Ketan,
I have been through one of those similar board of medicine investigations before(I prevailed). It probably cost my malpractice insurance company $10-20 thousand to defend me. What a waste of money.
As far as your case, after your ordeal, you know, but hippa privacy does not apply to T.P.O. (treatment, payment, operations).
Obviously your contacting the trainer is good faith, in the interest of the patient, and ethically correct in terms of treatment.
No good deed goes unpunished, as they say.