The most modern, professional health facility on this side of Lake Atitlan is Hospitalito in Santiago, which serves the local population of 50,000 Maya and a growing ex-pat community.
Savvy locals from San Pedro and San Marcos also go here for lab work, X-rays, treatment and a full range of other medical services. Funded by donations, Hospitalito needs to buy a new ambulance to better serve the community. For more information, email the treasurer (David at Posada Santiago) at Help Hospitalito Santiago.
This link tells more about Hospitalito Santiago.
Lake Atitlan, Guatemala 