Dr. Richard Charles Feldstein, MD, MS

Dr. Feldstein practices at St. Catherine of Siena Hospital in Smithtown, New York, part of Diocese of Rockville Centre.

Dr. Feldstein's NPI, 1851533699, was assigned on March 25, 2009. Dr. Feldstein graduated from St. George's University School of Medicine in 2002. Dr. Feldstein holds New York license 003361.

Dr. Feldstein's primary practice is St. Catherine of Siena Hospital, at 50 Route 25A, Smithtown, NY 11787 in Suffolk County. The practice phone is (631) 862-3000.

Dr. Feldstein's primary practice is St. Catherine of Siena Hospital in Smithtown, New York, part of Diocese of Rockville Centre. Dr. Feldstein is also affiliated with North Shore University Hospital. The medical group on file is Robert M. Lazar, M.D., P.C. Dmand AI also links Dr. Feldstein to 1 more hospital and 1 group practice or clinic, each named with a free account.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Feldstein practices, 4 sites in all. Vendor and product names are available with a free account.

Gastroenterology is Dr. Feldstein's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Feldstein is board certified in gastroenterology by the American Board of Internal Medicine. Dr. Feldstein is licensed in New York.

Dmand AI lists acid reflux, acute gastroduodenitis, chronic indigestion, chronic inflammatory bowel disease (IBD), cirrhosis of the liver, colonoscopy, gastroduodenitis and gastroenteritis among the conditions Dr. Feldstein treats.

CMS data shows 2,761 Medicare services from Dr. Feldstein across 11 procedure codes in 2024, for 981 Medicare patients. Medicare paid $339,511 for them.

CMS counts 981 Medicare patients who saw Dr. Feldstein in 2024. The largest group is 65 to 74, with 462 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 7% are also on Medicaid. Their average risk score is 1.30, where 1.00 is the Medicare average.

Across all payers, Dmand AI patient panel data puts Dr. Feldstein's median patient age at 60, with 49% women.

In 2024, Dr. Feldstein wrote 1,826 Medicare Part D claims for 578 patients. 80% of them were for generic drugs. CMS names the drug for 1,669 of them, across 20 drugs with 11 or more claims each, at $417,519 in total drug cost. In 2023, CMS named 1,177 claims across 18 drugs.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 73 out of 100 for Dr. Feldstein for performance year 2024, reported individually. Dr. Feldstein accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Feldstein as offering telehealth. CMS counts 175 procedures of colonoscopy by Dr. Feldstein, more than 91% of the clinicians it reports for that procedure.

Dmand AI links 4 papers to Dr. Feldstein, published from 2006 to 2008.

CMS Open Payments shows 1,525 general payments to Dr. Feldstein from 45 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Bausch Health Americas, Inc. paid the most, $6,062.

Dr. Feldstein graduated from St. George's University School of Medicine in 2002.

Dr. Feldstein is in network with 14 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.