Zocdoc will begin

charging doctors throughout New York state for each new patient who books an appointment using its service instead of a monthly fee, effective April 1. The company wants to make the service more attractive to doctors with fewer patients, who were dissuaded from signing up by the $300 per month, or $3,000 a year, fee per physician. Existing patient bookings won’t trigger a charge. The new per-booking charge will vary by specialty, from $35 to $110, with primary-care doctors on the low end of the spectrum, and dentists at the highest tier.