Gregory Warren Mattingly, M.D.
NPI 1215933379ActiveIndividual· Psychiatry & Neurology, Psychiatry· Saint Charles, MO
Psychiatry & Neurology, Psychiatry (M.D.) in Saint Charles, Missouri, trained at Washington University School of Medicine (class of 1989). Their prescriptions cost Medicare Part D more than their services did: $781,511 for 5,517 claims, against $29,014 paid for services in 2024. Axsome Therapeutics, Inc. was the largest of 28 companies reporting payments in 2025, $1,012,688 in all, mostly speaking and faculty fees.
Overview
| NPI | 1215933379 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Jun 23, 2005 |
| Last updated in NPPES | Jan 26, 2017 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Psychiatry & Neurology, Psychiatry Primary | 2084P0800X | 102964 | MO |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Psychiatry (MO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 141 |
|---|---|
| Services billed | 432 across 7 procedure codes |
| Paid by Medicare | $29,014 |
Part D prescriptions in 2024
| Prescriptions (claims) | 5,517 · 7,906 30-day fills |
|---|---|
| Patients | 409 |
| Total drug cost | $781,511 |
| Generic share | 90% of claims |
Education and affiliations
| Medical school | Washington University School of Medicine |
|---|---|
| Graduation year | 1989 |
| Medicare specialty | Psychiatry |
| Telehealth | Offers telehealth |
Medical group
- St. Charles Psychiatric Associates, Inc.Saint Louis, MO · 8 clinicians
Industry payments (Open Payments)
- 2025$1,012,688 · 887 payments from 28 companies
- 2024$842,175 · 832 payments from 28 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Axsome Therapeutics, Inc. | $172,023 | 123 |
| Neurocrine Biosciences, Inc. | $130,424 | 101 |
| Abbvie Inc. | $120,029 | 113 |
| Iti, Inc. (D/B/A Intra-Cellular Therapies, Inc.) | $99,639 | 86 |
| Otsuka America Pharmaceutical, Inc. | $96,398 | 107 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$458,191 · 132 payments
- Honoraria$253,228 · 54 payments
- Consulting Fee$155,418 · 50 payments
- Travel and Lodging$123,005 · 278 payments
- Food and Beverage$17,561 · 363 payments
- Compensation for serving as faculty or as a speaker for a medical education program$5,225 · 4 payments
- Education$60.28 · 6 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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