With a capacity of more than 2,000 beds and more than one million outpatient visits per year, Siriraj is one of the largest[citation needed] and busiest medical centers[citation needed] in Southeast Asia. The medical school accepts about 250 medical students and more than 100 for postgraduate residency training each year. Siriraj is the largest public hospital in Thailand. Thanks to its excellent reputation, its tertiary care unit is the referral center for all hospitals in Thailand.