[2] Das participated in the 2004 Olympic Games where she competed in the singles table tennis competition;[1] she made her second appearance at the event in the 2016 edition after a gap of 12 years.

[14] However, her appearance at the 2016 Olympics short-lived, as she lost to higher seeded Daniela Dodean of Romania in the first round of the women's individual event.

Mouma Das and Manika Batra, the new and heroic women's doubles pair of India, lifted their game by several notches to reach the semi-finals for the first time at an ITTF World Tour (Major).

[18] Later that year, Das made her 50th Final in Annual Inter State & Senior National Table Tennis Championship in Ranchi; she also won gold medal in the team event, where she represented PSPB.

[22] En route to the gold medal, the first by any nation other Singapore, India defeated the top seeded English team in semi-finals.