The CBI has booked a man for impersonating a high-ranking official of the Prime Minister's Office and allegedly trying to force an eye hospital chain to "forget" more than Rs 16 crore owed to it by an Indore-based hospital, officials said.

Maayank Tiwari allegedly called and sent messages from his mobile phone asking the promoters of 'Dr Agarwal's' to settle the dispute with the hospital in Indore which allegedly had to return Rs 16 crore to the hospital chain, they said.