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Physician

WALLEN CHAN, M.D.

Gastroenterology

STATEN ISLAND, NY, 10314
NPI: 1043287857

Contact

Gastroenterology

STATEN ISLAND, NY

RICHMOND UNIVERSITY MEDICAL CENTER

718-354-5047

rumcsi.org

Hospital Affiliations

Search procedure prices at these hospitals only · all code types (Gastroenterology & related)

Common Procedures for Gastroenterology

ColonoscopyUpper Endoscopy (EGD)Capsule EndoscopyLiver BiopsyERCPHemorrhoid BandingPolyp RemovalEsophageal DilationPEG Tube PlacementFibroScan

Based on specialty. Actual services may vary — contact the provider's office to confirm.

MIPS Quality Score

PY 2023
66.8/100Average
Quality
83.3
Promoting Interoperability
0.6
Improvement Activities
40.0

MIPS (Merit-based Incentive Payment System) scores measure quality, cost, and improvement activities. Higher is better. Learn more at qpp.cms.gov

Procedure Pricing (Medicare Data)

Based on CMS Medicare Provider Utilization data for 2023. These represent what this physician charged Medicare, not necessarily what you would pay. Compare with other physicians

ProcedureAvg ChargeMedicare AllowedMedicare PaidServices
45385
Removal of polyps or growths of large bowel using an endoscope with mechanical snare
$1,097$294$22960
45378
Diagnostic exam of large bowel using a flexible endoscope
$814$205$15134
43239
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope
$715$127$9668
99204
New patient office or other outpatient visit, 45-59 minutes
$286$194$122100
99214
Established patient office or other outpatient visit, 30-39 minutes
$212$146$104244
99305
Initial nursing facility care with moderate level of medical decision making, per day, if using time, at least 35 minutes
$200$153$11416
99490
Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month
$200$72$5639
99213
Established patient office or other outpatient visit, 20-29 minutes
$145$101$73106
88305
Pathology examination of tissue using a microscope, intermediate complexity
$100$40$3157
88313
Special stained specimen slides to examine tissue including interpretation and report
$100$13$1146
J7040
Infusion, normal saline solution, sterile (500 ml = 1 unit)
$15$1$120

Compare prices for procedures performed by Gastroenterology physicians

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Physician identity data from the NPPES NPI Registry. Last synced 3/28/2026.