(a) Except as provided by Section 410.162, discovery is limited to:
(1) depositions on written questions to any health care provider;
(2) depositions of other witnesses as permitted by the administrative law judge for good cause shown; and
(3) interrogatories as prescribed by the commissioner.
(b) Discovery under Subsection (a) may not seek information that may readily be derived from documentary evidence described in Section 410.160. Answers to discovery under Subsection (a) need not duplicate information that may readily be derived from documentary evidence described in Section 410.160.