Is 19 at the bottom of Tianjin social security card the card number of medical insurance card?

Yes The card number of Tianjin social security card is located in the middle and lower part of the front of the medical insurance card, and 19 at the bottom is the medical insurance card number. The social security card is a "multi-purpose, national" composite card with financial debit card function, which is approved by the municipal government and made in accordance with the Technical Specification for Social Security (Personal) Cards in Ministry of Human Resources and Social Security and the relevant standards of the People's Bank of China and China UnionPay.