What do employers need to consider regarding Social Security and Medicare? The Social Security program was created by the federal Social Security Act. It is a worker-employer-government insurance program, covering benefits for retirement, survivors, disability, and Medicare. Employers withhold two separate taxes from employees’ paychecks. One is the Social Security tax, and the other is the Medicare tax. Medicare, which is funded through taxes, provides health insurance for people age 65 or older and many people with disabilities. Medicare consists of Parts A (hospital insurance), B (medical insurance), and C (Medicare Advantage), which offer additional preventive health benefits and patient protections. In 2006, Medicare began offering prescription drug plans, known as Part D.