Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Dr. Nancy G. Mattax, PHD

Individual provider Clinical Psychologist · NPI 1154657385

Dr. Nancy G. Mattax, PHD is a Clinical Psychologist in Springfield, Missouri. Qualified in 1989, 37 years ago. Practices with Mercy Clinic Springfield Communities, a 1,126-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Missouri.

Years since qualifying
37
Licensed in
MO
In the registry since
2009
What do these letters mean?
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

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Practice location Address checks out

2030 S National Ave Ste 105
Springfield, MO 65804-2222
Phone: (417) 820-9590
Fax: (417) 820-9592
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Psychologist (primary) Taxonomy 103TC0700X · Licence 01483 (MO)

Record details

NPI number1154657385
Entity typeIndividual (Type 1)
GenderFemale
Credentials PHD
Sole proprietorNo
NPI enumeratedOctober 22, 2009
Last updated in NPPESAugust 18, 2010

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCLINICAL PSYCHOLOGIST
Medical schoolOTHER
Graduated 1989 (37 years in practice)
Group practice Mercy Clinic Springfield Communities — 1126 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

Other providers in Springfield