Maggie Chen, MD
NPI 1649470683ActiveIndividual· Internal Medicine, Nephrology· San Jose, CA
Internal Medicine, Nephrology (MD) in San Jose, California, licensed in CA, with an NPI issued in July 2007. Their prescriptions cost Medicare Part D more than their services did: $1,127,947 for 4,091 claims, against $111,643 paid for services in 2024. Ardelyx, Inc. was the largest of 9 companies reporting payments in 2025, $877.90 in all, mostly food and beverage. Lists Good Samaritan Hospital and 1 other hospital as hospital affiliations.
Overview
| NPI | 1649470683 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jul 18, 2007 |
| Last updated in NPPES | Jun 20, 2014 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | A113157 | 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 - Nephrology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 236 |
|---|---|
| Services billed | 882 across 16 procedure codes |
| Paid by Medicare | $111,643 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,091 · 9,747 30-day fills |
|---|---|
| Patients | 395 |
| Total drug cost | $1,127,947 |
| Generic share | 73% of claims |
Education and affiliations
| Graduation year | 2008 |
|---|---|
| Medicare specialty | Nephrology |
| Secondary specialties | Internal Medicine |
Hospital affiliations
- Good Samaritan HospitalSan Jose, CA
- Santa Clara Valley Medical CenterSan Jose, CA
Other facilities
- Davita Silicon Valley DialysisDialysis facility · San Jose, CA
- Davita Tully DialysisDialysis facility · San Jose, CA
- Shc East San JoseDialysis facility · San Jose, CA
- Shc San Jose LLCDialysis facility · San Jose, CA
- Shc White RoadDialysis facility · San Jose, CA
Industry payments (Open Payments)
- 2025$877.90 · 32 payments from 9 companies
- 2024$1,061 · 46 payments from 15 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Ardelyx, Inc. | $245.44 | 10 |
| Mallinckrodt Hospital Products Inc. | $176.55 | 6 |
| Calliditas Therapeutics US Inc. | $151.52 | 6 |
| Akebia Therapeutics Inc | $124.67 | 1 |
| Astrazeneca Pharmaceuticals LP | $85.40 | 4 |
What the 2025 payments were for
- Food and Beverage$877.90 · 32 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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