Health & Saf. Code, § 32132

(a) Except as otherwise provided in this section, or in Chapter 3.2 (commencing with Section 4217.10) of Division 5 of Title 1 of the Government Code, the board of directors shall let any contract involving an expenditure of more than twenty-five thousand dollars ($25,000) for materials and supplies to be furnished, sold, or leased to the district, or any contract involving an expenditure of more than twenty-five thousand dollars ($25,000) for work to be done, to the lowest responsible bidder who shall give the security the board requires, or else reject all bids.

Except as otherwise provided in this section, for a local health care district that is a small and rural hospital, as defined in Section 124840, the board of directors shall acquire materials and supplies that cost more than twenty-five thousand dollars ($25,000), but less than fifty thousand dollars ($50,000), through competitive means, except when the board determines either that (1) the materials and supplies proposed for acquisition are the only materials and supplies that can meet the district’s need, or (2) the materials and supplies are needed in cases of emergency where immediate acquisition is necessary for the protection of the public health, welfare, or safety. As used in this paragraph, “competitive means” has the same meaning as used in subdivision (b) of Section 32138.

(b) Subdivision (a) shall not apply to medical or surgical equipment or supplies, to professional services, or to electronic data processing and telecommunications goods and services.

(c) Bids need not be secured for change orders that do not materially change the scope of the work as set forth in a contract previously made if the contract was made after compliance with bidding requirements, and if each individual change order does not total more than 5 percent of the contract.

(d) As used in this section, “medical or surgical equipment or supplies” includes only equipment or supplies commonly, necessarily, and directly used by, or under the direction of, a physician and surgeon in caring for or treating a patient in a hospital.

(e) Nothing in this section shall prevent any district health care facility from participating as a member of any organization described in Section 23704 of the Revenue and Taxation Code, nor shall this section apply to any purchase made, or services rendered, by the organization on behalf of a district health care facility that is a member of the organization.