David Dakin Williams, M.D., PH.D.
NPI 1346374998ActiveIndividual· Psychiatry & Neurology, Psychiatry· Manchester, NH
Psychiatry & Neurology, Psychiatry (M.D., PH.D.) in Manchester, New Hampshire, trained at University of Alabama School of Medicine (class of 2004). Their prescriptions cost Medicare Part D more than their services did: $153,205 for 1,499 claims, against $22,765 paid for services in 2024. Lundbeck LLC was the largest of 4 companies reporting payments in 2025, $123.08 in all, mostly food and beverage.
Overview
| NPI | 1346374998 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D., PH.D. |
| Sole proprietor | No |
| NPI issued | Mar 15, 2007 |
| Last updated in NPPES | Dec 6, 2021 |
| Certified by provider | Dec 6, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Psychiatry & Neurology, Psychiatry Primary | 2084P0800X | 14951 | NH |
| Psychiatry & Neurology, Child & Adolescent Psychiatry | 2084P0804X | 14951 | NH |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Psychiatry (NH) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 60 |
|---|---|
| Services billed | 238 across 7 procedure codes |
| Paid by Medicare | $22,765 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,499 · 2,628 30-day fills |
|---|---|
| Patients | 119 |
| Total drug cost | $153,205 |
| Generic share | 96% of claims |
Education and affiliations
| Medical school | University of Alabama School of Medicine |
|---|---|
| Graduation year | 2004 |
| Medicare specialty | Psychiatry |
| Telehealth | Offers telehealth |
Medical group
- The Mental Health Center of Greater ManchesterManchester, NH · 84 clinicians
Industry payments (Open Payments)
- 2025$123.08 · 7 payments from 4 companies
- 2024$31.47 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Lundbeck LLC | $68.34 | 4 |
| Janssen Scientific Affairs, LLC | $26.27 | 1 |
| Neurocrine Biosciences, Inc. | $14.30 | 1 |
| Takeda Pharmaceuticals U.S.A., Inc. | $14.17 | 1 |
What the 2025 payments were for
- Food and Beverage$123.08 · 7 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 44 psychiatrists in Manchester · All psychiatrists in New Hampshire