(a) The procedures for appealing an adverse determination must require written notice to the appealing party of the determination of the appeal as soon as practicable, but not later than the 30th calendar day, after the date the utilization review agent receives the appeal.

(b) If the appeal is denied, the notice must include a clear and concise statement of:

(1) the clinical basis for the denial;

(2) the specialty of the physician or other health care provider making the denial; and

(3) the appealing party’s right to seek review of the denial by an independent review organization under Subchapter I and the procedures for obtaining that review.

See https://statutes.capitol.texas.gov/Docs/IN/htm/IN.4201.htm