Certain Contracts of Participating Physician or Provider Not Prohibited
(a) This chapter and this code do not prohibit a physician or provider who is participating in a health maintenance organization delivery network, whether by contracting with a health maintenance organization under Section 843.101 or by subcontracting with a physician or provider in the health maintenance organization delivery network, from entering into a contractual arrangement within a health maintenance organization delivery network described by Subsections (b)—(e).
(b) A physician may contract to provide medical care or arrange to provide medical care through subcontracts with other physicians. A physician may contract to provide through another provider any service that is ancillary to the practice of medicine, other than hospital or other institutional or inpatient provider services.
(c) A provider may contract to provide, or arrange to provide through a subcontract with a similarly licensed provider, any health care service that the providers are licensed to provide, other than medical care.
(d) A provider may contract to provide, or arrange to provide through a subcontract with another provider, a health care service that the provider is not licensed to provide, other than medical care, if the contracted or subcontracted services constitute less than 15 percent of the total amount of services the provider is to provide or arrange to provide.
(e) A contract or subcontract authorized under this section may provide for compensation under:
(1) a fee-for-service arrangement;
(2) a risk-sharing arrangement; or
(3) a capitation arrangement under which a fixed predetermined payment is made in exchange for the provision of, or for the arrangement to provide and the guaranty of the provision of, a defined set of covered services to covered persons for a specified period without regard to the quantity of services actually provided.
See https://statutes.capitol.texas.gov/Docs/IN/htm/IN.843.htm#I