DR. PETER YOUK-TWOO CHANG MD
NPI 1366426264
Internal Medicine - Gastroenterology in Nanuet, NY

Active since December 05, 2005PECOS EnrolledAccepts Medicare AssignmentCLIA 33D0996147 · Waiver
100/100
CMS Quality Rating
55 OLD TURNPIKE RD, SUITE 605, NANUET, NY 10954(845) 623-8400(845) 623-2451 Get Directions Write a Review

NPPES record last updated: December 20, 2013. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Dr. Peter Youk-twoo Chang Md NPPES

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

DR. PETER YOUK-TWOO CHANG MD (NPI 1366426264) is an individual gastroenterology provider in Nanuet, New York, licensed in New York (171437) and active in the NPI registry since December 2005. He is enrolled in Medicare PECOS, holds a CLIA Waiver certificate valid through February 10, 2028, and is affiliated with Nyack Hospital.

NPPES Registry Identity

NPI1366426264
Entity TypeIndividualMale
Primary Taxonomy207RG0100X
Provider Legal NameDR. PETER YOUK-TWOO CHANGCredential: MD
Location Address55 OLD TURNPIKE RD, SUITE 605Nanuet, NY 10954-2461
Mailing Address10 Fieldcrest DrNew City, NY 10956-5439 · (845) 623-8400 · Fax (845) 623-2451
Fax(845) 623-2451
Sole ProprietorYes
Medical School CMSNew York Medical CollegeGraduated 1986
Enumeration DateDecember 5, 2005
Last NPPES UpdateDecember 20, 2013
NPI 1366426264 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
License Licensed in NY · 171437
Definition
An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.
55 OLD TURNPIKE RD, Nanuet, NY 10954

Other Identifiers 3

Medicare UPINF22811NY
Medicare ID-Type Unspecified47K451NY
Medicaid01632535NY

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

Enrolled in Medicare and accepts Medicare assignment

Dr. Peter Youk-twoo Chang Md 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 ID1759354509
PECOS Enrollment IDI20040818001220
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.

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Waiver 33D0996147

Peter Y Chang MD PLLC · Nanuet, NY
Active · expires Feb 10, 2028
CLIA Number33D0996147
Laboratory TypePhysician Office
Certificate Effective DateFebruary 11, 2026
Certificate Expiration DateFebruary 10, 2028
Laboratory DirectorPeter Y. Chang MD
Laboratory Phone(845) 623-8400
Laboratory LocationPeter Y Chang MD PLLC55 Old Turnpike Road, Suite 605, Nanuet, NY 10954
CLIA data matches this NPI record on: Address Phone
This certificate is issued to a laboratory to perform only waived tests.

Areas of Expertise CMS Part B claims 18

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.
494 services228 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.
320 services254 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.
129 services68 patients
Telephone medical discussion with physician, 21-30 minutes 99443
This service involves a 21-30 minute phone conversation with a physician. It's a chance for you to discuss your health concerns, symptoms or treatment plans. It's similar to an in-person consultation, but conducted over the phone for your convenience and safety.
111 services75 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.
77 services77 patients
Administration of influenza virus vaccine G0008
The administration of the influenza virus vaccine, also known as the flu shot, is a simple procedure to protect against the flu. A healthcare provider injects a small dose of the vaccine into your arm. This stimulates your immune system to produce antibodies, which will help your body fight off the flu if exposed.
75 services75 patients

Hospital Affiliations CMS Care Compare 2

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

Nyack Hospital

Acute Care Hospitals · Nyack, NY
2/5 CMS rating
OwnershipVoluntary non-profit - Other
CMS Certification Number330104
Location160 North Midland AvenueNyack, NY 10960 · Rockland County
Birthing friendly

Good Samaritan Hospital Of Suffern

Acute Care Hospitals · Suffern, NY
3/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number330158
Location255 Lafayette AvenueSuffern, NY 10901 · Rockland County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 10954 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
$117.62 typical visit price
range $21.66 – $164.45
Typical copayment $29.40 (range $5.41 – $41.11)
Most-billed visit code 99214
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.

100/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Individually scored
Quality99.88
Improvement Activities40

Reported Quality Measures

Age Appropriate Screening Colonoscopy
Lower rates are better for this measure.
5%427 patients
Appropriate Follow-Up Interval for Normal Colonoscopy in Average Risk Patients
100%193 patients
Colorectal Cancer Screening
99%938 patients4/55-star benchmark: 100%
Controlling High Blood Pressure
98%159 patients5/55-star benchmark: 98%
Documentation of Current Medications in the Medical Record
100%2,325 patients5/55-star benchmark: 100%
Preventive Care and Screening: Body Mass Index (BMI) Screening and Follow-Up Plan
100%1,375 patients5/55-star benchmark: 100%
Urinary Incontinence: Assessment of Presence or Absence of Urinary Incontinence in Women Aged 65 Years and Older
100%347 patients5/55-star benchmark: 100%
Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

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.

Chiropractor
55 OLD TURNPIKE RD, STE 601
NANUET, NY 10954
Licensed Practical Nurse
55 OLD TURNPIKE RD
NANUET, NY 10954
Licensed Practical Nurse
55 OLD TURNPIKE RD
NANUET, NY 10954
Licensed Practical Nurse
55 OLD TURNPIKE RD
NANUET, NY 10954
Licensed Practical Nurse
55 OLD TURNPIKE RD
NANUET, NY 10954
Internal Medicine
55 OLD TURNPIKE RD, SUITE 607
NANUET, NY 10954
Licensed Practical Nurse
55 OLD TURNPIKE RD
NANUET, NY 10954
Licensed Practical Nurse
55 OLD TURNPIKE RD
NANUET, NY 10954

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 Peter Chang's NPI number?

The NPI number for Peter Chang is 1366426264. It was assigned to this individual provider in the NPPES registry on December 5, 2005.

Where is Peter Chang located?

Peter Chang practices at 55 Old Turnpike Rd Suite 605, Nanuet, NY 10954. The listed phone number is (845) 623-8400.

What is Peter Chang's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is Peter Chang enrolled in Medicare?

Yes. Peter 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.

Does Peter Chang hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 33D0996147) is associated with this NPI, valid through February 10, 2028. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

Is Peter Chang affiliated with any hospitals?

According to CMS data, Peter Chang is affiliated with Nyack Hospital and Good Samaritan Hospital Of Suffern.

When was this NPI record last updated?

The NPPES record for Peter Chang was last updated on December 20, 2013. 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.