California Code, Health and Safety Code - HSC § 1368.5

(a) Every health care service plan that offers coverage for a service that is within the scope of practice of a duly licensed pharmacist shall pay or reimburse the cost of the service performed by a pharmacist at an in-network pharmacy or a pharmacist at an out-of-network pharmacy if the health care service plan has an out-of-network pharmacy benefit.

(b) Payment or reimbursement may be made pursuant to this section for a service performed by a duly licensed pharmacist only when all of the following conditions are met:

(c) Nothing in this section shall require the plan to pay a claim to more than one provider for duplicate service or be interpreted to limit physician reimbursement.