Walter W. Chien, MD
NPI 1386615631ActiveIndividual· Internal Medicine, Clinical Cardiac Electrophysiology· Stockton, CA
Internal Medicine, Clinical Cardiac Electrophysiology (MD) in Stockton, California, trained at Washington University School of Medicine (class of 1984). Part D covered 29 prescriptions written in 2024, 86% of them generic. Impulse Dynamics (USA) Inc. was the largest of 2 companies reporting payments in 2025, $2,932 in all, mostly consulting fees.
Overview
| NPI | 1386615631 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jan 26, 2006 |
| Last updated in NPPES | Nov 4, 2022 |
| Certified by provider | Nov 4, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Clinical Cardiac Electrophysiology Primary | 207RC0001X | G56242 | CA |
| Internal Medicine, Cardiovascular Disease | 207RC0000X | G56242 | 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 - Cardiac Electrophysiology (CA) |
|---|
Part D prescriptions in 2024
| Prescriptions (claims) | 29 · 59 30-day fills |
|---|---|
| Patients | 16 |
| Total drug cost | $7,774 |
| Generic share | 86% of claims |
Education and affiliations
| Medical school | Washington University School of Medicine |
|---|---|
| Graduation year | 1984 |
| Medicare specialty | Cardiac Electrophysiology |
| Secondary specialties | Cardiovascular Disease (Cardiology) |
Medical group
- County of San JoaquinFrench Camp, CA · 199 clinicians
Hospital affiliation
- San Joaquin General HospitalFrench Camp, CA
Industry payments (Open Payments)
- 2025$2,932 · 3 payments from 2 companies
- 2024$93.50 · 3 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Impulse Dynamics (USA) Inc. | $2,909 | 2 |
| Medtronic, Inc. | $23.26 | 1 |
What the 2025 payments were for
- Consulting Fee$2,834 · 1 payment
- Food and Beverage$98.26 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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