American Ballet Theatre star Patrick Bissell, who was found dead in his Hoboken, N.J., apartment Dec. 29, was killed by an extensive combination of drugs and other substances. An autopsy report released yesterday showed that the dancer had overdosed on cocaine, codeine and methadone. Other substances found in his body included ethanol, painkillers and salicylate, a component of aspirin.

Bissell went to the Betty Ford Center in California last summer and reportedly was "dried out" when he left the substance abuse program there in August. At the time of his death, Bissell's family said the 30-year-old dancer had been having trouble handling the pressure of the highly competitive dance world. The Hudson County, N.J., prosecutor's office said yesterday that the case was being closed because it was unlikely investigators could trace the source of the drugs. Out and About

No matter what desperate Democrats might say or how much anyone might wish otherwise, Gov. Mario Cuomo is consistent in saying he will not be a presidential candidate of any kind -- dark horse, favorite son or convention choice. He further established his commitment not to run when he accepted an invitation to address the annual Gridiron Dinner here March 26. Cuomo made it a condition for accepting the invitation that he be introduced to the august body of selected journalists and political leaders only as "governor of New York" and in no way be referred to as a possible presidential nominee ...

Playgoers at New Playwrights' Theatre were in for a bonus Tuesday night when country-western singer Jerry Jeff Walker and Austin musician Steve Fromholtz showed up to see "The Night Hank Williams Died." Friends of the play's author, Larry L. King, the two performers took to the stage and sang until long after midnight ...

Singer Pearl Bailey, who has never been shy about tooting her own horn, will celebrate her 70th birthday in the program "In Performance at the White House: A Salute to Broadway" program on Feb. 28. Other performers that evening will include Jerry Orbach, Larry Kert and Judy Kuhn. The WETA show will be broadcast later over PBS. Bailey, who has been in show business for 55 years, has been at the White House so often that one almost expects to see her portrait hanging there. She also has her own special style, and when she was introduced to Soviet leader Mikhail Gorbachev during his recent visit here, she called him "honey," and he loved it ...

The Colnaghi USA Ltd. art gallery in New York City was hit earlier this month by thieves who escaped with some $6 million in paintings and drawings. The gallery is now offering a sizable 10 percent reward for the recovery of the 28 stolen items. Nicholas Hall, president of the company, which was established in 1760 in London, says this was the most significant break-in in the firm's long history. Among the works were two Fra Angelico paintings valued at $4 million ...