Phithao J. Nguyen, DO FAAFP
NPI 1740261585ActiveIndividual· Internal Medicine, Gastroenterology· Park Ridge, IL
Internal Medicine, Gastroenterology (DO FAAFP) with Prime Healthcare Illinois Medical Group LLC, practicing in Park Ridge, Illinois. 219 Medicare patients in 2024, $62,460 paid; nearly all of their 192 Part D prescriptions were generic (91%). Madrigal Pharmaceuticals was the largest of 3 companies reporting payments in 2025, $337.13 in all, mostly food and beverage. Lists Amita Health Resurrection Medical Center as a hospital affiliation.
Overview
| NPI | 1740261585 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO FAAFP |
| Sole proprietor | No |
| NPI issued | Nov 9, 2005 |
| Last updated in NPPES | Apr 19, 2022 |
| Certified by provider | Apr 19, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 036110939 | IL |
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 (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 219 |
|---|---|
| Services billed | 668 across 31 procedure codes |
| Paid by Medicare | $62,460 |
Part D prescriptions in 2024
| Prescriptions (claims) | 192 · 309 30-day fills |
|---|---|
| Patients | 67 |
| Total drug cost | $11,840 |
| Generic share | 91% of claims |
Education and affiliations
| Graduation year | 1998 |
|---|---|
| Medicare specialty | Gastroenterology |
| Secondary specialties | Internal Medicine |
Medical group
- Prime Healthcare Illinois Medical Group LLCChicago, IL · 322 clinicians
Hospital affiliation
- Amita Health Resurrection Medical CenterChicago, IL
Industry payments (Open Payments)
- 2025$337.13 · 4 payments from 3 companies
- 2024$517.08 · 19 payments from 10 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Madrigal Pharmaceuticals | $174.44 | 2 |
| Janssen Biotech, Inc. | $133.61 | 1 |
| Ipsen Biopharmaceuticals, Inc | $29.08 | 1 |
What the 2025 payments were for
- Food and Beverage$337.13 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other gastroenterologists in Park Ridge
- 1306092648
- 1114037041
- 1023014552