(a) Except as provided in subdivision (b), any member of the board of directors of a nonprofit corporation that is subject to Section 5920 of the Corporations Code, who negotiates the terms and conditions of a sale or transfer of assets, as described in Section 5920 of the Corporations Code, is prohibited from receiving, directly or indirectly, any salary, compensation, payment, or other form of remuneration from the purchasing public benefit corporation or entity following the close of the sale or other transfer of assets. This prohibition shall not apply to any reimbursement or payment made to a member of the board of directors, who is a physician or other health care provider, for direct patient care services provided to patients covered by a health insurer, health care service plan, employer, or other entity that provides health care coverage, and that is owned, operated, or affiliated with the purchasing public benefit corporation or entity, provided that the amounts payable for the services rendered are no greater than the amounts payable to other physicians or health care providers providing the same or similar services. For the purpose of this section, "direct patient care services" means health care services provided directly to a patient, and does not include services provided through an intermediary. Further, in order to qualify for the exemption in this subdivision, the direct patient care services must be health care services that are regularly provided by other physicians or other health care providers in the community who are also receiving reimbursements or payments from the same health insurer, health care service plan, employer, or other entity that is owned or operated by, or affiliated with, the purchasing public benefit corporation or entity.