Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Gregory Warren Mattingly, MD

Individual provider Psychiatry Physician · NPI 1215933379

Gregory Warren Mattingly, MD is a Psychiatry in Saint Charles, Missouri. Graduated from Washington University School of Medicine in 1989, 37 years ago. Practices with St Charles Psychiatric Associates, Inc, an 8-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Missouri.

Years since qualifying
37
Trained at
Washington University School of Medicine
Licensed in
MO
In the registry since
2005
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

330 1st Capitol Dr Ste 390
Saint Charles, MO 63301-2852
Phone: (636) 949-5760
Fax: (636) 949-0729
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Psychiatry Physician (primary) Taxonomy 2084P0800X · Licence 102964 (MO)

Record details

NPI number1215933379
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJune 23, 2005
Last updated in NPPESJanuary 26, 2017

Medicare enrollment

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

Medicare specialtyPSYCHIATRY
Medical schoolWASHINGTON UNIVERSITY SCHOOL OF MEDICINE
Graduated 1989 (37 years in practice)
Group practice St. Charles Psychiatric Associates, Inc. — 8 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations2 on file with Medicare

Other providers in Saint Charles