When popular Greek singer Giorgos Mazonakis died on September 9 after collapsing at a private medical office in central Athens, the first concern was what had happened to the 54-year-old artist.
Within days, attention shifted to the office itself: who was permitted to perform the procedures offered there, what equipment could legally be installed, and how such practices were being inspected.
The Athens Medical Association has since called for stricter rules and a specialized health inspection body, while the Health Ministry has begun work on a more unified framework for longevity, regenerative medicine and related services.
Health Minister Adonis Georgiadis put the problem unusually plainly in a September 15 interview: “The system failed” to identify what was taking place at the office before Mazonakis’ death. Inspectors had visited the premises several times without finding the equipment that later became central to the investigation.
Mazonakis’ precise cause of death has not been established. The initial autopsy was inconclusive, and investigators are awaiting toxicology and histology results while examining what substances may have been administered before his collapse. Those results were still pending as of September 25.
Two doctors connected to the Kolonaki office are being held in pretrial detention. They face a charge of homicide with possible intent following the examination of digital evidence and data from the plasmapheresis equipment. The doctors deny criminal responsibility. Their detention is a judicial measure while the investigation continues, not a finding of guilt.
A September 10 inspection found two plasmapheresis machines at the premises. The Athens Medical Association said equipment of that type was not permitted in the medical offices as licensed. The premises housed the offices of an internist and a physician without a specialty and had been inspected previously.
Plasmapheresis, or therapeutic plasma exchange, is an established medical procedure used in the treatment of certain diseases. Blood is removed from the body, its plasma is separated or filtered, and blood components are returned to the patient. The procedure can carry serious complications and requires appropriate equipment, personnel and monitoring.
The issue is where such procedures can be performed, under what conditions and by whom, particularly as treatments marketed under terms such as longevity and anti-aging expand outside traditional hospital settings.
Georgiadis has said plasmapheresis should be performed in a hospital environment because complications can require immediate medical intervention. The Kolonaki office was not licensed for that purpose.
Earlier inspections draw scrutiny
The office had already attracted attention before Mazonakis’ death.
The Athens Medical Association received information from a physician in July 2025 about treatments being performed there. Although no formal written complaint followed, the information led to unannounced inspections. Plasmapheresis equipment was not found during those visits, according to the association.
A new issue emerged the following year.
In July 2026, one of the doctors submitted documents concerning what she described as replacement equipment associated with ozone therapy. When the paperwork was reviewed on September 4, an accompanying invoice identified an “inuspheresis double Filtration Device.”
Another surprise inspection was being prepared when Mazonakis died five days later.
The association has denied approving the plasmapheresis equipment, saying the machines were not present during its earlier inspections.
On September 12, it renewed proposals dating to 2020 for tighter control of medical advertising, specific rules for longevity services and a specialized, independent health inspection mechanism. It also asked Greece’s medical scientific societies and Central Health Council to define more precisely which procedures physicians in different specialties may perform in primary-care facilities and what equipment those facilities may contain.
The association argues that existing rules do not exhaustively define every medical act permitted within individual specialties or every type of equipment that may be installed in a private medical office.
Government prepares new rules
The Health Ministry has defended the National Transparency Authority’s investigative powers and said there is no evidence that the reorganization of health inspections caused the alleged violations at the Kolonaki office to go undetected.
At the same time, Georgiadis has acknowledged “gray zones” in the rules and said he would not oppose recreating a health-specific inspection body.
The ministry is now working with physicians and legal experts on a framework covering longevity, regenerative medicine and related services.
Medical advertising is another target. The government has begun using a system called MedWatch to identify businesses and medical offices that may be promoting services beyond what their licenses allow. By September 21, the system had flagged 231 businesses and medical practices for review, including 160 beauty centers advertising medical services.
A separate mobile tool is intended to allow patients to verify the license held by a doctor or medical office and submit complaints.
Political dispute reaches former health minister
The fallout has also reached Migration and Asylum Minister Thanos Plevris, who previously served as health minister.
PASOK questioned Plevris about his past relationship with one of the accused doctors after producing court documents showing that Plevris and both physicians were among those involved in establishing an association called the Hellenic Medical-Legal Council in 2012.
Plevris acknowledged his involvement in the association but disputed PASOK’s characterization of the relationship. He said the group had dozens of members and did not amount to a professional partnership or close personal association. One of the accused doctors later became his physician in 2016.
He has denied knowing that the doctors were performing the treatments now under investigation and said he never introduced legislation benefiting those treatments.
PASOK has continued to question whether Plevris initially gave a complete account of when his relationship with the doctors began. Government spokesman Pavlos Marinakis rejected the criticism and said there was no issue concerning Plevris for the government.
The dispute has not produced evidence connecting Plevris to the medical practices under criminal investigation.
Beyond one medical office
What happened at the Kolonaki practice has exposed practical gaps that extend beyond a single criminal investigation: where certain procedures may be performed, what equipment private offices may install, how newer services should be classified and advertised, and how easily patients can verify that a provider is licensed to offer them.
The criminal investigation will determine what happened to Mazonakis and whether anyone bears criminal responsibility for his death. The broader response is already underway, with proposed rule changes, new inspection tools, and renewed pressure for clearer limits on what private medical practices may offer.