Christopher Chen, MD
NPI 1356704407ActiveIndividual· Internal Medicine, Cardiovascular Disease· Concord, CA
Internal Medicine, Cardiovascular Disease (MD) in Concord, California, trained at University of Maryland School of Medicine (class of 2016). Their prescriptions cost Medicare Part D more than their services did: $1,740,603 for 7,581 claims, against $401,091 paid for services in 2024. Biotronik Inc. was the largest of 24 companies reporting payments in 2025, $5,018 in all, mostly food and beverage.
Overview
| NPI | 1356704407 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Apr 5, 2016 |
| Last updated in NPPES | Aug 3, 2022 |
| Certified by provider | Aug 3, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Cardiovascular Disease Primary | 207RC0000X | A161407 | 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 - Cardiovascular Disease (Cardiology) (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 1,652 |
|---|---|
| Services billed | 7,062 across 65 procedure codes |
| Paid by Medicare | $401,091 |
Part D prescriptions in 2024
| Prescriptions (claims) | 7,581 · 20,706 30-day fills |
|---|---|
| Patients | 917 |
| Total drug cost | $1,740,603 |
| Generic share | 84% of claims |
Education and affiliations
| Medical school | University of Maryland School of Medicine |
|---|---|
| Graduation year | 2016 |
| Medicare specialty | Cardiovascular Disease (Cardiology) |
| Telehealth | Offers telehealth |
Medical group
- John Muir Physician NetworkPleasant Hill, CA · 494 clinicians
Hospital affiliations
- Contra Costa Regional Medical CenterMartinez, CA
- John Muir Medical Center - Concord CampusConcord, CA
- John Muir Medical Center - Walnut Creek CampusWalnut Creek, CA
- Sutter Delta Medical CenterAntioch, CA
- UCSF Medical CenterSan Francisco, CA
Other facilities
- John Muir Home Health ServicesHome health agency · Concord, CA
Industry payments (Open Payments)
- 2025$5,018 · 133 payments from 24 companies
- 2024$2,180 · 74 payments from 21 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Biotronik Inc. | $2,166 | 31 |
| Novartis Pharmaceuticals Corporation | $498.71 | 25 |
| Abbott Laboratories | $323.47 | 2 |
| Boston Scientific Corporation | $246.01 | 7 |
| Amgen Inc. | $204.18 | 10 |
What the 2025 payments were for
- Food and Beverage$3,995 · 128 payments
- Travel and Lodging$1,023 · 5 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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