211.1 Under §21(c) of the Act [§36-320(c), D.C. Code, 1981 ed.], the Office shall conduct the investigation of claims as is necessary to determine all questions concerning a claim including, but not limited to, the following:

1. (a) The fact and degree of disability;
2. (b) Whether the claimant is entitled to compensation;
3. (c) Whether adequate medical care has been provided;
4. (d) Whether adequate vocational rehabilitation has been provided;
5. (e) The necessity, character, and sufficiency of any medical aid furnished;
6. (f) The amount of compensation due an injured employee; and
7. (g) Whether a change in condition has occurred sufficient to justify a review of a previously rendered compensation order.

211.2 The Office may utilize as part of its investigation non-adjudicative fact finding procedures including informal conferences under §219 of this chapter to narrow issues, encourage voluntary payment of claims, and encourage agreement between interested parties.