Garth B. Tanner, MD
NPI 1184612624ActiveIndividual· Internal Medicine· Modesto, CA
Internal Medicine (MD) in Modesto, California, trained at Loma Linda University School of Medicine (class of 1996). Their prescriptions cost Medicare Part D more than their services did: $1,605,575 for 16,153 claims, against $93,794 paid for services in 2024. Amgen Inc. was the largest of 18 companies reporting payments in 2025, $1,151 in all, mostly food and beverage.
Overview
| NPI | 1184612624 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Oct 10, 2005 |
| Last updated in NPPES | Jul 12, 2012 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A64407 | CA |
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 - Internal Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 311 |
|---|---|
| Services billed | 1,396 across 35 procedure codes |
| Paid by Medicare | $93,794 |
Part D prescriptions in 2024
| Prescriptions (claims) | 16,153 · 33,529 30-day fills |
|---|---|
| Patients | 886 |
| Total drug cost | $1,605,575 |
| Generic share | 86% of claims |
Education and affiliations
| Medical school | Loma Linda University School of Medicine |
|---|---|
| Graduation year | 1996 |
| Medicare specialty | Internal Medicine |
Hospital affiliations
- Doctors Medical CenterModesto, CA
- Emanuel Medical CenterTurlock, CA
- Memorial Medical CenterModesto, CA
- Oak Valley Hospital DistrictOakdale, CA
Other facilities
- Careone Home Health and Hospice, IncHome health agency · Salida, CA
- Compassionate Care Home Health Agency, LLCHome health agency · Fresno, CA
- Sutter Care at HomeHome health agency · Salida, CA
Industry payments (Open Payments)
- 2025$1,151 · 54 payments from 18 companies
- 2024$1,917 · 103 payments from 22 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $174.53 | 7 |
| Corcept Therapeutics | $136.93 | 8 |
| Novo Nordisk Inc | $113.10 | 5 |
| Bayer Healthcare Pharmaceuticals Inc. | $99.49 | 4 |
| Exact Sciences Corporation | $85.85 | 3 |
What the 2025 payments were for
- Food and Beverage$1,151 · 54 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 169 internal medicine physicians in Modesto · All internal medicine physicians in California