"Anna complained of acidity, cough and weakness Friday morning and was admitted to Medicity Medanta here in sector 38," a close activist of Hazare said.
"He is stable and his heath is better. He is recovering. He has been kept in an ICU for some private reasons, not for his illness," said a senior doctor at Medanta.
Hazare is scheduled to meet members of Anna Samanwaya Simiti from Haryana on Dec 9.
Hazare, 75, was the face of the India Against Corruption movement, which was launched in December 2010 and united the poor and the middle class against corruption.