Samuel Osamu Mayeda, MD
NPI 1487716544ActiveIndividual· Specialist· Orange, CA
Specialist (MD) in Orange, California, licensed in CA, with an NPI issued in December 2006. Their prescriptions cost Medicare Part D more than their services did: $4,511,090 for 4,857 claims, against $115,142 paid for services in 2024. Novartis Pharmaceuticals Corporation was the largest of 18 companies reporting payments in 2025, $550.65 in all, mostly food and beverage.
Overview
| NPI | 1487716544 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Dec 15, 2006 |
| Last updated in NPPES | Jul 8, 2007 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Specialist Primary | 174400000X | C36879 | 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 - Endocrinology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 185 |
|---|---|
| Services billed | 2,400 across 21 procedure codes |
| Paid by Medicare | $115,142 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,857 · 11,739 30-day fills |
|---|---|
| Patients | 216 |
| Total drug cost | $4,511,090 |
| Generic share | 72% of claims |
Industry payments (Open Payments)
- 2025$550.65 · 23 payments from 18 companies
- 2024$964.61 · 53 payments from 18 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novartis Pharmaceuticals Corporation | $80.86 | 3 |
| Insulet Corporation | $43.74 | 1 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $40.49 | 2 |
| Amgen Inc. | $34.18 | 2 |
| Ibsa Pharma Inc. | $33.57 | 2 |
What the 2025 payments were for
- Food and Beverage$550.65 · 23 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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