctor to report her to the police, the lawsuit alleged. At that point, the supply and supervision of Kissoon’s treatment ended, and she stopped every product abruptly with no taper and no instructions, the court papers claim.
Physical and Psychological Effects Alleged
Kissoon claims the sudden cessation wreaked havoc on her stomach and caused mood and behavioral changes. She also reports shoulder and chest pain and is being evaluated for potential heart issues, the filing charges. She has been in counseling since June, according to the suit.
Defense Attorney Calls Claims a Cash Grab
Hoerning’s lawyer, Bruce Barket, blasted the suit as baseless and an attempt to shake down the physician. “We’re not going to pay a nickel to her, and at the end of the day, she’s going to find out that she picked the wrong person,” Barket said. He said his client was only responsible for having an affair and that none of the medical claims were true. Barket claimed Hoerning had kept paying Kissoon to prevent her from exposing the relationship, but when the payments stopped, she went to the press. “It’s based entirely on lies, and it’s frivolous. She has no damages, nothing happened to this woman other than her gravy train stopped,” the defense lawyer said.
Kissoon’s lawyer, Michael Treanor, declined to comment on Barket’s accusations but said the doctor failed to meet the standard of care. “When Dr. Hoerning’s illicit relationship ended, the supply and the supervision ended with it, and she was given no instruction on how to stop,” Treanor said. “Ms. Kissoon is still dealing with the consequences, and her medical evaluation is ongoing.”
Medical Evaluation Ongoing as Case Proceeds
Kissoon is suing for malpractice, and her legal team said they look forward to proving the claims in court. Her medical evaluation remains ongoing, and no court date has been set in the available records.
FAQ
What medications does Kissoon allege Hoerning prescribed?
The lawsuit claims Hoerning supplied peptide injections, an antidepressant and weight-loss treatments, many of which were not FDA approved, according to the Oct. 28, 2026 filing.
What is Dr. Hoerning’s defense?
His attorney Bruce Barket called the suit frivolous and based on lies, asserting that Hoerning did nothing wrong other than engage in an affair and that Kissoon suffered no damages beyond the end of payments.
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