Nancy A. Gaston Mattax, PhD

Practice Context in IntroTherapy

• • IntroTherapy lists 292 mental health practices in Springfield. Nancy A. Gaston Mattax, PhD is one of them.
• • 1,321 practices statewide in Missouri are tracked in our directory.
• • Typical psychologist compensation in Missouri: $74,000 – $138,000 (median $85,000). Source: BLS OEWS, state cost-of-labor adjusted.

Data compiled from U.S. state licensing boards, NPI public registry, and verified practice listings. Mental health is a YMYL topic — we prioritize licensed, verified providers only. Methodology & sources · Updated July 2026.