The doctor at the Kolonaki practice where Giorgos Mazonakis collapsed has told police the singer was “hyper-excited” when he arrived and explained why he had come. She also said he told her he was not feeling well, was slurring his words, and was very tired, according to reports first aired by Mega.
Mazonakis, 54, went on Wednesday afternoon, 9 September 2026, to a private facility on Karneadou Street in Kolonaki, reported as the Stem Cell clinic. He was scheduled for plasmapheresis. After an intravenous catheter was placed, he suffered cardiac arrest. EKAB was called around 16:30. A first-response motorcycle medic began CPR; an ambulance then took him to Elpis Hospital.
The hospital said he arrived at 16:45 with no spontaneous breathing and no pulse. Resuscitation followed protocol and failed. Official time of death: 17:40.
The internist who runs the practice and her husband, also a doctor and listed as clinic owner, were taken for questioning on Wednesday evening. Both were released just before midnight after giving statements. He reportedly told investigators he did not perform the procedure and that his wife was treating and monitoring Mazonakis. Their lawyer said the two deny any link between the treatment and the death and that liability would require proven medical negligence. Forensic findings are still pending.
Health Minister Adonis Georgiadis said the premises held a license for a general internal-medicine practice, not for plasmapheresis, and ordered checks by the Athens Medical Association. He called the site an “alleged clinic” and said the exact cause of death, and any responsibility, will come from the forensic investigation. The Medical Association has begun an inspection of whether the procedure was carried out in a properly licensed setting.
What plasmapheresis is
Therapeutic plasma exchange is an extracorporeal treatment used for serious conditions such as myasthenia gravis, Guillain-Barré syndrome, severe autoimmune encephalitis, and selected hematologic or renal diseases. Blood is separated so plasma can be removed and replaced with albumin solution, fresh frozen plasma, or a mix of albumin and saline. Sessions typically last two to four hours and require continuous monitoring. In Greece the procedure is normally done in hospital dialysis, apheresis, or ICU units with trained staff and resuscitation equipment—not in an ordinary private internist’s office. Use of the method for wellness or “biohacking” in otherwise healthy people is viewed with caution by many clinicians.
Police, prosecutors, and medical regulators are examining the license, the equipment, who performed the procedure, and the sequence of events. The autopsy will determine the medical cause of death.
