As to what D_S wrote, I agree with a part and disagree with a part.
Foreigners should keep it simple ... ask how much things cost. The clinic must know how much a per-night stay cots, in a private suite and in a shared room. They were in a shared room (all 3 of them in one room). I guess that does not cost more than RD$1,500 per night or max RD$2,000 per night. Here in Higuey the best clinic best room costs about RD$2,500 per night. So sum it up - 3 days, 3 persons, at RD$1,500 = RD$9,000 pesos. Multiply by 3 for any medicines, lab tests, etc. that is 27,000 pesos. The KISS thing would be to not pay more than US$700 deposit.
Example: Xray: 500 pesos, complete blood, stool lab test - less than RD$800-900 max, CT scan RD$5,600.
Amoeba etc.. my daughter was diagnosed with suspicion of one, with insurance (20% copay) I paid like RD$700-750 for tests, and that included a RD$600 test that was not covered by insurance ... that leaves the other covered tests (blood, stool, urine) at 150 pesos...20% copay ... means base charge was about 750 pesos. So sum up, that is about RD$1,350 in full complete exams you can think of for Amoeba. The exams were done at Patria Rivas, not the cheapest of labs. So RD$1,350 x 3 = RD$4,000 pesos.
So with 3 days being hospitalized plus a complete set of tests = for all 3 of them = RD$13,000.
Now calculate 3 "sueros" per day an average for each one, at RD$800 ... that is RD$21,600 (and I am pushing it here).
Now calculate 2 daily doctor consultations, per day, for 3 of them, at RD$700 each = RD$12,600
Now add material gastable... let's say RD$1,000 per day for each one of them = RD$9,000
summary: TOTAL maximum cost pushing it to 12,000 feet high levels = RD$56,200 = about US$1,340
So double the initially though deposit of US$700 ... we get at less than US$1,500 ...pushing it.
US$5,000 is an armed robbery, and charging US$25,000 to foreign insurance is absolute insurance fraud perpetrated by the Medical Centre.