Nelson Tan Chao, M.D.
NPI 1619974896ActiveIndividual· Internal Medicine· Shelton, CT
Internal Medicine (M.D.) in Shelton, Connecticut, licensed in CT, with an NPI issued in July 2005. Their prescriptions cost Medicare Part D more than their services did: $787,737 for 5,321 claims, against $58,714 paid for services in 2024. Glaxosmithkline, LLC. reported $13.47 in payments in 2025, mostly food and beverage. Lists Bridgeport Hospital as a hospital affiliation.
Overview
| NPI | 1619974896 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jul 4, 2005 |
| Last updated in NPPES | Apr 24, 2024 |
| Certified by provider | Apr 24, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 032857 | CT |
| Internal Medicine, Pulmonary Disease | 207RP1001X | 032857 | CT |
| Allergy & Immunology | 207K00000X | 032857 | CT |
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 - Internal Medicine (CT) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 187 |
|---|---|
| Services billed | 932 across 24 procedure codes |
| Paid by Medicare | $58,714 |
Part D prescriptions in 2024
| Prescriptions (claims) | 5,321 · 11,987 30-day fills |
|---|---|
| Patients | 463 |
| Total drug cost | $787,737 |
| Generic share | 82% of claims |
Education and affiliations
| Graduation year | 1982 |
|---|---|
| Medicare specialty | Internal Medicine |
| Secondary specialties | Allergy/Immunology, Pulmonary Disease |
| Telehealth | Offers telehealth |
Hospital affiliation
- Bridgeport HospitalBridgeport, CT
Other facilities
- Stratford VnaHome health agency · Stratford, CT
Industry payments (Open Payments)
- 2025$13.47 · 1 payment from 1 company
- 2024$20.42 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Glaxosmithkline, LLC. | $13.47 | 1 |
What the 2025 payments were for
- Food and Beverage$13.47 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other internal medicine physicians in Shelton
- 1164449906
- 1427133354
- 1538423488
- 1568824589
- 1811938533
- 1083293518
- 1033163605
- 1033786876
- 1063358331
- 1083550347
- 1134065402
- 1144161449
All 42 internal medicine physicians in Shelton · All internal medicine physicians in Connecticut