Dr. Alan C. Newburger, 43, a pediatrician in the Washington area who specialized in nutrition and digestive problems, died of cancer Friday at Georgetown University Hospital.

Dr. Newburger first moved to this area in 1967 and set up a practice in pediatrics in Laurel. Eight years later, he completed a fellowship in pediatric gastroenterology at Johns Hopkins University Hospital in Baltimore.

He then practiced pediatric gastroenterology with offices in Silver Spring. A particular interest of his was nutrition for children and he lectured about this in the Montgomery County public school system and elsewhere. He published numerous articles on nutrition and related matters in professional journals.

He also was an attending physician at Children's Hospital National Medical Center in Washington and at Holy Cross Hospital in Silver Spring. He was a member of the faculty of Georgetown University Medical School.

Dr. Newburger was born in New York City and graduated from the City College of New York. He earned his medical degree at the University of Buffalo and did his internship at Philadelphia General Hospital.

In 1962, he was commissioned in the Navy Medical Corps. He was stationed at San Francisco and then at San Diego, where he completed his residency in pediatrics ath the Naval Hospital. His last tour of duty was as chief of pediatrics at the Naval Hospital in Newport, R.I. He left the service in 1967 and moved here. He lived in Bethesda at the time of his death.

Dr. Newburger was a Fellow of the American Academy of Pedicatrics and of Alpha Omega Alpha, a medical honorary society. He also was a member of Temple Sinai in Washington.

Surviviors include his wife, Beth W., and four children, Mark, Lori, Eric and Jill, all of Bethesda, his parents, Morris and Gertrude Newburger of New York City, and a brother, Leonard, of New York City.

The family suggests that expressions of sympathy be in the form of contributions to Children's Hospital National Medical Center, Washington, D.C.