Janine E. Senior, MD
NPI 1154321503ActiveIndividual· Obstetrics & Gynecology· Walnut Creek, CA
Obstetrics & Gynecology (MD) in Walnut Creek, California, trained at University of Cincinnati College of Medicine (class of 1988). Their prescriptions cost Medicare Part D more than their services did: $53,919 for 450 claims, against $24,933 paid for services in 2024. Astellas Pharma US Inc was the largest of 11 companies reporting payments in 2025, $783.40 in all, mostly food and beverage.
Overview
| NPI | 1154321503 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jul 28, 2005 |
| Last updated in NPPES | Feb 27, 2025 |
| Certified by provider | Feb 27, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Obstetrics & Gynecology Primary | 207V00000X | G74576 | CA |
| Specialist | 174400000X | G74576 | 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 | 208 |
|---|---|
| Services billed | 467 across 20 procedure codes |
| Paid by Medicare | $24,933 |
Part D prescriptions in 2024
| Prescriptions (claims) | 450 · 1,043 30-day fills |
|---|---|
| Patients | 151 |
| Total drug cost | $53,919 |
| Generic share | 79% of claims |
Education and affiliations
| Medical school | University of Cincinnati College of Medicine |
|---|---|
| Graduation year | 1988 |
| 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$783.40 · 40 payments from 11 companies
- 2024$462.94 · 18 payments from 9 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astellas Pharma US Inc | $212.75 | 7 |
| Biogen, Inc. | $130.37 | 5 |
| Mayne Pharma Commercial LLC | $111.11 | 14 |
| Hologic Sales and Service, LLC | $104.17 | 3 |
| Exact Sciences Corporation | $69.76 | 3 |
What the 2025 payments were for
- Food and Beverage$783.40 · 40 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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