Dr. Kwok is one of the best internist in the San Francisco area. He's been a doctor for many years. This gives him the ability to diagnose your condition on the spot and explain the treatment necessary to correct the situation. Dr. Kwok is never to busy to take the time to talk to you and when necessary, he refers you to specialists that he trusts. He's fluent in both Cantonese and English which is why he has many Chinese patients.