Chauhan played 40 Tests for India and scored over 2,000 runs.
According to reports, the 72-year-old has been admitted to Sanjay Gandhi PGI hospital in Lucknow.
Remembered fondly as a gritty fighter and one of legendary Sunil Gavaskar's solid opening partners, Chauhan played 40 Tests for India, scoring 2,084 runs at an average of 31.57, including 16 half-centuries. He also played seven ODIs for the country.
Gavaskar and Chauhan aggregated 3022 runs in their 59 opening stands, ten of which were over 100.
In first-class cricket, Chauhan scored 11,143 runs at an average of 40.22 in 179 matches.
After retirement, Chauhan became a Lok Sabha MP in the 1990s, was part of the Delhi cricket administration and is now a minister in the Uttar Pradesh government.
(Inputs from Indian Express)