LOS ANGELES – Kellie Waymire , whose frequent appearances on such shows as “Six Feet Under,” “Friends” and “Ally McBeal” made her a familiar face to television fans, has died at age 36, apparently of a previously undetected medical condition.

Waymire died Nov. 13 at her home in Los Angeles, according to her agent, Billy Miller. He did not disclose what medical condition she had, noting final autopsy results were pending.

Although best known for several TV appearances, including a recurring role on “Six Feet Under” as Melissa the prostitute, Waymire had also gained acclaim for her work in regional theater.

The Los Angeles Times called her performance as the lead in A.R. Gurney’s offbeat play “Sylvia,” at San Diego’s Old Globe Theatre in 1996, “utterly irresistible.” The role, which she performed in San Francisco as well, won her a Drama-Logue Award.

Waymire also appeared in a revival of Noel Coward’s “Present Laughter” at the Pasadena Playhouse in 1998 and in many other stage productions across the country.

She began her television career on the soap opera “One Life to Live,” going on to appear on such shows as “Seinfeld,” “The Practice,” “Judging Amy,” “Star Trek: Voyager,” “Star Trek: Enterprise, “The X-Files” “NYPD Blue” and “CSI: Crime Scene Investigation.”

The Columbus, Ohio, native attended Southern Methodist University, where she won the Greer Garson Award. Later, she earned a master of fine arts degree from the University of California, San Diego.