Ernest Bloom, MD
NPI 1306941620ActiveIndividual· Dermatology, Dermatopathology· Alameda, CA
Dermatology, Dermatopathology (MD) in Alameda, California, trained at University of California, Davis School of Medicine (class of 1984). 440 Medicare patients in 2024, $213,790 paid; nearly all of their 1,353 Part D prescriptions were generic (95%). Leo Pharma Inc. was the largest of 4 companies reporting payments in 2025, $1,282 in all, mostly food and beverage.
Overview
| NPI | 1306941620 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Sep 13, 2006 |
| Last updated in NPPES | Jan 31, 2013 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Dermatology, Dermatopathology Primary | 207ND0900X | G56359 | CA |
| Dermatology | 207N00000X | G56359 | CA |
| Dermatology, MOHS-Micrographic Surgery | 207ND0101X | G56359 | CA |
| Dermatology, Clinical & Laboratory Dermatological Immunology | 207NI0002X | G56359 | CA |
| Dermatology, Pediatric Dermatology | 207NP0225X | G56359 | CA |
| Dermatology, Procedural Dermatology | 207NS0135X | G56359 | 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 - Dermatology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 440 |
|---|---|
| Services billed | 10,768 across 25 procedure codes |
| Paid by Medicare | $213,790 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,353 · 1,557 30-day fills |
|---|---|
| Patients | 275 |
| Total drug cost | $204,440 |
| Generic share | 95% of claims |
Education and affiliations
| Medical school | University of California, Davis School of Medicine |
|---|---|
| Graduation year | 1984 |
| Medicare specialty | Dermatology |
Medical group
- Csi Medical GroupFullerton, CA · 111 clinicians
Industry payments (Open Payments)
- 2025$1,282 · 64 payments from 4 companies
- 2024$957.99 · 56 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Leo Pharma Inc. | $1,139 | 58 |
| Pfizer Inc. | $62.85 | 3 |
| Organon LLC | $47.70 | 2 |
| Abbvie Inc. | $32.67 | 1 |
What the 2025 payments were for
- Food and Beverage$1,282 · 64 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records