ERNEST WHANWOOK CHANG M.D. PH.D.
NPI 1861927956
Internal Medicine - Cardiovascular Disease in Westwood, NJ

Q: What is Ernest Chang's NPI number?

The NPI number for Ernest Chang is 1861927956. It was assigned to this individual provider in the NPPES registry on April 26, 2017.

Q: What is Ernest Chang's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.

Q: When was this NPI record last updated?

The NPPES record for Ernest Chang was last updated on June 12, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since April 26, 2017PECOS EnrolledAccepts Medicare Assignment

84.47/100

CMS Quality Rating

333 OLD HOOK RD STE 200, WESTWOOD, NJ 07675(617) 877-8158 Get Directions Write a Review

NPPES record last updated: June 12, 2024. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jun 12, 2024, Oct 4, 2023, Apr 26, 2017 (3 updates tracked since 2017).

On this page

About Ernest Whanwook Chang M.d. Ph.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

ERNEST WHANWOOK CHANG M.D. PH.D. (NPI 1861927956) is an individual cardiovascular disease provider in Westwood, New Jersey, licensed in New York (296481) and active in the NPI registry since April 2017. He is enrolled in Medicare PECOS, is affiliated with Holy Name Medical Center, and maintains a secondary practice location in Paramus.

NPPES Registry Identity

NPI1861927956

Entity TypeIndividualMale

Primary Taxonomy207RC0000X

Provider Legal NameERNEST WHANWOOK CHANGCredential: M.D. PH.D.

Location Address333 OLD HOOK RD STE 200Westwood, NJ 07675-3200

Mailing Address166 Lynette DrFort Lee, NJ 07024-2106 · (617) 877-8158

Phone(617) 877-8158

Sole ProprietorYes

Medical School CMSColumbia University College Of Physicians And SurgeonsGraduated 2017

Enumeration DateApril 26, 2017

Last NPPES UpdateJune 12, 20243 updates tracked since enumeration

NPPES CertifiedJune 12, 2024

✔ NPI 1861927956 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Cardiovascular DiseaseAllopathic & Osteopathic Physicians

Taxonomy Code207RC0000X

License✔ Licensed in NY · 296481

Definition

An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.

333 OLD HOOK RD STE 200, Westwood, NJ 07675

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Secondary Practice Location 1

Location 11 Sears Dr Ste 202Paramus, NJ 07652-3510 · Phone (617) 877-8158

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Health.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Ernest Whanwook Chang M.d. Ph.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID9638413800

PECOS Enrollment IDI20240627001571

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show Ernest Chang reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Valley Physician Services PC

5.0 mi

Internal Medicine

15 ESSEX RD
Paramus, NJ 07652

Reassigned Medicare billing, New Jersey enrollment
833 clinicians in this Medicare group

NPI 1467815928 (201) 291-6086

New York University

1,054 mi

Cardiovascular Disease

3301 QUANTUM BLVD
Boynton Beach, FL 33426

Reassigned Medicare billing, New York enrollment
7,712 clinicians in this Medicare group

NPI 1285826438 (877) 648-2964

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 12

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Ultrasound of heart with color-depicted blood flow, rate, direction and valve function 93306

This is a heart ultrasound, also known as an echocardiogram. It uses sound waves to create pictures of your heart, showing how blood flows through it. The color depicts the blood flow's speed and direction. It also checks the heart's valves to ensure they're working properly.

179 services169 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

83 services56 patients

Ultrasound of heart blood flow, valves and chambers 93320

An ultrasound of your heart, also known as an echocardiogram, is a test that uses sound waves to create detailed images of your heart. It helps doctors check the health of your heart's chambers, valves, and blood flow.

49 services48 patients

Ultrasound of heart with probe in esophagus, with report 93312

This procedure, called a transesophageal echocardiogram, uses a small probe passed into your esophagus to capture detailed images of your heart. The report provides information about your heart's structure and function.

44 services43 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

44 services34 patients

Ultrasound of heart with color-depicted blood flow, rate and valve function 93325

An ultrasound of the heart, also known as an echocardiogram, uses sound waves to create pictures of your heart. It shows the structure, movement, and blood flow within your heart. This helps assess the heart's health and function, including the valves and rate.

42 services41 patients

3d radiographic procedure 76376

A 3D radiographic procedure is a non-invasive imaging test that helps doctors visualize the internal structures of your body in three dimensions. This advanced technology provides detailed images, aiding in accurate diagnosis and treatment planning. It involves exposure to minimal radiation.

41 services41 patients

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report 93000

An electrocardiogram (ECG) is a non-invasive test that records your heart's electrical activity. Using 12 leads attached to your body, it captures data to help identify heart conditions. A doctor interprets the results and provides a report.

35 services32 patients

Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222

Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.

29 services28 patients

Ultrasound of heart with color-depicted blood flow, rate, direction and valve function 93306

27 services27 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

22 services22 patients

Ct scan of blood vessels and grafts of heart with contrast 75574

A CT scan of the heart's blood vessels and grafts with contrast is a diagnostic test. A special dye (contrast) is injected into your veins, which helps create clear images of your heart's vessels and grafts. This helps doctors detect blockages or other abnormalities.

11 services11 patients

Hospital Affiliations CMS Care Compare 2

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Holy Name Medical Center

Acute Care Hospitals · Teaneck, NJ

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number310008

Location718 Teaneck RdTeaneck, NJ 07666 · Bergen County

Emergency services Birthing friendly

Valley Hospital

Acute Care Hospitals · Paramus, NJ

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number310012

Location4 Valley Health PlazaParamus, NJ 07652 · Bergen County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 07675 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$144.86 typical visit price

range $63.84 – $190.92

Typical copayment $36.21 (range $15.96 – $47.73)

Most-billed visit code 99204

Established Patient

$79.09 typical visit price

range $20.97 – $155.92

Typical copayment $19.77 (range $5.24 – $38.98)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

84.47/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored as part of a group practice

Quality

93.33

Promoting Interoperability

100

Improvement Activities

Cost

54.91

Other Providers at the Same Location NPPES

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. ARIEH GREENBAUM MD

Internal Medicine (Cardiovascular Disease)

333 OLD HOOK RD STE 200
WESTWOOD, NJ 07675

Bergen County (201) 664-0201

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Ernest Chang's NPI number?

The NPI number for Ernest Chang is 1861927956. It was assigned to this individual provider in the NPPES registry on April 26, 2017.

Where is Ernest Chang located?

Ernest Chang practices at 333 Old Hook Rd Ste 200, Westwood, NJ 07675. The listed phone number is (617) 877-8158.

What is Ernest Chang's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.

Is Ernest Chang enrolled in Medicare?

Yes. Ernest Chang is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Ernest Chang's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Ernest Chang reassigns Medicare benefits to 2 organizations: Valley Physician Services PC (Paramus, NJ) and New York University (Boynton Beach, FL). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Ernest Chang's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Ernest Chang accept?

Health plans from Oscar Health list Ernest Chang as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Ernest Chang affiliated with any hospitals?

According to CMS data, Ernest Chang is affiliated with Holy Name Medical Center and Valley Hospital.

When was this NPI record last updated?

The NPPES record for Ernest Chang was last updated on June 12, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.