Gary Toshiyuki Tanouye, M.D.
NPI 1326043738ActiveIndividual· Internal Medicine· Tarzana, CA
Internal Medicine (M.D.) in Tarzana, California, trained at University of Southern California Keck School of Medicine (class of 1982). Their prescriptions cost Medicare Part D more than their services did: $561,730 for 5,204 claims, against $189,572 paid for services in 2024.
Overview
| NPI | 1326043738 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 14, 2005 |
| Last updated in NPPES | Nov 17, 2009 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | G50249 | 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 | 492 |
|---|---|
| Services billed | 6,017 across 55 procedure codes |
| Paid by Medicare | $189,572 |
Part D prescriptions in 2024
| Prescriptions (claims) | 5,204 · 12,763 30-day fills |
|---|---|
| Patients | 559 |
| Total drug cost | $561,730 |
| Generic share | 87% of claims |
Education and affiliations
| Medical school | University of Southern California Keck School of Medicine |
|---|---|
| Graduation year | 1982 |
| Medicare specialty | Internal Medicine |
Medical group
- Cedars-Sinai Medical Care FoundationWest Hollywood, CA · 1,692 clinicians
Hospital affiliation
- Cedars-Sinai Medical CenterLos Angeles, CA
Other facilities
- Assisted Home CareHome health agency · Mission Hills, CA
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 76 internal medicine physicians in Tarzana · All internal medicine physicians in California