Social Security keeps personal and confidential information - names,
Social Security numbers, earnings records, ages and beneficiary addresses - for millions of people. Generally, they will discuss your information only with you. When you call or visit Social Security, they will ask you several questions to help verify your identity. If you want someone else to help with your Social Security business, the agency needs your permission to discuss your information with that person.
Please be careful with your Social Security number and to protect its confidentiality whenever possible.
Social Security is committed to protecting the privacy of your records. When required by law to give information to other government agencies that administer health or welfare programs, such as Medicaid and food stamps, those agencies are not allowed to share that information with anyone else.
Social Security Handbook