Roy Anthony Orden, MD
NPI 1861781056ActiveIndividual· Allergy & Immunology, Allergy· Walnut Creek, CA
Allergy & Immunology, Allergy (MD) in Walnut Creek, California, trained at University of Washington School of Medicine (class of 2011). In 2024 Medicare paid $290,475 for 198 patients, and Part D covered 684 of their prescriptions, 61% of them generic. Astrazeneca Pharmaceuticals LP was the largest of 21 companies reporting payments in 2025, $2,329 in all, mostly food and beverage.
Overview
| NPI | 1861781056 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Mar 29, 2011 |
| Last updated in NPPES | Dec 2, 2024 |
| Certified by provider | Dec 2, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Allergy & Immunology, Allergy Primary | 207KA0200X | A141478 | CA |
| Allergy & Immunology | 207K00000X | A141478 | 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 - Allergy/Immunology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 198 |
|---|---|
| Services billed | 12,802 across 29 procedure codes |
| Paid by Medicare | $290,475 |
Part D prescriptions in 2024
| Prescriptions (claims) | 684 · 1,054 30-day fills |
|---|---|
| Patients | 143 |
| Total drug cost | $216,776 |
| Generic share | 61% of claims |
Education and affiliations
| Medical school | University of Washington School of Medicine |
|---|---|
| Graduation year | 2011 |
| Medicare specialty | Allergy/Immunology |
| Telehealth | Offers telehealth |
Medical group
- Allergy and Asthma Medical Group of the Bay Area IncBrentwood, CA · 20 clinicians
Hospital affiliation
- John Muir Medical Center - Walnut Creek CampusWalnut Creek, CA
Industry payments (Open Payments)
- 2025$2,329 · 122 payments from 21 companies
- 2024$3,281 · 109 payments from 22 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $447.93 | 41 |
| Genzyme Corporation | $336.56 | 12 |
| Ars Pharmaceuticals Operations, Inc. | $327.90 | 12 |
| Glaxosmithkline, LLC. | $261.24 | 13 |
| Amgen Inc. | $195.72 | 14 |
What the 2025 payments were for
- Food and Beverage$2,329 · 122 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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