India's health ministry is likely to see a substantial increase in funding, after it warned that its programmes were short of cash and sought more than $1.2 billion in additional money, according to government officials and documents seen by Reuters.

The final numbers could change when Finance Minister Arun Jaitley presents the budget for fiscal 2017-18 on Wednesday. But one official familiar with the numbers said the health ministry is expected to get a $1.5 billion, or 27 per cent, increase in funding to around $7 billion.

The health and finance ministries did not respond to requests for comment.

An increase in the budget allocation, if finalised, would signal an acknowledgement from Prime Minister Narendra Modi's administration that the country needs to ramp up spending on the sector.