Television grabs showed injured patients in a separate ward of the DMCH earmarked for earthquake victims with stickers reading 'bhukamp' (earthquake) on their foreheads.
Superintendent of DMCH Shankar Jha today expressed regret and said it would be immediately removed.
When minister in-charge for relief work for Darbhanga district Baidyanath Sahni was drawn to the controversial episode, he told PTI, "I inquired with the DMCH Superintendent on the issue and directed him to get it removed at once."
"I am at present in the interior areas of Darbhanga district and on return, will visit DMCH to look at the matter," he said.
District Magistrate Kumar Ravi described the action as wrong and said he would order immediate removal of the stickers. The DMCH authorities got the tags removed in the evening today.
Nearly 15 earthquake victims had come to the DMCH initially for treatment, out of whom six are still being treated at the hospital.