You Sung Sang, M.D.
NPI 1275520892ActiveIndividual· Internal Medicine, Gastroenterology· Norwich, CT
Internal Medicine, Gastroenterology (M.D.) in Norwich, Connecticut, trained at Icahn School of Medicine at Mount Sinai (class of 1990). Their prescriptions cost Medicare Part D more than their services did: $1,821,826 for 2,453 claims, against $263,103 paid for services in 2024. Abbvie Inc. was the largest of 21 companies reporting payments in 2025, $5,624 in all, mostly food and beverage.
Overview
| NPI | 1275520892 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Sep 29, 2005 |
| Last updated in NPPES | Aug 15, 2014 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 034513 | CT |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Gastroenterology (CT) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 357 |
|---|---|
| Services billed | 11,634 across 36 procedure codes |
| Paid by Medicare | $263,103 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,453 · 4,324 30-day fills |
|---|---|
| Patients | 591 |
| Total drug cost | $1,821,826 |
| Generic share | 73% of claims |
Education and affiliations
| Medical school | Icahn School of Medicine at Mount Sinai |
|---|---|
| Graduation year | 1990 |
| Medicare specialty | Gastroenterology |
| Telehealth | Offers telehealth |
Medical group
- Connecticut Gi PLLCWallingford, CT · 248 clinicians
Hospital affiliation
- William W Backus HospitalNorwich, CT
Industry payments (Open Payments)
- 2025$5,624 · 170 payments from 21 companies
- 2024$15,418 · 162 payments from 23 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $1,170 | 31 |
| Phathom Pharmaceuticals, Inc. | $661.34 | 26 |
| Janssen Biotech, Inc. | $619.79 | 9 |
| Takeda Pharmaceuticals U.S.A., Inc. | $592.33 | 20 |
| Ardelyx, Inc. | $473.79 | 15 |
What the 2025 payments were for
- Food and Beverage$5,070 · 168 payments
- Consulting Fee$475.00 · 1 payment
- Education$79.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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