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SING CHAN M.D.
NPI 1225053523
Internal Medicine - Gastroenterology in Flushing, NY

Active since July 13, 2006PECOS EnrolledAccepts Medicare Assignment
3808 UNION ST, STE 3N, FLUSHING, NY 11354(516) 238-6855(646) 224-8549 Get Directions Write a Review

NPPES record last updated: September 18, 2018. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Sing Chan M.d. NPPES

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

SING CHAN M.D. (NPI 1225053523) is an individual gastroenterology provider in Flushing, New York, licensed in New York (192380) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS and is a graduate of State University Of New York Downstate Medical Center (1991).

NPPES Registry Identity

NPI1225053523
Entity TypeIndividualMale
Primary Taxonomy207RG0100X
Provider Legal NameSING CHANCredential: M.D.
Location Address3808 UNION ST, STE 3NFlushing, NY 11354-5670
Mailing Address3808 Union St, Ste 3nFlushing, NY 11354-5670 · (718) 886-6292 · Fax (646) 224-8549
Phone(516) 238-6855
Fax(646) 224-8549
Sole ProprietorYes
Medical School CMSState University Of New York Downstate Medical CenterGraduated 1991
Enumeration DateJuly 13, 2006
Last NPPES UpdateSeptember 18, 2018
✔ NPI 1225053523 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 · 192380
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.
3808 UNION ST, Flushing, NY 11354
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Other Identifiers 1

Medicaid01877912NY

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

Sing Chan 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 ID3678561511
PECOS Enrollment IDI20040430001347
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 Sing Chan reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Dreamwork Medical, PLLC
0.2 mi
Clinical Medical Laboratory
14241 41ST AVE STE P10
Flushing, NY 11355
  • Reassigned Medicare billing, New York enrollment
  • 2 clinicians in this Medicare group
NPI 1013169283 (718) 886-6292

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 16

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.

Injection, adrenalin, epinephrine, 0.1 mg J0171
This is an injection of a medication called epinephrine, also known as adrenaline. It's often used in emergencies to treat severe allergic reactions. It works by relaxing muscles in the airways and tightening blood vessels, which can help restore normal breathing.
229 services57 patients
Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more 99212
This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.
196 services148 patients
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43239
This procedure involves using a thin, flexible tube with a light and camera, known as an endoscope, to examine the esophagus, stomach, and upper part of the small intestine. Small tissue samples are taken for further examination to help diagnose various conditions.
143 services139 patients
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.
115 services88 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.
115 services94 patients
New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203
This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.
57 services57 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 11354 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
$153.13 typical visit price
range $67.00 – $201.98
Typical copayment $38.28 (range $16.75 – $50.49)
Most-billed visit code 99204
Established Patient
$116.96 typical visit price
range $21.62 – $163.52
Typical copayment $29.24 (range $5.40 – $40.88)
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.

Reported Quality Measures

Colorectal Cancer Screening
Percentage of adults 50-75 years of age who had appropriate screening for colorectal cancer
97%892 patients4/55-star benchmark: 99%
Documentation of Current Medications in the Medical Record
Percentage of visits for patients aged 18 years and older for which the eligible professional or eligible clinician attests to documenting a list of current medications using all immediate resources available on the date of the encounter.
100%3,683 patients5/55-star benchmark: 100%
Medication Reconciliation
The MIPS eligible clinician performs medication reconciliation for at least one transition of care in which the patient is transitioned into the care of the MIPS eligible clinician.
30%2,133 patients2/55-star benchmark: 100%
Patient-Specific Education
The MIPS eligible clinician must use clinically relevant information from CEHRT to identify patient-specific educational resources and provide access to those materials to at least one unique patient seen by the MIPS eligible clinician.
40%5,221 patients2/55-star benchmark: 100%
Preventive Care and Screening: Body Mass Index (BMI) Screening and Follow-Up Plan
Percentage of patients aged 18 years and older with a BMI documented during the current encounter or during the previous twelve months AND with a BMI outside of normal parameters, a follow-up plan is documented during the encounter or during the previous…
100%2,032 patients5/55-star benchmark: 100%
Preventive Care and Screening: Tobacco Use: Screening and Cessation Intervention
Percentage of patients aged 18 years and older who were screened for tobacco use one or more times within 24 months AND who received tobacco cessation intervention if identified as a tobacco user
100%135 patients5/55-star benchmark: 100%
Provide Patient Access
At least one patient seen by the MIPS eligible clinician during the performance period is provided timely access to view online, download, and transmit to a third party their health information subject to the MIPS eligible clinician's discretion to withhold…
25%5,221 patients2/55-star benchmark: 100%
Secure Messaging
For at least one unique patient seen by the MIPS eligible clinician during the performance period, a secure message was sent using the electronic messaging function of CEHRT to the patient (or the patient-authorized representative), or in response to a secure…
0%5,221 patients1/55-star benchmark: 79%
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 3

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

JULIE ZANG M.D., PH.D.
Dermatology
3808 UNION ST, STE 3F
FLUSHING, NY 11354
Queens County (646) 872-7148
LYRO INC
Non-emergency Medical Transport (VAN)
3808 UNION ST, 11A 13
FLUSHING, NY 11354
Queens County (929) 476-6083
NING DING
Social Worker
3808 UNION ST
FLUSHING, NY 11354
Queens County (551) 229-8854

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 Sing Chan's NPI number?

The NPI number for Sing Chan is 1225053523. It was assigned to this individual provider in the NPPES registry on July 13, 2006.

Where is Sing Chan located?

Sing Chan practices at 3808 Union St Ste 3N, Flushing, NY 11354. The listed phone number is (516) 238-6855.

What is Sing Chan's specialty?

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

Is Sing Chan enrolled in Medicare?

Yes. Sing Chan 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 Sing Chan's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Sing Chan reassigns Medicare benefits to Dreamwork Medical, PLLC (Flushing, 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 Sing Chan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Sing Chan was last updated on September 18, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.