Since 2002 HLK has its own Ministry of Emergency Situations and Civil Protection. As name suggests, the structure of the ministry is between French Sécurité Civile or Italian Protezione Civile and Commonwealth of Independent States/Russia Ministry of Emergency Situations. It includes both the National Center for Direct Aid (or EKAB, Εθνικό Κέντρο Άμεσης Βοήθειας) which provides ambulance and air-ambulance services and the Hellenic Fire Service. NCDA/EKAB operates a large fleet of heavy, light, utility ambulances plus specialized all terrain ambulances for mountain villages. There is also a air ambulance service with helicopters and fixed wing aircraft spread out to islands and mainland. Moreover, there is a fleet of marine ambulances for serving smaller islands. Healthcare services in larger islands is developed enough to cover at least 80-85% of health issues, with Cretan hospitals capable of >95%, being the local healthcare center for Dodecanese in southeast Aegean. In mainland, each province capital has also advanced healthcare facilities to minimized as possible air transport to Athens and Thessaloniki. Both cities are the South and North healthcare centers of Hellenic Healthcare Service. Both public and private healthcare hospitals exist. Generally the structure is based on OTL, but much improved.
Real Hellas link:
https://en.wikipedia.org/wiki/Healthcare_in_Greece
Here is an Eurocopter EC-135 of NDCA/EKAB AU and a Rockwell OV-10T. In total 24 and 8 respectively, also Hellenic Army Aviation operates 15 OV-10T and 46 OV-10X(H), plus 16 OV-10X(H) in Hellenic Navy Marines Aviation. NDCA/EKAB AU helicopters are EC-135P2 (24), MD-902 (12) and AW-169EMS (24).