45 C.F.R. § 149.420
(b) Inapplicability of notice and consent exception to certain items and services. The notice and consent criteria in paragraphs (c) through (i) of this section do not apply, and a nonparticipating provider specified in paragraph (a) of this section will always be subject to the prohibitions in paragraph (a) of this section, with respect to the following services:
(1) Ancillary services, meaning—
(c) Notice and consent to be treated by a nonparticipating provider. Subject to paragraph (f) of this section, and unless prohibited by State law, a nonparticipating provider satisfies the notice and consent criteria of this paragraph (c) with respect to items or services furnished by the provider to a participant, beneficiary, or enrollee of a group health plan or group or individual health insurance coverage, if the provider (or a participating health care facility on behalf on a nonparticipating provider)—
(1) Provides to the participant, beneficiary, or enrollee a written notice in paper or, as practicable, electronic form, as selected by the individual, that contains the information required under paragraph (d) of this section, provided such written notice is provided:
(iii) To such participant, beneficiary, or enrollee—
(2) Obtains from the participant, beneficiary, or enrollee the consent described in paragraph (e) of this section to be treated by the nonparticipating provider. An authorized representative may receive the notice on behalf of a participant, beneficiary, or enrollee, and may provide consent on behalf of the participant, beneficiary, or enrollee. For purposes of this section and § 149.410, an authorized representative is an individual authorized under State law to provide consent on behalf of the participant, beneficiary, or enrollee, provided that the individual is not a provider affiliated with the facility or an employee of the facility, unless such provider or employee is a family member of the participant, beneficiary, or enrollee. The consent must—
(d) Information required under written notice. The written notice described in paragraph (c)(1) of this section must be provided in the form and manner specified by HHS in guidance, and must—
(e) Consent described to be treated by a nonparticipating provider. The consent described in this paragraph (e), with respect to a participant, beneficiary, or enrollee of a group health plan or group or individual health insurance coverage who is to be furnished items or services by a nonparticipating provider, must be documented on a form specified by the Secretary, in consultation with the Secretary of Labor, through guidance and provided in accordance with such guidance, that must be signed by the participant, beneficiary, or enrollee before such items and services are furnished and that—
(1) Acknowledges in clear and understandable language that the participant, beneficiary, or enrollee has been—
(f) Language access.