His latest version of the letter's origins follows his accusation that Mr Trump's ex-bodyguard Keith Schiller raided his office while retrieving Mr Trump's medical records after he was elected president.
"As is standard operating procedure, the White House Medical Unit took possession of the president's medical records", White House Press Secretary Sarah Huckabee Sanders told reporters. "They must have been here for 25 or 30 minutes".
He told NBC that he made a decision to speak out after seeing reports that Dr Ronny L. Jackson, the President's nominee to run the Department of Veterans Affairs, had been accused of doling out medications and behaving inappropriately while serving as the White House physician. If that's true, and combined with Bornstein's public revelations to the New York Times about President Trump's hair growth medication, Bornstein may be in some pretty serious legal and ethical hot water-and "absolutely should lose" his medical license, one of the country's leading medical ethicists tells Fortune.
He also described the medications Trump was taking: antibiotics to control rosacea, a statin for elevated blood cholesterol and lipids, and finasteride, a prostate-related drug to promote hair growth.
Separately, Bornstein told CNN that Trump dictated his public letter about the then-candidate's health in 2015. "Forget it, you're out".
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Whether the records' release violated laws or medical ethics depends on what exactly happened - including whether the doctor surrendered the originals and didn't retain a copy, and whether Trump had authorized the release to the three who took them, experts say.
Questions were raised about the legality of the seizure. Bornstein has come forward because of the saga of Dr. Ronny Jackson, who stands accused of a wide array of misdeeds ranging from excessive drinking and wrecking a government vehicle to violating patient privacy.
When Sanders was questioned about the nature of the visit being a raid she said: "No, that is not my understanding".
Bornstein's actions could, theoretically, risk both state and federal blowback, Caplan said-although he doesn't think anything stronger than an official censure or warning is likely. "The physician should not have given over a patient's records without a signed authorization". Fortune reached out to Dr. Bornstein through his office, but a representative declined to comment. Schiller departed the White House last fall and also could not be reached.
Trump cut ties with Bornstein shortly after the article.