Nancy G. Mattax, PH.D.
Clinical Psychologist · Springfield, MO
Nancy G. Mattax, PH.D. is a clinical psychologist with a practice address in Springfield, Missouri, and NPI 1154657385, issued on Oct 22, 2009. Check the license (Missouri 01483, as entered in NPPES) with the Missouri board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Nancy G. Mattax
- Credential
- PH.D.
- Primary taxonomy
- Clinical Psychologist 103TC0700X
- License number
- 01483 MO
Self-reported in NPPES; status is on the state search - Practice location
- 2030 S National Ave, Springfield, MO 65804
- Phone
- (417) 820-9590
- Enumerated
- Oct 22, 2009
- Record last updated
- Aug 18, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (417) 820-9592
- Medicare enrollment
- Enrolled (PECOS I20100810001145); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest clinical psychologist records → All 911 in Missouri → Look up another NPI →
Also registered at 2030 S National Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Shawn Freeman, PSY.D.Psychologist1497725147
Verify Nancy G. Mattax in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Missouri board licenses this profession
Search for license 01483Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Mercy Clinic Springfield CommunitiesSpringfield, MO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nancy G. Mattax among 911 clinical psychologist records in Missouri
Nancy G. Mattax, PH.D. is one of 911 clinical psychologist records with a practice address in Missouri. 16% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 50% of them.
- NPI issued2009 · 50% of these records are older, 45% newer
- In a Medicare fileYes · 16% of these records are
- In the CMS Doctors and Clinicians fileYes · 23% of these records are
- Graduated1989 · median 2007 among the 214 with a school on file
- Record last updated2010 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 103TC0700X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
147 clinical psychologist records list a practice address in Springfield
They are 147 of the 6,403 NPPES records with a practice address in Springfield, and 911 clinical psychologist records in Missouri.
All 911 in Missouri → Every provider in Springfield → Clinical Psychologist nationwide →
The 8 clinical psychologist records with the nearest ZIP codes
- Eileen Bartow-Rives, PHD, LPSpringfield, MO 658041669478608
- Sarah Burlingame, PHDSpringfield, MO 658041063408920
- Kimberly Connor, PSYDSpringfield, MO 658041659377562
- Joyce Everson, PSYDSpringfield, MO 658041831197490
- Susan Henderson, MS, LP, BCBASpringfield, MO 658041619975273
- Thomas Heslin, PSYDSpringfield, MO 658041922004795
- Cheryl List, PHD, LPSpringfield, MO 658041053317891
- Sharol McGehee, PSY.D.Springfield, MO 658041902887854
Common questions
What is Nancy G. Mattax, PH.D.'s NPI number?
Nancy G. Mattax, PH.D.'s National Provider Identifier (NPI) is 1154657385, issued on Oct 22, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Nancy G. Mattax, PH.D. located?
The NPPES record lists a practice address at 2030 S National Ave, Springfield, MO, 65804. Phone: (417) 820-9590. Providers update this record themselves, so call before visiting.
How can I verify Nancy G. Mattax, PH.D.'s license?
NPPES lists Missouri license number 01483, as entered by the provider. Search the Missouri board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.