Marion S. Johnson, MD
NPI 1952523086ActiveIndividual· Allergy & Immunology, Allergy· Los Angeles, CA
Allergy & Immunology, Allergy (MD) in Los Angeles, California, trained at University of California, San Francisco School of Medicine (class of 1978). Part D covered 242 prescriptions written in 2024, 67% of them generic. Genzyme Corporation was the largest of 10 companies reporting payments in 2025, $733.52 in all, mostly food and beverage.
Overview
| NPI | 1952523086 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | May 2, 2007 |
| Last updated in NPPES | Jul 30, 2025 |
| Certified by provider | Jul 30, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Allergy & Immunology, Allergy Primary | 207KA0200X | G40087 | CA |
| Specialist | 174400000X | — | — |
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 - Allergy/Immunology (CA) |
|---|
Part D prescriptions in 2024
| Prescriptions (claims) | 242 · 358 30-day fills |
|---|---|
| Patients | 71 |
| Total drug cost | $120,841 |
| Generic share | 67% of claims |
Education and affiliations
| Medical school | University of California, San Francisco School of Medicine |
|---|---|
| Graduation year | 1978 |
| Medicare specialty | Allergy/Immunology |
| Secondary specialties | General Practice |
| Telehealth | Offers telehealth |
Industry payments (Open Payments)
- 2025$733.52 · 26 payments from 10 companies
- 2024$615.30 · 17 payments from 7 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Genzyme Corporation | $208.12 | 7 |
| Novartis Pharmaceuticals Corporation | $131.42 | 5 |
| Ars Pharmaceuticals Operations, Inc. | $105.78 | 4 |
| Grifols USA, LLC | $67.41 | 2 |
| Cycle Pharmaceuticals Inc | $62.87 | 2 |
What the 2025 payments were for
- Food and Beverage$733.52 · 26 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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