Georgetown University announced yesterday that it was raising tuition for its freshman medical school students by 83 per cent, to $12,500, with similar increases for other students.

The new tuition schedule appears to make Georgetown, the second largest private medical school in the country, the most expensive as well.

Sophomores will be required to pay $10,500, an increase of 94 per cent over the current tuition of $5,400. Juniors will pay $8,750, an increase of about 62 per cent. Seniors will pay $8,250, an increase of about 53 per cent.

The official announcement of the tuition increases, which had been anticipated, was accompanied by a statement by Matthew F. McNulty Jr., chancellor of the Georgetown Medical Center. The statement said that the board of directors "deeply regret" having to raise tuition "in order to maintain a frugal, balanced (no growth) budget and prevent deficit financing."

According to McNulty, the major reason for the increase was the termination by Congress of the District of Columbia Medical and Dental Manpower Act, which had paid direct subsidies to both Georgetown and George Washington University medical schools.

George Washington announced in January that next fall its freshmen would pay $9,000, sophomores $7,500 and juniors and seniors $6,000.

According to figures supplied by the Association of American Medical Colleges, the estimated average tuition at private medical colleges if $5,000.

Howard University's medical school, which is heavily subsidized by U.S. funds, currently charges $1,850 tuition.

Georgetown also announced that freshman dental school tuition would be increased from 5,700 to $8,400, sophomores from $4,700 to $6,800 and juniors and seniors from $4,700 to $5,800.