Tex. Health and Safety Code § 161.042

(a) A physician who attends or treats, or who is requested to attend or treat, an overdose of a controlled substance listed in Penalty Group 1 under Section 481.102 or a controlled substance listed in Penalty Group 1-B under Section 481.1022, or the administrator, superintendent, or other person in charge of a hospital, sanitorium, or other institution in which an overdose of a controlled substance listed in Penalty Group 1 under Section 481.102 or a controlled substance listed in Penalty Group 1-B under Section 481.1022 is attended or treated or in which the attention or treatment is requested, shall report the case at once to the department.

(b) A physician or other person who reports an overdose of a controlled substance under this section shall include in the report information regarding the date of the overdose, the type of controlled substance used, the sex and approximate age of the person attended or treated for the overdose or for whom treatment was sought, the symptoms associated with the overdose, the extent of treatment made necessary by the overdose, and the patient outcome. The physician or other person making the report may provide other demographic information concerning the person attended or treated or for whom treatment was sought but may not disclose the person's name or address or any other information concerning the person's identity.

(c) A hospital, sanitorium, or other institution that makes a report under this section is not subject to civil or criminal liability for damages arising out of the report. An individual who makes a good-faith report under this section is not subject to civil or criminal liability for damages arising out of the report.