Who should i see for a prolonged ankle sprain: podiatrist or an orthopedic doctor?

Orthopedic doctor: You want to see an orthopedic surgeon who specializes in foot and ankle surgery.

Either: You can see either, they are both qualified.

Ankle sprain: I would see a podiatrist for further evaluation. You could also see a foot/ ankle orthopedist.

Have it evaluated.: See your primary physician and get the appropriate referrals. Both a podiatrist and a foot and ankle orthopedist can help you out.