Richard Charles Feldstein, M.D., MSC.
NPI 1851533699ActiveIndividual· Internal Medicine, Gastroenterology· Commack, NY
Internal Medicine, Gastroenterology (M.D., MSC.) in Commack, New York, licensed in NY, with an NPI issued in March 2009. Their prescriptions cost Medicare Part D more than their services did: $663,348 for 1,826 claims, against $351,776 paid for services in 2024. Salix Pharmaceuticals, A Division of Bausch Health US, LLC was the largest of 21 companies reporting payments in 2025, $4,444 in all, mostly food and beverage. Lists North Shore University Hospital and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1851533699 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D., MSC. |
| Sole proprietor | Yes |
| NPI issued | Mar 25, 2009 |
| Last updated in NPPES | Feb 4, 2022 |
| Certified by provider | Feb 4, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 003361 | NY |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Gastroenterology (NY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 981 |
|---|---|
| Services billed | 2,815 across 27 procedure codes |
| Paid by Medicare | $351,776 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,826 · 3,925 30-day fills |
|---|---|
| Patients | 578 |
| Total drug cost | $663,348 |
| Generic share | 80% of claims |
Education and affiliations
| Graduation year | 2002 |
|---|---|
| Medicare specialty | Gastroenterology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Hospital affiliations
- North Shore University HospitalManhasset, NY
- Ns/Lij Hs Huntington HospitalHuntington, NY
- St Catherine of Siena HospitalSmithtown, NY
Industry payments (Open Payments)
- 2025$4,444 · 262 payments from 21 companies
- 2024$3,537 · 218 payments from 19 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | $1,151 | 119 |
| Abbvie Inc. | $823.74 | 43 |
| Madrigal Pharmaceuticals | $523.97 | 13 |
| Qol Medical, LLC | $393.23 | 12 |
| Pfizer Inc. | $307.44 | 22 |
What the 2025 payments were for
- Food and Beverage$4,444 · 262 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other gastroenterologists in Commack
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- 1760607311
- 1972500858