(a) Except as provided by Subsection (b), a physician:
(1) may charge a reasonable fee, as prescribed by board rule, for copying billing or medical records; and
(2) is not required to permit examination or copying of the records until the fee is paid unless there is a medical emergency.
(b) A physician may not charge a fee for copying billing or medical records under Subsection (a) to the extent the fee is prohibited under Subchapter M, Chapter 161, Health and Safety Code.