Jailed owner Bajaj had moved the High Court challenging a trial court order, which had denied him interim bail on September 3, stating he was already receiving adequate specialised medical treatment.
Investigators are collecting records from various government departments, online portals and associated agencies to reconstruct the hotel's documentary history and determine accountability.
Mishra was arrested on Monday after surrendering before a city court in connection with the devastating fire that killed 22 people, including 13 foreign nationals.
Eight family members had checked into Flourish Stays, the B&B located a few minutes from the hospital, so they could remain close while he underwent treatment.