Dr. Brian Chang
Internal Medicine (Internal Medicine Physician)
At a glance
- In the NPI registry since
- 2023
Licensed in California since 2025, according to the Medical Board of California. We show license dates only for the states that publish them in bulk; see which states do. For other states, check the state medical board.
The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. What an NPI is
Education and training
- 2023Registered with an NPI (national billing number; not a license date)
Medicare’s Care Compare data doesn’t list this clinician’s medical school. Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).
Specialties and state licenses
-
Internal Medicine Physician primary
CA license A202438 (first issued 2025; current) -
Cardiovascular Disease Physician
CA license A202438 (first issued 2025; current) - Student in an Organized Health Care Education/Training Program
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Medicare prescriptions
| Drug | Prescriptions |
|---|---|
| Atorvastatin Calcium Other prescribers in Boston, MA | 25 |
| Omeprazole Other prescribers in Boston, MA | 22 |
| Amlodipine Besylate Other prescribers in Boston, MA | 20 |
| Allopurinol Other prescribers in Boston, MA | 15 |
| Lisinopril Other prescribers in Boston, MA | 12 |
| Eliquis (apixaban) Other prescribers in Boston, MA | 11 |
Prescriptions filled under Medicare Part D, including refills. CMS leaves out drugs prescribed fewer than 11 times.
Payments from drug and device companies
In 2025, 1 companies reported 1 payments worth $80.00 in total to this clinician.
| Integra Lifesciences Corporation | $80.00 |
|---|
| Food and Beverage | $80.00 |
|---|
From CMS Open Payments. A payment is not evidence of wrongdoing; many are for consulting, teaching or meals. Clinicians can review and dispute their records with CMS.