Keith Thomas Diaz, M.D.
NPI 1073771556ActiveIndividual· Internal Medicine, Pulmonary Disease· Staten Island, NY
Internal Medicine, Pulmonary Disease (M.D.) with Amboy Medical Practice PC, practicing in Staten Island, New York. Their prescriptions cost Medicare Part D more than their services did: $651,054 for 1,604 claims, against $115,457 paid for services in 2024. Regeneron Healthcare Solutions, Inc. was the largest of 12 companies reporting payments in 2025, $843.55 in all, mostly food and beverage. Lists NYU Langone Hospitals and 1 other hospital as hospital affiliations.
Overview
| NPI | 1073771556 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | May 30, 2008 |
| Last updated in NPPES | Sep 8, 2014 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Pulmonary Disease Primary | 207RP1001X | 245968 | NY |
| Internal Medicine | 207R00000X | 245968 | NY |
| Internal Medicine, Critical Care Medicine | 207RC0200X | 245968 | NY |
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 (NY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 345 |
|---|---|
| Services billed | 1,004 across 32 procedure codes |
| Paid by Medicare | $115,457 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,604 · 1,960 30-day fills |
|---|---|
| Patients | 225 |
| Total drug cost | $651,054 |
| Generic share | 43% of claims |
Education and affiliations
| Graduation year | 2004 |
|---|---|
| Medicare specialty | Internal Medicine |
| Secondary specialties | Critical Care (Intensivists) |
Medical group
- Amboy Medical Practice PCStaten Island, NY · 173 clinicians
Hospital affiliations
- NYU Langone HospitalsNew York, NY
- Richmond University Medical CenterStaten Island, NY
Industry payments (Open Payments)
- 2025$843.55 · 48 payments from 12 companies
- 2024$733.79 · 35 payments from 9 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Regeneron Healthcare Solutions, Inc. | $177.91 | 6 |
| Astrazeneca Pharmaceuticals LP | $163.60 | 8 |
| Insmed, Inc. | $152.57 | 16 |
| Genzyme Corporation | $98.38 | 3 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $55.88 | 5 |
What the 2025 payments were for
- Food and Beverage$753.49 · 47 payments
- Education$90.06 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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