The POS option applies under
TRICARE Prime only. It gives TRICARE Prime enrollees the freedom
to obtain services from any civilian provider. Under the POS option,
when TRICARE Prime enrollees self-refer to a civilian authorized
provider other than their Primary Care Manager (PCM) or for dates
of service on or after January 1, 2018, all requirements applicable
to health benefits under the CHAMPUS Basic Program (
32 CFR 199.4) shall apply, unless otherwise
stated in this section.