Gov. Cuomo of NYC in his Saturday press conference is talking about the reality that each and every hospital operates as a totally independent entity, separate from any other hospital in the vicinity. Each hospital has its own supplies and equipment, that is generally duplicate at every hospital.

He is encouraging hospitals that get overwhelmed, to shift a part of their load to a nearby hospital that is not overwhelmed yet.
In otherwords he is asking hospitals to act as a health setvice community.

Tangentially what Cuomo is referring to is one of the reasons that health care is so expensive in the US. For the last several decades, every individual hospital has competed with every other hospital around them to purchase the same specialized medical equipment. Every hospital rushed to get there own MRI, thier own CAT, etc.

This specialized equipment is extremely expensive. Instead of hospirals acting as a health community, whereby this hospital has an MRI, a nearby hospital has a CAT scanner, etc. Hospitals would refer to each other. Their financial layout for equipment would be significantly less. The patients pay for the hospitals purchase of overlapping technology.

Doctors will offer reasons and excuses for why this would'nt work. That's natural, but not necessarily true. Everybody likes to have the best of everything at their fingertips. Its good for hospital egos and bragging rights. But not good for the patients when the bill is served up.