Thomas Michael Kemmerly, M.D.
NPI 1033476262ActiveIndividual· Internal Medicine, Gastroenterology· Murrieta, CA
Internal Medicine, Gastroenterology (M.D.) in Murrieta, California, trained at University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) (class of 2012). Their prescriptions cost Medicare Part D more than their services did: $893,487 for 1,188 claims, against $80,586 paid for services in 2024. Abbvie Inc. was the largest of 10 companies reporting payments in 2025, $607.03 in all, mostly food and beverage.
Overview
| NPI | 1033476262 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Apr 12, 2012 |
| Last updated in NPPES | Apr 16, 2018 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | A128828 | 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 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 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 | 361 |
|---|---|
| Services billed | 703 across 34 procedure codes |
| Paid by Medicare | $80,586 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,188 · 2,457 30-day fills |
|---|---|
| Patients | 427 |
| Total drug cost | $893,487 |
| Generic share | 77% of claims |
Education and affiliations
| Medical school | University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) |
|---|---|
| Graduation year | 2012 |
| Medicare specialty | Gastroenterology |
Medical group
- Inland Empire Gastroenterology Medical Group, Inc.Murrieta, CA · 6 clinicians
Hospital affiliation
- Loma Linda University Medical Center-MurrietaMurrieta, CA
Industry payments (Open Payments)
- 2025$607.03 · 38 payments from 10 companies
- 2024$653.93 · 37 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $233.29 | 22 |
| Pfizer Inc. | $198.87 | 8 |
| Madrigal Pharmaceuticals | $44.52 | 1 |
| Janssen Biotech, Inc. | $22.24 | 1 |
| Celltrion USA Inc. | $19.94 | 1 |
What the 2025 payments were for
- Food and Beverage$607.03 · 38 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Gastroenterology providers in Murrieta
- 1821245382
- 1770559981
- 1760645121
- 1801229109
- 1356845325
- 1588869382
- 1780950105
- 1851634703
- 1760822191
All Internal Medicine, Gastroenterology providers in California →