ESI Sub code - selecting the dispensary nearer to our working area?

Respected seniors
This is Ramu working as Dy..Manager-HR in manufacturing sector. I need one clarification on ESI Sub-code. We have engaged one contractor and he is having ESI code at his registered office which is other district. Is it mandatory to get ESI sub-code ? Can he enroll the manpower in main code and selecting the dispensary nearer to our working area?
Kindly give your valuable suggestions on this issue
Ramu

Dear Mr Ramu, it is not mandatory to obtain ESI Sub Code #.But, for the sake of administrative convenience, it is advisable to obtain sub code #.The Contractor can cover his Employees under ESI in the existing ESI Code #.The ESI Dispensary is selected based on the Residence of ESI Covered Employee.ESI Covered Employee can avail treatment from other dispensaries also, since, now it is online.Employer should have remitted ESI Contribution.