Tuition at the Medical and Dental Schools will increase by 14.1 per cent next year, from $7800 to $8900, Medical School officials said last week.

Inflation and energy costs are two major reasons for the hike, which the Corporation approved last Tuesday, Dr. Daniel D. Federman '49, dean of students and alumni at the Med School, said yesterday.

The jump is slightly lower than the 15-per-cent average increases at Harvard's other graduate schools, 6 per cent lower than last year's Med School hike which changed the trend of very low increases that prevailed during years when lower costs and support from endowment income and alumni gifts helped keep tuition levels down, Dr. I. Leon Dogon, associate administrative dean at the Dental School, said yesterday.

Concerned

Federman also said the Dental and Med schools are concerned about changes in the federal student loan program that the Reagan administration has proposed. The schools' financial aid programs depend heavily on the student loan program, he added.

The Med School plans to increase financial aid to keep up with the tuition increase, Federman said, adding, however, that there is no evidence that students admitted would decide not to attend because of tuition. "Nobody has ever left the school for financial reasons," he said.

Although tuition accounts for only about 7 per cent of the schools' total income. the increase is necessary because income from endowments has grown much more slowly than the rate of inflation, Dogon and Federman said.

The total yearly cost for a Med School student will average about $16,000 a year for tuition plus living expenses, Dr. Carola Eisenberg, dean for student affairs said yesterday.

Costs at the Dental School are similar to those at the Med School, but students there must pay an additional $1200 for instrument rental and purchase fees.