He goes have walk-in hours, but be prepared to wait for a long time.
I've made multiple appointments, only to have them cancelled the week of. These appointments are made at the time of a visit, for a follow-up, usually about six months out.
If you begin to run out of medication, you are expected to walk-in (which is a very long wait, normally hours long). They did make an exception and give me one months supply, but they couldn't get me an appointment before that ran out. Example: Go to appointment, get six months supply, make follow up appointment. Four days before my follow-up, I am called and told the doctor would not be in, and I had to reschedule. My rescheduled appointment is 44 days away from the current date, but I only get one months prescriptions. So 44 days - 30 pills = bad. He would not give me one more months worth of pills to cover the two weeks. My only option, walk-in.
This would be a pain, but doable, if I was in the state. I travel all over the US for work, and often am not in Texas (primary residence), so I handle most of my business over phone. When I make an appointment six months out, I expect to have that appointment honored. I'm with the other reviews that have had terrible experiences with scheduling conflicts. Dr. Drogin is a great doctor, I agree, but his sporadic hours, appointment cancelling, and staff all need to get a upgrade.