Most healthcare providers will ask for your Social Security number when you seek medical attention. They often require it to be able to collect payment for health care services and verify your identity when it comes to searching your medical records. When my husband said he didn't want to give out the number, he was told that the dentist needed it for identification and insurance purposes. My husband went to a new dentist and on the forms you fill out when you see a new doctor there is a space for a Social Security number.
So why would the new dentist want your husband's Social Security number if he already gave him his insurance information? Nabil Istafanos, Vice President of Compliance and Ethics at Premera, says that the Social Security number is often needed “when coordinating benefits between different insurance companies.