Plutarco E. Castellanos, MD
NPI 1669463303ActiveIndividual· Internal Medicine, Pulmonary Disease· Leominster, MA
Internal Medicine, Pulmonary Disease (MD) with Mass Lung and Allergy PC, practicing in Leominster, Massachusetts. Their prescriptions cost Medicare Part D more than their services did: $2,184,112 for 4,415 claims, against $386,284 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 21 companies reporting payments in 2025, $2,321 in all, mostly food and beverage. Lists Heywood Hospital - and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1669463303 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Nov 2, 2005 |
| Last updated in NPPES | Oct 6, 2010 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Pulmonary Disease Primary | 207RP1001X | 211028 | MA |
| Internal Medicine | 207R00000X | 211208 | MA |
| Internal Medicine, Critical Care Medicine | 207RC0200X | 211028 | MA |
| Internal Medicine, Allergy & Immunology | 207RA0201X | 211028 | MA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Pulmonary Disease (MA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 1,380 |
|---|---|
| Services billed | 3,772 across 32 procedure codes |
| Paid by Medicare | $386,284 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,415 · 5,904 30-day fills |
|---|---|
| Patients | 622 |
| Total drug cost | $2,184,112 |
Education and affiliations
| Graduation year | 1997 |
|---|---|
| Medicare specialty | Pulmonary Disease |
| Secondary specialties | Critical Care (Intensivists), Internal Medicine |
Medical group
- Mass Lung and Allergy PCLeominster, MA · 10 clinicians
Hospital affiliations
- Heywood Hospital -Gardner, MA
- Marlborough HospitalMarlborough, MA
- Umass Memorial Health - Harrington HospitalSouthbridge, MA
- Umass Memorial Healthalliance HospitalsLeominster, MA
- Umass Memorial Medical Center/University CampusWorcester, MA
Industry payments (Open Payments)
- 2025$2,321 · 133 payments from 21 companies
- 2024$2,006 · 110 payments from 18 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $625.72 | 44 |
| Glaxosmithkline, LLC. | $491.58 | 33 |
| Actelion Pharmaceuticals US, Inc. | $127.96 | 5 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $124.40 | 5 |
| Genzyme Corporation | $115.38 | 6 |
What the 2025 payments were for
- Food and Beverage$2,321 · 133 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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