Long Island Rep. Lee Zeldin, the likely Republican nominee in next year’s governor’s race, said Saturday that he has been diagnosed with cancer — and is in remission after nine months of treatment.

“My health is phenomenal and I continue to operate at 110%,” Zeldin, 41, said in a statement released by his campaign.

The four-term congressman from Suffolk County was found to have early stage chronic myeloid leukemia in November, he said, and immediately began “targeted therapy.”

The statement included a note from Zeldin’s hematologist, Dr. Jeffrey Vacirca, who said that his patient’s prognosis was good.

“Successfully treated early chronic myeloid leukemia is now a chronic disease, which carries a normal life expectancy,” Vacirca said.

Zeldin, who is on a six-county campaign swing this weekend, first revealed his cancer status during an Ontario County fundraising event Friday night, according to reports.