Hampton Hawes, 48, one of the foremost exponents of modern jazz piano in the 1950s, died Sunday in Los Angeles after suffering a brain hemorrhage.

The pianist had been admitted to Wadsworth Veterans Administration Hospital on May 16, according to officials.

Mr. Hawes first appeared on the national music scene in the early 1950s, making appearances and recording with Dexter Gordon, Howard McGhee and Shorty Rogers. His keyboard style, brittle and percussive, was modeled after that of Bud Powell, though it was not as rhythmically or melodically complex.

The musician became addicted to heroin during this period, and the drug was a scourge that followed him through military service during the Korean war and his subsequent civilian life up to recent years. He kicked the habit in the late 1960.

Mr. Hawes was born Nov. 13, 1928, in Los Angeles, the son of a clergy man. He began piano lessons as a child.

In 1975, the pianist published his autobiography, "Raise Up Off Me," written with Don Asku. It leaned heavily on the excitement of the early years of modern jazz in the 1940s in Los Angeles and Mr. Hawes's fight against drug addiction.

His is survived by his wife, Josie and a stepson, Billy.