You may go thru the sequence of events;
IRDAI pushes back Aadhaar-insurance policy linkage deadline to March 31
https://www.businesstoday.in/current/policy/irdai-aadhaar-insurance-policy-linking-deadline-extension-march-31/story/266278.html
The Insurance regulator has notified all the policy offering organisations including the health insurance offering companies that the policyholders should submit Aadhaar and PAN only by March 31, 2018. Even for renewing the policy, the policyholders need not submit the Aadhaar card.
However there have been instances where health insurance offering organisations have asked for the 12-digit Aadhaar number. The news from the Insurance Regulatory Development Authority has bought in clarity in the procedure. As the last date is nearing soon, everyone is applying for an Aadhaar card to link their policies with it to avoid locking their policy.
16 January 2018
https://www.bankbazaar.com/aadhar-card/how-to-link-aadhar-card-to-insurance-policies.html
https://economictimes.indiatimes.com/wealth/personal-finance-news/irda-makes-aadhaar-mandatory-for-insurance-policies/articleshow/61565808.cms
https://www.moneycontrol.com/news/economy/policy/irdai-makes-it-mandatory-for-individuals-to-link-existing-policies-with-aadhaar-2433257.html
https://profit.ndtv.com/news/insurance/article-aadhaar-not-mandatory-for-insurance-says-irdai-1734694
https://www.egazette.nic.in/WriteReadData/2017/176407.pdf
https://www.vidalhealthtpa.com/home/Forms/tab0/textBlock_files/file19/Know%20Your%20Customer(KYC)%20Norms.pdf
You may check with IRDA…