Requires the legislative services agency to conduct a study of market concentration in Indiana in the health insurance industry, the hospital industry, and five other industries and to present the findings of the study to the combined interim study committees on financial institutions and insurance and public health, behavioral health, and human services, the legislative council, and the governor before December 31, 2022. Prohibits a pharmacy benefit manager (PBM) from: (1) imposing limits on a pharmacy’s access to medication that differ from those existing for a PBM affiliate; or (2) sharing any covered individual’s information, except as permitted by the federal Health Insurance Portability and Accountability Act (HIPAA). Prohibits the inclusion of certain provisions in a contract between a PBM and an entity authorized to participate in the federal 340B Drug Pricing Program, with certain exceptions. Requires a PBM: (1) to update the PBM’s maximum allowable cost list at least every seven days; (2) to determine that a prescription drug is not obsolete, is generally available for purchase by pharmacies, and is not temporarily unavailable, listed on a drug shortage list, or unable to be lawfully substituted before placing the prescription drug on a maximum allowable cost list. Provides that: (1) if a PBM approves an appeal concerning maximum allowable cost pricing, the PBM must notify each pharmacy in the PBM’s network that the maximum allowable cost for the drug has been adjusted; and (2) if a PBM denies an appeal, the PBM must provide the reason for the denial and other information, and the appealing pharmacy or other entity may then file a complaint with the department of insurance (department). Also allows a contracted pharmacy or pharmacy services administrative organization to file a complaint with the department if it believes that its contract with a PBM contains an unlawful contractual provision. Provides that a PBM’s violation of these requirements or prohibitions is an unfair or deceptive act or practice in the business of insurance. Amends code sections requiring an insurer to “deliver” or “provide” certain notices within a certain time period to make those sections provide instead that the insurer is required to “mail” the notices.