This bill aims to enhance access to mental health and substance use disorder services under Medicare by expanding the existing Medicare health professional shortage area bonus program to specifically incentivize practitioners providing these critical services in underserved areas. The legislation introduces "specified health services," defined as diagnosis, evaluation, or treatment of mental health disorders, or treatment for substance use disorders and co-occurring mental health conditions. For these services, furnished in designated mental health professional shortage areas, the bill increases the bonus payment from the current 10 percent to 15 percent of the service payment amount. Crucially, eligibility for this enhanced bonus is extended beyond physicians to a broader range of applicable practitioners . These applicable practitioners include physician assistants, nurse practitioners, clinical nurse specialists, clinical social workers, clinical psychologists, marriage and family therapists, and mental health counselors. By offering a higher incentive and including more types of providers, the bill seeks to encourage more behavioral health professionals to practice in underserved areas, thereby improving beneficiary access to care.