Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Ernest Whanwook Chang, MDPHD

Individual provider Cardiovascular Disease Physician · NPI 1861927956

Ernest Whanwook Chang, MDPHD is registered under Cardiovascular Disease (Cardiology) in Westwood, New Jersey. Graduated from Columbia University College of Physicians and Surgeons in 2017, 9 years ago. Practices with Valley Physician Services PC, a 592-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in New York.

Years since qualifying
9
Trained at
Columbia University College of Physicians and Surgeons
Licensed in
NY
In the registry since
2017
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Practice location Address checks out

333 Old Hook Rd Ste 200
Westwood, NJ 07675-3200
Phone: (617) 877-8158
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1 Sears Dr Ste 202, Paramus, NJ 07652-3510 — (617) 877-8158

Specialties & licences

Cardiovascular Disease Physician (primary) Taxonomy 207RC0000X · Licence 296481 (NY)

Record details

NPI number1861927956
Entity typeIndividual (Type 1)
GenderMale
Credentials MDPHD
Sole proprietorYes
NPI enumeratedApril 26, 2017
Last updated in NPPESJune 12, 2024
Certification dateJune 12, 2024

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCARDIOVASCULAR DISEASE (CARDIOLOGY)
Medical schoolCOLUMBIA UNIVERSITY COLLEGE OF PHYSICIANS AND SURGEONS
Graduated 2017 (9 years in practice)
Group practice Valley Physician Services Pc — 592 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients353
Services billed 764 a service is one billed item, such as a visit, a test or a procedure
Average patient age80

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Travel and Lodging $1,424 5 payments · travel or lodging paid or reimbursed, such as to attend a conference
Food and Beverage $416 4 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Valley Physician Services PC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 592 clinicians in the practice; 12 are shown here.

Other providers in Westwood