Modi arrived at Max Hospital in Saket at around 9:45 PM and spent around 40 minutes with Jaitley who was re-admitted to hospital for a post surgery check-up on Sunday.
Security was beefed up and heavy police and other security deployment was made in the area.
Modi will embark on a five-day high profile visit to the United States from tomorrow during which he will address the UN General Assembly on September 26 and will hold bilateral talks with President Barack Obama.
According to sources close to the Minister, Jaitley is keeping fine but he is under observation.
Earlier this month, the 61-year-old BJP leader had undergone an elective laproscopic procedure for diabetes management. He was discharged on September 10.