Sec. 120. (a) "Insurer", for purposes of the statutes listed in subsection (b), means an insurance company, a health maintenance organization (as defined in IC 27-13-1-19), a self-funded employee benefit plan, a pension fund, a retirement system, or a similar entity that:
(1) does business in Indiana; and
(2) is under an obligation to make payments for medical services as a result of injury, illness, or disease suffered by an individual.
(b) This section applies to the following statutes:
(1) IC 12-14-1 through IC 12-14-8.
(2) IC 12-15, except IC 12-15-32, IC 12-15-33, and IC 12-15-34.