Neil R. Okamura, D.O.
NPI 1437261781ActiveIndividual· Internal Medicine· Danville, CA
Internal Medicine (D.O.) in Danville, California, trained at Michigan State University College of Osteopathic Medicine (class of 1988). Their prescriptions cost Medicare Part D more than their services did: $448,444 for 2,962 claims, against $130,855 paid for services in 2024. Antares Pharma, Inc. was the largest of 14 companies reporting payments in 2025, $910.99 in all, mostly food and beverage.
Overview
| NPI | 1437261781 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | D.O. |
| Sole proprietor | Yes |
| NPI issued | Aug 31, 2006 |
| Last updated in NPPES | Jan 30, 2020 |
| Certified by provider | Jan 30, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 20A6158 | 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 | 185 |
|---|---|
| Services billed | 1,499 across 65 procedure codes |
| Paid by Medicare | $130,855 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,962 · 6,316 30-day fills |
|---|---|
| Patients | 196 |
| Total drug cost | $448,444 |
| Generic share | 80% of claims |
Education and affiliations
| Medical school | Michigan State University College of Osteopathic Medicine |
|---|---|
| Graduation year | 1988 |
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Hospital affiliations
- John Muir Medical Center - Concord CampusConcord, CA
- John Muir Medical Center - Walnut Creek CampusWalnut Creek, CA
- San Ramon Regional Medical CenterSan Ramon, CA
- Stanford Health Care Tri-ValleyPleasanton, CA
Other facilities
- St. Jude Home Health AgencyHome health agency · Pleasanton, CA
- Danville Post-Acute RehabNursing home · Danville, CA
Industry payments (Open Payments)
- 2025$910.99 · 38 payments from 14 companies
- 2024$634.34 · 20 payments from 12 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Antares Pharma, Inc. | $153.84 | 8 |
| Philips North America LLC | $139.95 | 12 |
| Astrazeneca Pharmaceuticals LP | $106.44 | 1 |
| Eisai Inc. | $100.92 | 1 |
| Esperion Therapeutics, Inc. | $71.90 | 3 |
What the 2025 payments were for
- Food and Beverage$910.99 · 38 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 32 internal medicine physicians in Danville · All internal medicine physicians in California