According to sources, few miscreants entered the hospital and assaulted the doctor, identified as Tikendrajit Sarma.
The incident happened at Kakopather Zonal Primary Health Centre in Doomdooma.
However, the reason behind the assault is yet to be ascertained.
Meanwhile, Dr. Sarma has lodged a complaint against the assailants at Kakopather Police Station.
The police have launched a search operation to catch the assailants.