Michael George Loudin Jr., M.D.
NPI 1932542156ActiveIndividual· Internal Medicine, Gastroenterology· Berkeley, CA
Internal Medicine, Gastroenterology (M.D.) in Berkeley, California, trained at Baylor College of Medicine (class of 2013). 324 Medicare patients in 2024, $81,190 paid; nearly all of their 459 Part D prescriptions were generic (91%). Abbvie Inc. was the largest of 19 companies reporting payments in 2025, $2,137 in all, mostly food and beverage.
Overview
| NPI | 1932542156 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Apr 8, 2013 |
| Last updated in NPPES | Mar 7, 2023 |
| Certified by provider | Oct 26, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | A159541 | CA |
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 - Gastroenterology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 324 |
|---|---|
| Services billed | 721 across 40 procedure codes |
| Paid by Medicare | $81,190 |
Part D prescriptions in 2024
| Prescriptions (claims) | 459 · 734 30-day fills |
|---|---|
| Patients | 148 |
| Total drug cost | $88,325 |
| Generic share | 91% of claims |
Education and affiliations
| Medical school | Baylor College of Medicine |
|---|---|
| Graduation year | 2013 |
| Medicare specialty | Gastroenterology |
| Telehealth | Offers telehealth |
Medical group
- John Muir Physician NetworkPleasant Hill, CA · 494 clinicians
Hospital affiliations
- Contra Costa Regional Medical CenterMartinez, CA
- John Muir Medical Center - Concord CampusConcord, CA
- John Muir Medical Center - Walnut Creek CampusWalnut Creek, CA
Industry payments (Open Payments)
- 2025$2,137 · 82 payments from 19 companies
- 2024$2,314 · 70 payments from 16 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $634.01 | 22 |
| Janssen Biotech, Inc. | $325.01 | 10 |
| Lilly USA, LLC | $231.98 | 8 |
| Takeda Pharmaceuticals U.S.A., Inc. | $160.10 | 8 |
| Ardelyx, Inc. | $156.34 | 6 |
What the 2025 payments were for
- Food and Beverage$2,137 · 82 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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