Understanding ESI Benefits and Contribution Periods
For different ESI benefits, conditions vary. One can avail of benefits in the "Benefit period" if one has contributed during the "Contribution period." From April 1 to September 30 and October 1 to March 31 are the contribution and benefit periods. To enjoy sickness benefits, one needs to pay contributions for at least 90 days in the corresponding contribution period. Additionally, there is a limit to the benefits.
If you can get ESIS, i.e., IMO (Insurance Medical Officer), to refer you to private medical services, you can claim the expenses incurred. In an extreme emergency, you may seek services from a private practitioner for the shortest possible period, and then you can apply for reimbursement, which may or may not be considered. If you can justify the expenses, you can get reimbursement.