Physician Profile
Unclaimed ProfileAbout CHAN
Sing Chan, M.D. practises gastroenterology in Flushing, NY. Sing is a 1991 graduate of State University of New York Downstate Medical Center.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Common questions
What does Dr. Chan specialise in?
Dr. Chan is a gastroenterology in Flushing, NY. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “GASTROENTEROLOGY”.
NPI registry
Where is Dr. Chan located?
Dr. Chan is listed at 3808 UNION ST STE 3N, Flushing, NY 11354. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Chan's phone number?
The number on file is (516) 238-6855. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Chan?
Dr. Chan's National Provider Identifier is 1225053523. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Chan go to medical school?
Dr. Chan attended State University of New York Downstate Medical Center, graduating in 1991. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Chan have?
Dr. Chan has 35 years experience. Calculated from a graduation year of 1991, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Chan do most often?
According to Medicare billing data, Dr. Chan performs procedures including biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope, insertion of needle into vein for collection of blood sample and removal of polyps or growths of large bowel using an endoscope with mechanical snare; provides treatments such as measurement of liver stiffness and study of rectum sensitivity and function, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Chan's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Chan. If this is you, claiming it is free.
Guide.md
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (516) 238-6855
- Email not available
Practice Locations
3808 UNION ST STE 3N
Flushing, NY 11354
Procedures Most Often Billed to Medicare
1,134 services · 841 patients · 17 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Procedure | 43239 |
143 |
| Insertion of needle into vein for collection of blood sample | Procedure | 36415 |
44 |
| Removal of polyps or growths of large bowel using an endoscope with mechanical snare | Procedure | 45385 |
43 |
| Removal of multiple external hemorrhoids | Procedure | 46250 |
32 |
| Banding of hemorrhoids using a flexible endoscope (sigmoidoscope) | Procedure | 45350 |
25 |
| Removal of external hemorrhoids by rubber banding | Procedure | 46221 |
22 |
| Diagnostic exam of large bowel using a flexible endoscope | Procedure | 45378 |
20 |
| Banding of hemorrhoids using a flexible endoscope (colonoscope) | Procedure | 45398 |
13 |
| Measurement of liver stiffness | Treatment | 91200 |
29 |
| Study of rectum sensitivity and function | Treatment | 91122 |
11 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other gastroenterology specialists at this location 2
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 4
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 32 related providers in 4 groups
Other gastroenterology specialists in Flushing 8
Same specialty, same city.
Trained at State University of New York Downstate Medical Center 8
Other providers in the same specialty who trained at the same institution.
Class of 1991 at State University of New York Downstate Medical Center 8
Providers who graduated from the same medical school in the same year.
Also performs Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 8
Providers in NY who bill this service to Medicare most often.
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.