"We want reform, but not the heap of junk that's in this bill," Schwartz said.
He expects that message will resonate with moderates and Blue Dog conservative Democrats who might still be on the fence about support for the House plan.
In New Jersey, hundreds of activists and concerned citizens piled into four tour buses to make the early morning trip to Washington.
During the ride south, Linda Giresi of Union, N.J., issued a warning to Democrats. "We're going to boot them the heck out next year and we're going to delay this bill," she said, eliciting impromptu cheers from people seated around her.
"The Democrats do not have the American people and their best interest at heart. ... [The bill is] a big ripoff, it's a scam, it's a big power grab. They want to dominate and control ... and we're sick of it!"
Janine Vorhees, who was also aboard the bus with her mother, Loretta, and her teenage son, Alexander, said she likes her health care plan and wants to keep it.
"We are fed up and teed off," she told ABC News. "The Constitution does not say we should provide health care. We believe in free market. No government program is ever effective."
In North Carolina, Dallas Woodhouse, state director of Americans for Prosperity there, told ABC News today's initiative began as a local one. "The idea was to go to district offices of the House members at noon today all across the country," he said.
Woodhouse was leading a group of conservatives to the Raleigh, N.C., office of Sen. Kay Hagan, a Democrat.
Elsewhere on the Hill today, protesters of a different sort briefly occupied the office of Sen. Joe Lieberman, the independent Democrat, to challenge his opposition to a universal health care system.
ABC News' Rick Klein, John Parkinson, Rolake Bamgabose and Z. Byron Wolf contributed to this report.