For any emergency, in Oltre il Colle as everywhere in Lombardy, the number is 112. A single answering centre takes the call, the one in Varese for the province of Bergamo: it locates the call, works out what is needed and passes it to the medical rescue service, the Carabinieri, the police or the fire brigade. The call reaches the same centre even if you dial 118, 113 or 115, and it is free from landlines and mobiles.
There are nine defibrillators mapped in the municipality: eight in AREU's regional register, the one the centre uses to guide callers to the nearest, and one on OpenStreetMap only. Six are listed as available 24 hours a day in publicly accessible places; one is in a cooperative's infirmary, always available according to AREU; two are inside sports facilities: the ticket office of the cross-country track, open in season, and the changing room of the sports ground, for which AREU gives no hours. The full list, with the exact spot, is below.
In the mountains the number does not change: mountain rescue too is called through 112, and its VI Orobic Delegation has a station right in Oltre il Colle. The Croce Verde Oltre il Colle Val Serina, the valley's public assistance association, provides ambulance rescue and medical transport.