Hyperbaric oxygen treatment pilot program.

Extends the expiration date of the hyperbaric oxygen treatment pilot program for veterans from June 30, 2021, to June 30, 2025. Provides that certain: (1) billing documentation; or (2) attendance documentation; may be used to authenticate the receipt of hyperbaric oxygen treatments for the purpose of payment approval by the department of veterans' affairs. Removes a provision that requires the state department of health to request proposals concerning hyperbaric oxygen treatment from certain geographic areas of Indiana. Specifies that a certain appropriation does not revert to the state general fund until July 1, 2025.