Medical & First Aid
Emergency medical services are provided by rangers on duty. Call 911 in case of an emergency.
Medcor provides facilities at these locations in the park:
Mammoth Clinic
Open Year Round
October 1 - May 30: open Monday through Friday
8:30 am to 5:00 pm (closed for lunch 1:00-2:00 pm);
closed Wednesday afternoons
June 1 -September 30: open Daily
8:30 am to 5:00 pm (closed for lunch 1:00-2:00 pm)
Phone: 307-344-7965
Lake Clinic
May 19- September 30: open Daily 8:30 am to 8:30 pm
with staff on call 7 days a week as needed
Phone: 307-242-7241
Old Faithful Clinic
May 6 - May 15: open Daily
8:30 am to 5:00 pm (closed for lunch 12:00-1:00 pm)
May 16 - September 15: open Daily
7:00 am to 7:00 pm (closed for lunch 12:00-1:00 pm)
with staff on call for life emergencies
September 16 - October 17: open Daily
8:30 am - 5:00 pm (closed for lunch 12:00-1:00 pm)
with staff on call for life emergencies
Phone: 307-545-7325
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