453.7625 PL 107.2 is actually the repeater at Orange County Airport in Montgomery. Stat-Flight Air 2 is no longer stationed there and doesn't use that frequency to contact 36 Control. Last I checked, it doesn't even work in the console anymore because of programming errors.
Stat-Flight Air 1 and Air 2 is dispatched by Lifecomm on 463.000 PL 179.9. They talk back to Lifecomm on 468.000 PL 179.9. The old 463.075 link that was up on Schunnemunk was taken down awile back.
Air 1 is located at Westchester Medical Center and Air 2 is at Wallkill Airport in Ulster County.
Lifecomm is located in Colorado. It is operated by Rocky Mountain Helicopter. Stat-Flight was previously dispatched by Westcomm, but the company (Lifenet) decided to centralize it's communications.
Lifeguard 18, stationed at Stewart International Airport, is dispatched by Mobile Life Support Services in Newburgh on 155.385 PL 77.0.
The are dispatched on a rotational basis maintained by Regional Medivac.
They will all rountinely come up on each County Fire Control's main frequency. For example, they will contact 36 Control on 46.220/46.160 PL 123.0. In Orange County, they will talk to the landing zone on 46.400. Also, Lifeguard-18, when on a police mission, will utilize the NYSP frequencies and will identify as 1H18.