Texas Occupations Code - OCC § 156.008. Practicing Medicine Without Registration Prohibited

(a) Practicing medicine after the expiration of the 30-day grace period under Section 156.004 following expiration of a registration permit that has not been renewed for the current registration period as provided by this subchapter has the same effect as, and is subject to all penalties of, practicing medicine without a license.

(b) In a prosecution for the unlawful practice of medicine, the receipt showing payment of the registration fee required by this chapter does not constitute evidence that the receipt holder is lawfully entitled to practice medicine.