Anthony Dai Duk, MD
NPI 1154439131ActiveIndividual· Psychiatry & Neurology, Psychiatry· Redlands, CA
Psychiatry & Neurology, Psychiatry (MD) in Redlands, California, trained at Loma Linda University School of Medicine (class of 2001). Their prescriptions cost Medicare Part D more than their services did: $436,501 for 4,883 claims, against $27,424 paid for services in 2024. Otsuka America Pharmaceutical, Inc. was the largest of 19 companies reporting payments in 2025, $4,032 in all, mostly food and beverage.
Overview
| NPI | 1154439131 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Aug 29, 2006 |
| Last updated in NPPES | Sep 15, 2011 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Psychiatry & Neurology, Psychiatry Primary | 2084P0800X | A80755 | CA |
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 (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 97 |
|---|---|
| Services billed | 376 across 6 procedure codes |
| Paid by Medicare | $27,424 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,883 · 7,428 30-day fills |
|---|---|
| Patients | 311 |
| Total drug cost | $436,501 |
| Generic share | 96% of claims |
Education and affiliations
| Medical school | Loma Linda University School of Medicine |
|---|---|
| Graduation year | 2001 |
| Medicare specialty | Psychiatry |
| Telehealth | Offers telehealth |
Medical group
- Inland Psychiatric Medical Group IncRedlands, CA · 123 clinicians
Industry payments (Open Payments)
- 2025$4,032 · 207 payments from 19 companies
- 2024$2,307 · 118 payments from 19 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Otsuka America Pharmaceutical, Inc. | $598.70 | 31 |
| Abbvie Inc. | $598.29 | 31 |
| Teva Pharmaceuticals USA, Inc. | $521.06 | 27 |
| Alkermes, Inc. | $471.57 | 22 |
| E.R. Squibb & Sons, L.L.C. | $412.38 | 25 |
What the 2025 payments were for
- Food and Beverage$4,026 · 206 payments
- Education$5.45 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 53 psychiatrists in Redlands · All psychiatrists in California