David W. Grambow, MD
NPI 1235178674ActiveIndividual· Internal Medicine, Cardiovascular Disease· Milwaukee, WI
Internal Medicine, Cardiovascular Disease (MD) in Milwaukee, Wisconsin, trained at Vanderbilt University School of Medicine (class of 1986). Their prescriptions cost Medicare Part D more than their services did: $1,830,011 for 7,569 claims, against $59,963 paid for services in 2024. Pfizer Inc. was the largest of 3 companies reporting payments in 2025, $14,049 in all, mostly speaking and faculty fees.
Overview
| NPI | 1235178674 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 4, 2006 |
| Last updated in NPPES | Jun 12, 2012 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Cardiovascular Disease Primary | 207RC0000X | 28836 | WI |
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 - Interventional Cardiology (WI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 1,008 |
|---|---|
| Services billed | 1,933 across 36 procedure codes |
| Paid by Medicare | $59,963 |
Part D prescriptions in 2024
| Prescriptions (claims) | 7,569 · 18,682 30-day fills |
|---|---|
| Patients | 745 |
| Total drug cost | $1,830,011 |
| Generic share | 80% of claims |
Education and affiliations
| Medical school | Vanderbilt University School of Medicine |
|---|---|
| Graduation year | 1986 |
| Medicare specialty | Interventional Cardiology |
| Secondary specialties | Cardiovascular Disease (Cardiology) |
Medical groups
- Columbia St Marys Hospital Milwaukee IncMilwaukee, WI · 306 clinicians
- Outreach Community Health Centers IncMilwaukee, WI · 53 clinicians
Hospital affiliations
- Ascension All Saints HospitalRacine, WI
- Ascension Columbia St Marys Hospital MilwaukeeMilwaukee, WI
- Ascension Se Wisconsin HospitalMilwaukee, WI
- Ascension St Francis HospitalMilwaukee, WI
- Orthopaedic Hospital of WisconsinGlendale, WI
Industry payments (Open Payments)
- 2025$14,049 · 13 payments from 3 companies
- 2024$39,542 · 42 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Pfizer Inc. | $9,680 | 9 |
| Astrazeneca Pharmaceuticals LP | $4,341 | 3 |
| Glaxosmithkline, LLC. | $27.37 | 1 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$12,200 · 3 payments
- Travel and Lodging$1,600 · 6 payments
- Food and Beverage$249.60 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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