WILLIAM B. CHUNG M.D.
NPI 1578579504
Internal Medicine - Cardiovascular Disease in Roslyn, NY

Q: What is William Chung's NPI number?

The NPI number for William Chung is 1578579504. It was assigned to this individual provider in the NPPES registry on July 31, 2006.

Q: What is William Chung'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 William Chung was last updated on June 10, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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 July 31, 2006PECOS EnrolledAccepts Medicare Assignment

100 PORT WASHINGTON BLVD, SUITE 105, ROSLYN, NY 11576(516) 390-9640(516) 390-9650 Get Directions Write a Review

NPPES record last updated: June 10, 2014. Verified against the NPPES registry weekly; last sync: October 18, 2026.

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About William B. Chung M.d. NPPES

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

WILLIAM B. CHUNG M.D. (NPI 1578579504) is an individual cardiovascular disease provider in Roslyn, New York, licensed in New York (257603) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS, is affiliated with St Francis Hospital - The Heart Center, and is a graduate of Albert Einstein College Of Medicine Of Yeshiva University (2004).

NPPES Registry Identity

NPI1578579504

Entity TypeIndividualMale

Primary Taxonomy207RC0000X

Provider Legal NameWILLIAM B. CHUNGCredential: M.D.

Location Address100 PORT WASHINGTON BLVD, SUITE 105Roslyn, NY 11576

Mailing Address100 Port Washington Blvd, Suite 105Roslyn, NY 11576 · (516) 390-9640 · Fax (516) 390-9650

Phone(516) 390-9640

Fax(516) 390-9650

Sole ProprietorNo

Medical School CMSAlbert Einstein College Of Medicine Of Yeshiva UniversityGraduated 2004

Enumeration DateJuly 31, 2006

Last NPPES UpdateJune 10, 2014

✔ NPI 1578579504 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 · 257603

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.

100 PORT WASHINGTON BLVD, Roslyn, NY 11576

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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

William B. Chung M.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 ID7719984293

PECOS Enrollment IDI20120725000011

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 Reassignment

Medicare enrollment records show William Chung reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Chs Physician Partners, P.C

Same address

Cardiovascular Disease

100 PORT WASHINGTON BLVD, SUITE 105
Roslyn, NY 11576

Reassigned Medicare billing, New York enrollment
Medicare enrollment name: Chs Physician Partners PC
944 clinicians in this Medicare group

NPI 1164585725 (516) 390-9640

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 22

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.

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

511 services344 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.

429 services392 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.

365 services161 patients

Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes 99231

Follow-up hospital inpatient care is a daily service where a healthcare professional checks on your health progress during your hospital stay. Each session typically lasts 15 minutes, involving updates on your condition and adjustments to your treatment plan, if necessary.

182 services101 patients

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.

175 services170 patients

Ultrasonic guidance for blood vessel access 76937

Ultrasonic guidance for blood vessel access is a medical procedure where sound waves are used to create images of your blood vessels. This helps doctors to accurately locate and access the vessels for treatments or tests, ensuring safety and precision.

171 services147 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.

127 services127 patients

Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes 99152

This procedure involves a doctor administering a medication to reduce your consciousness during a procedure. This helps in managing discomfort and anxiety. The initial application lasts for 15 minutes and is for individuals aged 5 years or older.

109 services103 patients

Replacement of aortic valve through the skin and femoral artery 33361

This procedure, known as Transcatheter Aortic Valve Replacement (TAVR), involves replacing a damaged aortic valve through a small incision in the leg. A catheter is inserted into the femoral artery and guided up to the heart. The new valve is then positioned and deployed, restoring normal blood flow.

86 services85 patients

Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223

Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.

78 services75 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.

75 services71 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.

67 services62 patients

Repair of mitral valve through the skin, initial prosthesis 33418

This procedure, known as Transcatheter Mitral Valve Repair (TMVR), involves a small tube inserted through your skin into a blood vessel. A device is then guided to your heart to repair the mitral valve, using an initial prosthesis. This is a less invasive alternative to open-heart surgery.

54 services54 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233

Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.

40 services31 patients

Placement and subsequent removal of device to protect brain from embolism through catheter using imaging guidance 33370

This procedure involves inserting a device through a catheter to shield the brain from harmful blood clots (embolism). The process is monitored using imaging technology. After serving its purpose, the device is carefully removed through the same pathway.

36 services36 patients

Physician or allowed practitioner certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians and G0180

This is a service where a doctor or authorized practitioner certifies that you require Medicare-covered home health services. They will communicate with the home health agency and review reports on your health status to ensure you receive appropriate care. This does not involve an in-person visit.

35 services35 patients

Ultrasound evaluation of heart blood vessel or graft with review by radiologist, initial vessel 92978

This procedure involves using ultrasound technology to examine the first vessel of your heart or graft. A radiologist will review the images. It's a non-invasive way to check the health of your heart's blood vessels.

29 services29 patients

Insertion of tube in left lower heart chamber and coronary artery for diagnosis with review by radiologist 93458

This procedure involves placing a tube into your left lower heart chamber and coronary artery. It helps doctors diagnose heart conditions by allowing them to view these areas in detail. A radiologist will review the images to ensure accurate diagnosis.

29 services29 patients

Insertion of stents with balloon dilation of coronary artery or branch, single artery or branch 92928

This procedure involves placing a small, mesh tube (stent) in your coronary artery to keep it open. A balloon is used to expand the stent and artery, improving blood flow to your heart. It's typically done for a single artery or branch.

28 services26 patients

Insertion of tube in right and left heart chambers and coronary artery for diagnosis with review by radiologist 93460

This procedure involves placing a tube into the heart chambers and coronary artery. It helps diagnose heart conditions. A radiologist reviews the images obtained. It's a standard, safe procedure performed by experienced medical professionals.

28 services28 patients

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

15 services15 patients

Insertion of tube in right and left heart chambers, coronary artery, and bypass graft for diagnosis with review by radiologist 93461

This procedure involves placing a tube into your heart's chambers and coronary artery to help diagnose heart conditions. A radiologist reviews images taken during the procedure to identify any issues. It's a critical step towards effective treatment.

14 services14 patients

Hospital Affiliations CMS Care Compare 2

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

St Francis Hospital - The Heart Center

Acute Care Hospitals · Roslyn, NY

5/5 CMS rating

OwnershipVoluntary non-profit - Church

CMS Certification Number330182

Location100 Port Washington BoulevardRoslyn, NY 11576 · Nassau County

Emergency services

Good Samaritan Hospital Medical Center

Acute Care Hospitals · West Islip, NY

1/5 CMS rating

OwnershipVoluntary non-profit - Church

CMS Certification Number330286

Location1000 Montauk HighwayWest Islip, NY 11795 · Suffolk County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 11576 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

$154.28 typical visit price

range $67.40 – $203.53

Typical copayment $38.57 (range $16.85 – $50.88)

Most-billed visit code 99204

Established Patient

$83.44 typical visit price

range $21.66 – $164.45

Typical copayment $20.86 (range $5.41 – $41.11)

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.

Other Providers at the Same Location NPPES 20

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

ERIN MARIE MARKEY R.N.,M.S.,APRN-BC

Nurse Practitioner (Acute Care)

100 PORT WASHINGTON BLVD
ROSLYN, NY 11576

Nassau County (516) 562-6351

DR. MENA YACOUB D.O

Internal Medicine (Clinical Cardiac Electrophysiology)

100 PORT WASHINGTON BLVD
ROSLYN, NY 11576

Nassau County (718) 689-0316

JULIA COHEN

Physician Assistant

100 PORT WASHINGTON BLVD
ROSLYN, NY 11576

Nassau County (516) 562-6000

PEDIATRIC CARDIOLOGY OF LI PC

Pediatrics (Pediatric Cardiology)

100 PORT WASHINGTON BLVD, SUITE 108
ROSLYN, NY 11576

Nassau County (516) 365-3340

PATRICK BRENNAN P.A.

Physician Assistant

100 PORT WASHINGTON BLVD
ROSLYN, NY 11576

Nassau County (516) 338-5358

KENNETH ZIELINSKI P.A.

Physician Assistant

100 PORT WASHINGTON BLVD
ROSLYN, NY 11576

Nassau County (516) 338-5358

DR. STEFAN MILTON MUEHLBAUER M.D., PHD

Emergency Medicine

100 PORT WASHINGTON BLVD, DEPT OF EMERGENCY MEDICINE
ROSLYN, NY 11576

Nassau County (165) 626-6055

MRS. MELISSA A MORELLI FNP-C

Nurse Practitioner (Family)

100 PORT WASHINGTON BLVD, ST. FRANCIS HOSPITAL EMERGENCY ROOM
ROSLYN, NY 11576

Nassau County (516) 562-6600

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 William Chung's NPI number?

The NPI number for William Chung is 1578579504. It was assigned to this individual provider in the NPPES registry on July 31, 2006.

Where is William Chung located?

William Chung practices at 100 Port Washington Blvd Suite 105, Roslyn, NY 11576. The listed phone number is (516) 390-9640.

What is William Chung's specialty?

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

Is William Chung enrolled in Medicare?

Yes. William Chung 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 organization bills Medicare for William Chung's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Chung reassigns Medicare benefits to Chs Physician Partners, P.C (Roslyn, NY). The 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 William Chung's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is William Chung affiliated with any hospitals?

According to CMS data, William Chung is affiliated with St Francis Hospital - The Heart Center and Good Samaritan Hospital Medical Center.

When was this NPI record last updated?

The NPPES record for William Chung was last updated on June 10, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.