Ernest Whanwook Chang, M.D. PH.D.
Cardiovascular Disease Physician · Westwood, NJ
Ernest Whanwook Chang, M.D. PH.D. is a cardiovascular disease physician with a practice address in Westwood, New Jersey, and NPI 1861927956, issued on Apr 26, 2017. Check the license on the New Jersey State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Ernest Whanwook Chang
- Credential
- M.D. PH.D.
- Primary taxonomy
- Cardiovascular Disease Physician 207RC0000X
- License number
- 296481 NY
Self-reported in NPPES; status is on the state search - Practice location
- 333 Old Hook RD Ste 200, Westwood, NJ 07675
- Phone
- (617) 877-8158
- Enumerated
- Apr 26, 2017
- Record last updated
- Jun 12, 2024
- Medicare enrollment
- Enrolled (PECOS I20240627001571); accepts Medicare assignment
- Medical or professional school
- Columbia University College Of Physicians And Surgeons, 2017
- Entity
- Type 1 · individual
8 nearest cardiovascular disease physician records → All 1,102 in New Jersey → Look up another NPI →
Also registered at 333 Old Hook RD Ste 200
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Arieh Greenbaum, MDCardiovascular Disease Physician1972921856
Verify Ernest Whanwook Chang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNew Jersey State Board of Medical ExaminersCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% fewer Medicare Part D claims than the average cardiovascular disease physician in 2024
313 Medicare Part D claims for 76 beneficiaries, against an average of 3,078 among the 20,728 providers of this specialty who prescribed in Part D. Brand-name drugs were 21% of claims.
Most prescribed
- Metoprolol Succinate51 claims
- Amlodipine Besylate35 claims
- Eliquis32 claims
- Atorvastatin Calcium29 claims
- Jardiance21 claims
- Furosemide15 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 84.5 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $25.71
1 payment: food and beverage; the largest payer was Boston Scientific Corporation. The 16,686 providers of this specialty with any payment received $3,819.56 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Valley Physician Services PCHoboken, NJ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ernest Whanwook Chang among 1,102 cardiovascular disease physician records in New Jersey
Ernest Whanwook Chang, M.D. PH.D. is one of 1,102 cardiovascular disease physician records with a practice address in New Jersey. 87% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 92% of them.
- NPI issued2017 · 92% of these records are older, 6% newer
- In a Medicare fileYes · 87% of these records are
- In the CMS Doctors and Clinicians fileYes · 76% of these records are
- Graduated2017 · median 1997 among the 833 with a school on file
- Record last updated2024 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0000X and a New Jersey practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
11 cardiovascular disease physician records list a practice address in Westwood
They are 11 of the 382 NPPES records with a practice address in Westwood, and 1,102 cardiovascular disease physician records in New Jersey.
All 1,102 in New Jersey → Every provider in Westwood → Cardiovascular Disease Physician nationwide →
The 8 cardiovascular disease physician records with the nearest ZIP codes
- Michael AnshelevichWestwood, NJ 076751851396444
- Stuart BarrWestwood, NJ 076751992700579
- Thomas CockeWestwood, NJ 076751972508554
- Sheldon EisenbergWestwood, NJ 076751144225723
- Arieh Greenbaum, MDWestwood, NJ 076751972921856
- Joel LandzbergWestwood, NJ 076751730184318
- Elliott LichtsteinWestwood, NJ 076751760487342
- Leonard Lyon, PAWestwood, NJ 076751780602052
Common questions
What is Ernest Whanwook Chang, M.D. PH.D.'s NPI number?
Ernest Whanwook Chang, M.D. PH.D.'s National Provider Identifier (NPI) is 1861927956, issued on Apr 26, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Ernest Whanwook Chang, M.D. PH.D. located?
The NPPES record lists a practice address at 333 Old Hook RD Ste 200, Westwood, NJ, 07675. Phone: (617) 877-8158. Providers update this record themselves, so call before visiting.
How can I verify Ernest Whanwook Chang, M.D. PH.D.'s license?
Search the New Jersey State Board of Medical Examiners at https://newjersey.mylicense.com/verification/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Ernest Whanwook Chang, M.D. PH.D. prescribe under Medicare Part D?
In 2024, Ernest Whanwook Chang, M.D. PH.D. had 313 Medicare Part D claims for 76 beneficiaries; the average among cardiovascular disease physician prescribers was 3,078. Part D covers Medicare prescriptions only.
What is Ernest Whanwook Chang, M.D. PH.D.'s MIPS final score?
The 2023 MIPS final score is 84.5 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.