1. Sir, there are only 2 type of ESI cards-one is Identity Card meant for Insured Person/employee and second is Family Identity Card, which is meant for the family members of an insured person/employee. The detailed procedure has been mentioned in Regulations 17 & 95A of ESI (General) Regulations, 1950. ESIC also issues combined card which include the names of family members also. This is procedural matter.
2. If an Insured Person/employee changes his employment, he is required to get his identity card corrected by concerned Branch Office of ESIC. I think, there is some form for this purpose also which can be obtained from concerned Branch Office. Online facilities to change the code number may also be available, which can be ascertained from concerned Branch Office. If the said insured person will not get his Identity Card/family identity card corrected by entering the code number of new employer in his cards, then he will face problem of getting medical benefit because after close of benefit period, he/his family will not be entitled for any benefit (though the said insured person/employee may still be contributing under ESI Act, 1948 and rules/regulations framed thereunder).
3. When an insured person/employee leaves a factory/organisation and joins new unit, covered under said Act, he must disclose his old insurance number and old code number of previous employer to the concerned officials of his unit, otherwise as mentioned above, he may face disentitlement even for medical facilities after the close of relevant benefit period.