John C. Vassallo, M.D.
NPI 1275590119ActiveIndividual· Internal Medicine· Howell, MI
Internal Medicine (M.D.) with Medical Office of John Vassallo MD PLLC, practicing in Howell, Michigan. Their prescriptions cost Medicare Part D more than their services did: $2,020,759 for 36,068 claims, against $156,521 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 22 companies reporting payments in 2025, $952.94 in all, mostly food and beverage. Lists Trinity Health Ann Arbor Hospital and 1 other hospital as hospital affiliations.
Overview
| NPI | 1275590119 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Apr 26, 2006 |
| Last updated in NPPES | May 11, 2023 |
| Certified by provider | May 11, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | JV078585 | MI |
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 - Internal Medicine (MI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 644 |
|---|---|
| Services billed | 2,768 across 47 procedure codes |
| Paid by Medicare | $156,521 |
Part D prescriptions in 2024
| Prescriptions (claims) | 36,068 · 43,736 30-day fills |
|---|---|
| Patients | 906 |
| Total drug cost | $2,020,759 |
| Generic share | 86% of claims |
Education and affiliations
| Graduation year | 2001 |
|---|---|
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Medical Office of John Vassallo MD PLLCHowell, MI · 7 clinicians
Hospital affiliations
- Trinity Health Ann Arbor HospitalAnn Arbor, MI
- Trinity Health Livingston HospitalHowell, MI
Other facilities
- Care2youHome health agency · Farmington Hills, MI
- Carebridge Home HealthHome health agency · Canton, MI
- Elara CaringHome health agency · Jackson, MI
- Residential Home HealthHome health agency · Troy, MI
- Trinity Health at Home- Southeast MichiganHome health agency · Livonia, MI
- Arbor HospiceHospice · Ann Arbor, MI
- Residential HospiceHospice · Troy, MI
- St Croix HospiceHospice · Troy, MI
- Trinity Health at Home Southeast MichiganHospice · Livonia, MI
- Wellbridge of BrightonNursing home · Howell, MI
- Wellbridge of PinckneyNursing home · Pinckney, MI
Industry payments (Open Payments)
- 2025$952.94 · 53 payments from 22 companies
- 2024$1,083 · 65 payments from 28 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $234.15 | 16 |
| Pfizer Inc. | $90.18 | 5 |
| Novo Nordisk Inc | $82.17 | 5 |
| Lilly USA, LLC | $57.72 | 3 |
| Aimmune Therapeutics, Inc. | $47.48 | 2 |
What the 2025 payments were for
- Food and Beverage$932.72 · 52 payments
- Education$20.22 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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