Zuzana U. Foster, M.D.
NPI 1184621542ActiveIndividual· Internal Medicine, Rheumatology· Walnut Creek, CA
Internal Medicine, Rheumatology (M.D.) with Arthritis and Rheumatology Medical Associates Inc, practicing in Walnut Creek, California. Their prescriptions cost Medicare Part D more than their services did: $1,170,744 for 3,659 claims, against $639,700 paid for services in 2024. Amgen Inc. was the largest of 17 companies reporting payments in 2025, $1,869 in all, mostly food and beverage. Lists John Muir Medical Center - Concord Campus and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1184621542 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 30, 2005 |
| Last updated in NPPES | Dec 27, 2021 |
| Certified by provider | Dec 27, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Rheumatology Primary | 207RR0500X | A65926 | 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 - Rheumatology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 511 |
|---|---|
| Services billed | 31,150 across 25 procedure codes |
| Paid by Medicare | $639,700 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,659 · 7,112 30-day fills |
|---|---|
| Patients | 490 |
| Total drug cost | $1,170,744 |
| Generic share | 94% of claims |
Education and affiliations
| Graduation year | 1995 |
|---|---|
| Medicare specialty | Rheumatology |
| Telehealth | Offers telehealth |
Medical group
- Arthritis and Rheumatology Medical Associates IncWalnut Creek, CA · 6 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 CareStanford, CA
- Stanford Health Care Tri-ValleyPleasanton, CA
Industry payments (Open Payments)
- 2025$1,869 · 83 payments from 17 companies
- 2024$1,750 · 76 payments from 20 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $469.03 | 33 |
| Ucb, Inc. | $320.20 | 9 |
| Abbvie Inc. | $185.65 | 6 |
| Mallinckrodt Hospital Products Inc. | $119.73 | 5 |
| Fresenius Kabi USA, LLC | $101.29 | 3 |
What the 2025 payments were for
- Food and Beverage$1,869 · 83 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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