Practo is an online service which helps patients book instant doctor appointments. Practo has the largest directory of Indian Doctors in fields like dentistry, dermatology, cardiology and the like. With more than 25000 doctors and thousands of appointments booked online, Practo has become a leader in Book Doctor Appointment online health care services. All patients and doctors are notified about the booked appointment via SMS and in case the patient finds any difficulty while booking an appointment he or she can do it by calling Practo's helpline number.