Gerald Frank Katz, M.D.
NPI 1306868450ActiveIndividual· Obstetrics & Gynecology· Walnut Creek, CA
Obstetrics & Gynecology (M.D.) with Bass Medical Group, practicing in Walnut Creek, California. Their prescriptions cost Medicare Part D more than their services did: $42,757 for 335 claims, against $21,305 paid for services in 2024. Biogen, Inc. was the largest of 10 companies reporting payments in 2025, $626.18 in all, mostly food and beverage. Lists John Muir Medical Center - Concord Campus and 1 other hospital as hospital affiliations.
Overview
| NPI | 1306868450 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jul 24, 2006 |
| Last updated in NPPES | Feb 11, 2025 |
| Certified by provider | Feb 11, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Obstetrics & Gynecology Primary | 207V00000X | G75401 | 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 - Obstetrics/Gynecology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 132 |
|---|---|
| Services billed | 364 across 21 procedure codes |
| Paid by Medicare | $21,305 |
Part D prescriptions in 2024
| Prescriptions (claims) | 335 · 811 30-day fills |
|---|---|
| Patients | 92 |
| Total drug cost | $42,757 |
| Generic share | 85% of claims |
Education and affiliations
| Graduation year | 1989 |
|---|---|
| Medicare specialty | Obstetrics/Gynecology |
Medical group
- Bass Medical GroupChico, CA · 291 clinicians
Hospital affiliations
- John Muir Medical Center - Concord CampusConcord, CA
- John Muir Medical Center - Walnut Creek CampusWalnut Creek, CA
Industry payments (Open Payments)
- 2025$626.18 · 39 payments from 10 companies
- 2024$400.12 · 18 payments from 9 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Biogen, Inc. | $171.18 | 7 |
| Mayne Pharma Commercial LLC | $100.11 | 15 |
| Exeltis, USA Inc. | $97.32 | 4 |
| Millicent US Inc | $49.78 | 2 |
| Organon LLC | $48.26 | 3 |
What the 2025 payments were for
- Food and Beverage$626.18 · 39 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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