Diego A. Diaz, MD
NPI 1942270467ActiveIndividual· Internal Medicine, Pulmonary Disease· New York, NY
Internal Medicine, Pulmonary Disease (MD) with Lifeline Medical Testing PLLC and 1 other group, practicing in New York, New York. Their prescriptions cost Medicare Part D more than their services did: $596,118 for 4,276 claims, against $217,971 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 22 companies reporting payments in 2025, $3,770 in all, mostly food and beverage. Lists Hospital for Special Surgery and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1942270467 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jan 26, 2006 |
| Last updated in NPPES | Jul 13, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Pulmonary Disease Primary | 207RP1001X | 211166 | 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 - Sleep Medicine (NY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 643 |
|---|---|
| Services billed | 22,649 across 37 procedure codes |
| Paid by Medicare | $217,971 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,276 · 7,348 30-day fills |
|---|---|
| Patients | 368 |
| Total drug cost | $596,118 |
| Generic share | 80% of claims |
Education and affiliations
| Graduation year | 1989 |
|---|---|
| Medicare specialty | Sleep Medicine |
| Secondary specialties | Critical Care (Intensivists), Internal Medicine |
| Telehealth | Offers telehealth |
Medical groups
- Lifeline Medical Testing PLLCDix Hills, NY · 2 clinicians
- Diego A Diaz MD PCNew York, NY · 2 clinicians
Hospital affiliations
- Hospital for Special SurgeryNew York, NY
- Lenox Hill HospitalNew York, NY
- Suny/Stony Brook University HospitalStony Brook, NY
Other facilities
- Constellation Home CareHome health agency · Syosset, NY
- Vns of Ny Home Care ChhaHome health agency · New York, NY
Industry payments (Open Payments)
- 2025$3,770 · 203 payments from 22 companies
- 2024$3,251 · 156 payments from 27 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $1,014 | 52 |
| Glaxosmithkline, LLC. | $881.40 | 58 |
| Pfizer Inc. | $339.78 | 22 |
| Regeneron Healthcare Solutions, Inc. | $316.34 | 16 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $159.53 | 8 |
What the 2025 payments were for
- Food and Beverage$3,770 · 203 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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