Sir,
The Insured Persons covered under ESI Act and Rules/Regulations framed thereunder are entitled for benefits (as their legal right) as laid down under said Act provided the procedure laid down under said scheme of Act/rules/regulations is complied with. Your company employee may have his insurance number and identity card and on that basis, he could have contacted authorised ESI Dispensary/IMO concerned and could have obtained the treatment as per procedure laid down. In case the required medical facilities were not available in ESI institutions of the area, the concerned IMO could have referred the patient to the authorised Super Speciality Hospital, where such tie-up arrangements are made.
Now, when the formalities have not been complied with, I am doubtful if any benefit can be claimed at this stage. However, the concerned employee can approach the authorised ESI dispensary of his area with all documents.
In case your employee contacts the ESI Dispensary/IMO, even at this stage, then for future he can avail medical facilities as well as Cash Benefit, if otherwise eligible.
With regards;
Harsh Kumar Mehta