The announcement could also help solidify the governor’s support among gay voters in his bid for re-election this year.

Though the advocacy community helped develop much of the plan, some AIDS experts raised concerns that it would be more easily said than done. “Having it as a goal is not really the same as accomplishing it,” said Dr. Donna Futterman, director of the adolescent AIDS program at Children’s Hospital at Montefiore Medical Center in the Bronx.

She said that while the goal was “fantastic,” parts of the plan seemed to be simply tinkering with past policies. It also would be dependent upon having the money and will to persuade patients to be tested and treated.

Dr. Frederick P. Siegal said he had tried to institute universal treatment when he was medical director of the AIDS Center at St. Vincent’s, the now-shuttered hospital in Greenwich Village, a neighborhood at the center of the AIDS epidemic. “It turned out it wasn’t so simple because a lot of people were just not adherent,” he said. “I think in a way that is the biggest problem, getting people to take their medications reliably.”

Dr. Futterman said she would like to see more focus on reaching young people 18 to 24 years old and young black and Hispanic gay and bisexual men, who she said are most at risk and who are the least likely to know whether they are infected.

In New York, of an estimated 154,000 people infected with H.I.V., 22,000 do not know they have it, state officials said. Of the 132,000 who know they have it, 64,000 need treatment to suppress the virus.

The Cuomo administration said $5 million had been dedicated to the plan through Medicaid and the state’s AIDS Institute, and the effort would be a priority in the next budget cycle.