Nelson Ta-Ching Chuang, M.D., M.H.S.
NPI 1336427004ActiveIndividual· Internal Medicine, Gastroenterology· Frederick, MD
Internal Medicine, Gastroenterology (M.D., M.H.S.) in Frederick, Maryland, trained at Rutgers R W Johnson Medical School (Cam/New Bruns/Pisc) (class of 2011). Their prescriptions cost Medicare Part D more than their services did: $472,160 for 393 claims, against $93,201 paid for services in 2024. Abbvie Inc. was the largest of 20 companies reporting payments in 2025, $2,662 in all, mostly food and beverage.
Overview
| NPI | 1336427004 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D., M.H.S. |
| Sole proprietor | Yes |
| NPI issued | Jul 29, 2011 |
| Last updated in NPPES | Nov 7, 2023 |
| Certified by provider | Nov 7, 2023 |
| Reactivated | Oct 10, 2019 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | D0088057 | MD |
| Student in an Organized Health Care Education/Training Program | 390200000X | — | — |
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 (DC); Practitioner - Gastroenterology (MD) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 449 |
|---|---|
| Services billed | 930 across 33 procedure codes |
| Paid by Medicare | $93,201 |
Part D prescriptions in 2024
| Prescriptions (claims) | 393 · 935 30-day fills |
|---|---|
| Patients | 111 |
| Total drug cost | $472,160 |
| Generic share | 85% of claims |
Education and affiliations
| Medical school | Rutgers R W Johnson Medical School (Cam/New Bruns/Pisc) |
|---|---|
| Graduation year | 2011 |
| Medicare specialty | Gastroenterology |
Medical group
- Frederick Gastroenterology Associates PAFrederick, MD · 16 clinicians
Hospital affiliations
- Frederick Health HospitalFrederick, MD
- Holy Cross Germantown HospitalGermantown, MD
Industry payments (Open Payments)
- 2025$2,662 · 119 payments from 20 companies
- 2024$2,203 · 111 payments from 23 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $370.74 | 17 |
| Takeda Pharmaceuticals U.S.A., Inc. | $315.63 | 14 |
| Janssen Biotech, Inc. | $311.78 | 10 |
| Pfizer Inc. | $289.26 | 14 |
| Ardelyx, Inc. | $181.60 | 6 |
What the 2025 payments were for
- Food and Beverage$2,552 · 117 payments
- Education$109.48 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 27 gastroenterologists in Frederick · All gastroenterologists in Maryland