Donald Robert Westerhausen III, MD
NPI 1437491974ActiveIndividual· Internal Medicine, Pulmonary Disease· Mishawaka, IN
Internal Medicine, Pulmonary Disease (MD) in Mishawaka, Indiana, trained at Indiana University School of Medicine (class of 2013). Their prescriptions cost Medicare Part D more than their services did: $445,565 for 798 claims, against $45,326 paid for services in 2024. Intuitive Surgical, Inc. was the largest of 19 companies reporting payments in 2025, $3,427 in all, mostly food and beverage.
Overview
| NPI | 1437491974 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Mar 22, 2013 |
| Last updated in NPPES | Aug 7, 2023 |
| Certified by provider | Aug 7, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Pulmonary Disease Primary | 207RP1001X | 01076759A | IN |
| Internal Medicine | 207R00000X | 01076759A | IN |
| Internal Medicine | 207R00000X | 125.063787 | IL |
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 - Pulmonary Disease (IN) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 270 |
|---|---|
| Services billed | 778 across 36 procedure codes |
| Paid by Medicare | $45,326 |
Part D prescriptions in 2024
| Prescriptions (claims) | 798 · 1,103 30-day fills |
|---|---|
| Patients | 164 |
| Total drug cost | $445,565 |
| Generic share | 40% of claims |
Education and affiliations
| Medical school | Indiana University School of Medicine |
|---|---|
| Graduation year | 2013 |
| Medicare specialty | Pulmonary Disease |
| Secondary specialties | Critical Care (Intensivists), Internal Medicine |
Medical group
- Saint Joseph Regional Medical Center IncMishawaka, IN · 138 clinicians
Hospital affiliations
- Saint Joseph Regional Medical CenterMishawaka, IN
- Saint Joseph Regional Medical Center - PlymouthPlymouth, IN
Industry payments (Open Payments)
- 2025$3,427 · 84 payments from 19 companies
- 2024$6,896 · 88 payments from 20 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Intuitive Surgical, Inc. | $1,817 | 4 |
| Astrazeneca Pharmaceuticals LP | $427.00 | 21 |
| Glaxosmithkline, LLC. | $255.61 | 21 |
| Regeneron Healthcare Solutions, Inc. | $115.73 | 3 |
| Genzyme Corporation | $111.80 | 3 |
What the 2025 payments were for
- Food and Beverage$1,744 · 81 payments
- Education$1,500 · 1 payment
- Travel and Lodging$182.49 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other pulmonologists in Mishawaka
- 1255316782
- 1225652696