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Edit this profileAt a glance
- 3808 Union St, Ste 3N, Flushing, NY 11354
About Dr. Chan
Sing Chan, M.D. practices gastroenterology in Flushing, NY. Sing is a 1991 graduate of State University of New York Downstate Medical Center. Medicare claims data shows Sing provided 1,134 services to 841 patients. The services billed most often include injection, adrenalin, epinephrine, 0.1 mg, established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more, and biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope. The provider's National Provider Identifier (NPI) is 1225053523.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (516) 238-6855
- Email not available
Practice Locations
3808 UNION ST STE 3N
Flushing, NY 11354
Conditions Commonly Evaluated or Treated
Within Gastroenterology generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
- Acid reflux
- Celiac disease
- Crohn's disease
- Hemorrhoids
- IBS
- Swallowing difficulties
- Ulcerative colitis
Biliary and pancreas
Colon and anorectal
Esophagus and swallowing
Functional bowel and motility
Liver
- Ascites
- Autoimmune hepatitis
- Cirrhosis
- Fatty liver disease
- Hemochromatosis
- Hepatitis B
- Hepatitis C
- Portal hypertension
Stomach and duodenum
Bowel & Colon
Digestive Symptoms
Gallbladder & Bile Ducts
Procedures & services
Most searched procedures
Lower endoscopy
Upper endoscopy
Capsule and physiology testing
Diagnostic Testing
Liver procedures
Treatments
Procedures Most Often Billed to Medicare
1,134 services · 841 patients · 17 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Procedure | 43239 |
143 | More often than most peers in Gastroenterology |
| Insertion of needle into vein for collection of blood sample | Procedure | 36415 |
44 | As often as other peers in Gastroenterology |
| Removal of polyps or growths of large bowel using an endoscope with mechanical snare | Procedure | 45385 |
43 | As often as other peers in Gastroenterology |
| Removal of multiple external hemorrhoids | Procedure | 46250 |
32 | Too few peers to compare |
| Banding of hemorrhoids using a flexible endoscope (sigmoidoscope) | Procedure | 45350 |
25 | Too few peers to compare |
| Removal of external hemorrhoids by rubber banding | Procedure | 46221 |
22 | Less often than most peers in Gastroenterology |
| Diagnostic exam of large bowel using a flexible endoscope | Procedure | 45378 |
20 | As often as other peers in Gastroenterology |
| Banding of hemorrhoids using a flexible endoscope (colonoscope) | Procedure | 45398 |
13 | Less often than most peers in Gastroenterology |
| Measurement of liver stiffness | Treatment | 91200 |
29 | As often as other peers in Gastroenterology |
| Study of rectum sensitivity and function | Treatment | 91122 |
11 | Less often than most peers in Gastroenterology |
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 gastroenterologists 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 gastroenterologists 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.
Common questions
What does Sing Chan specialize in?
Sing Chan is a gastroenterologist in Flushing, NY. That is the designation recorded for this NPI in the federal registry, where it is listed as “Gastroenterology”.
NPI registry
Where is Sing Chan located?
Sing 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 Sing Chan's phone number?
The number on file is (516) 238-6855. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Sing Chan?
Sing 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 Sing Chan train?
Sing 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 Sing Chan have?
Sing Chan has 35 years experience. Calculated from a graduation year of 1991, reported in the CMS National Downloadable File.
CMS public data
What does Sing Chan do most often?
According to Medicare billing data, Sing 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 Sing Chan's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Sing Chan. If this is you, claiming it is free.
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