Treating source refers to a physician, psychologist, or any other acceptable medical practitioner who, apart from examining a patient, has or had an ongoing treatment relationship with the patient. Only those medical providers with a past history of providing treatment to the individual applying for disability benefits are considered to be treating sources by the United States Social Security Administration (SSA).
Justipedia explains Treating Source
While applying for Social Security Income (SSI) or Social Security Disability Insurance (SSDI) disability benefits, the U.S. Social Security Administration (SSA) requires that individuals furnish their most recent medical records from their treating source. The treating sources are the medical practitioners who provided or are providing treatment to the individual seeking disability benefits. All licensed physicians, podiatrists, psychologists, optometrists, psychiatrists, and speech language pathologists are considered acceptable treating sources by the SSA. The evidence, records, and testimony provided by an individual’s treating source are given great importance in an individual’s SSI or SSDI hearing.