Texas Insurance Code - INS § 1369.603. Reduction of Certain Claim Payment Amounts Prohibited

(a) A health benefit plan issuer or pharmacy benefit manager may not directly or indirectly reduce the amount of a claim payment to a pharmacist or pharmacy after adjudication of the claim through the use of an aggregated effective rate, quality assurance program, other direct or indirect remuneration fee, or otherwise, except in accordance with an audit performed under Subchapter F.

(b) Nothing in this section prohibits a health benefit plan issuer or pharmacy benefit manager from increasing a claim payment amount after adjudication of the claim.