"In its first 100 days, #India's ambitious #AyushmanBharat scheme has provided free care for almost 700,000 people. I applaud Prime Minister @narendramodi and Health Minister @JPNadda for their visionary leadership for #HealthForAll (sic), " Director General Tedros Adhanom Ghebreyesus tweeted.
The ambitious healthcare scheme, touted as the world's largest, aims to benefit more than 10 crore poor families in the country.
He had earlier also praised the Ayushman Bharat-Pradhan Mantri Jan Arogya Yojana, which aims to provide insurance cover of Rs five lakh per annum to 50 crore poor people by calling it a "great commitment".
Hospitals enrolled in this scheme have reached up to 16000 and the number is increasing steadily.
The private sector has enrolled about 50% of hospitals in the scheme.
Prime Minister Narendra Modi has launched this scheme in September last year.
Jaitley said in the first 100 days, 6.85 lakh patients have been provided hospital treatment and 5.1 lakh claims have availed of the scheme, for which payment has been released.