Diana Superfin, M.D.
NPI 1750365953ActiveIndividual· Internal Medicine, Hematology & Oncology· Walnut Creek, CA
Internal Medicine, Hematology & Oncology (M.D.) in Walnut Creek, California, trained at Wake Forest University School of Medicine (class of 2002). In 2024 Medicare paid $2,706,211 for 473 patients, and Part D covered 1,052 of their prescriptions, 56% of them generic. Avyxa Pharma, LLC was the largest of 55 companies reporting payments in 2025, $9,827 in all, mostly food and beverage.
Overview
| NPI | 1750365953 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Dec 1, 2005 |
| Last updated in NPPES | Sep 23, 2009 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | A84532 | 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 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Hematology/Oncology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 473 |
|---|---|
| Services billed | 224,662 across 128 procedure codes |
| Paid by Medicare | $2,706,211 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,052 · 1,541 30-day fills |
|---|---|
| Patients | 156 |
| Total drug cost | $2,483,708 |
| Generic share | 56% of claims |
Education and affiliations
| Medical school | Wake Forest University School of Medicine |
|---|---|
| Graduation year | 2002 |
| Medicare specialty | Hematology/Oncology |
Medical group
- Michael P Sherman MD PHD A Medical CorporationWalnut Creek, CA · 14 clinicians
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
- National Hospice and Palliative CareHospice · Manteca, CA
Industry payments (Open Payments)
- 2025$9,827 · 243 payments from 55 companies
- 2024$10,471 · 242 payments from 48 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Avyxa Pharma, LLC | $3,678 | 5 |
| Glaxosmithkline, LLC. | $1,363 | 15 |
| Astrazeneca Pharmaceuticals LP | $443.55 | 28 |
| Janssen Biotech, Inc. | $374.56 | 16 |
| Pfizer Inc. | $345.41 | 18 |
What the 2025 payments were for
- Food and Beverage$5,249 · 239 payments
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$2,000 · 1 payment
- Travel and Lodging$1,490 · 2 payments
- Consulting Fee$1,088 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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