CalSTRS does not provide health or dental insurance coverage as they are collectively bargained at the local school district level. Under California Education Code sections 7000-7008, school districts, community colleges and county offices of education must offer retiring CalSTRS members and their spouses or registered domestic partners the opportunity to continue their medical and dental insurance at their own cost.
Each district has its own policies. Coverage may also be part of your union contract, so your benefits may differ from others in your district. Contact your employer to learn if you will have any health benefits in retirement. Consider setting aside extra money now for your future health benefits.