David Nierenberg, M.D.
NPI 1851352512ActiveIndividual· Internal Medicine· Tulsa, OK
Internal Medicine (M.D.) in Tulsa, Oklahoma, trained at University of Oklahoma College of Medicine (class of 1985). Their prescriptions cost Medicare Part D more than their services did: $408,224 for 5,582 claims, against $80,352 paid for services in 2024. Pfizer Inc. was the largest of 12 companies reporting payments in 2025, $438.70 in all, mostly food and beverage.
Overview
| NPI | 1851352512 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Mar 31, 2006 |
| Last updated in NPPES | May 24, 2019 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 15739 | OK |
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 - Internal Medicine (OK) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 287 |
|---|---|
| Services billed | 1,527 across 29 procedure codes |
| Paid by Medicare | $80,352 |
Part D prescriptions in 2024
| Prescriptions (claims) | 5,582 · 12,533 30-day fills |
|---|---|
| Patients | 326 |
| Total drug cost | $408,224 |
| Generic share | 88% of claims |
Education and affiliations
| Medical school | University of Oklahoma College of Medicine |
|---|---|
| Graduation year | 1985 |
| Medicare specialty | Internal Medicine |
Hospital affiliations
- Ascension St John Broken ArrowBroken Arrow, OK
- Ascension St John Medical CenterTulsa, OK
- Northeastern Health SystemTahlequah, OK
- Saint Francis Hospital Vinita, IncVinita, OK
- Saint Francis Hospital, IncTulsa, OK
Other facilities
- Vitalcaring GroupHome health agency · Tulsa, OK
Industry payments (Open Payments)
- 2025$438.70 · 25 payments from 12 companies
- 2024$449.40 · 26 payments from 13 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Pfizer Inc. | $100.92 | 6 |
| Iti, Inc. (D/B/A Intra-Cellular Therapies, Inc.) | $74.34 | 4 |
| Azurity Pharmaceuticals, Inc. | $50.16 | 3 |
| Lilly USA, LLC | $48.08 | 3 |
| Sumitomo Pharma America, Inc. | $38.36 | 2 |
What the 2025 payments were for
- Food and Beverage$438.70 · 25 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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