Tourist e-visa for India can be applied for 30 days, ONE year, and FIVE years. It allows multiple entries within a calendar ear. Business e-visa and medical e-visa for India are valid for ONE year and allow multiple entries. The Indian visa online issued by the government of India is nonconvertible and non-extendable. International travelers are not required to show proofs like flight tickets or hotel bookings. Proof of sufficient funds to spend during their stay in India might be helpful. It is advisable to apply SEVEN days, in advance of the arrival date, especially during the peak season, i.e., October to march. Remember to account for the standard immigration process time, which is FOUR business days.
Other than general requirements for an Indian visa for US citizens, you will require to submit the patient name, the visa number or application ID, passport number, date of birth, and the nationality of the medical visa holder.