Phillip Yunmogee Chung, MD
NPI 1639165947ActiveIndividual· Internal Medicine, Gastroenterology· Northbrook, IL
Opted out of Medicare from October 2024 to October 2028. Internal Medicine, Gastroenterology (MD) in Northbrook, Illinois, licensed in WI, with an NPI issued in September 2005. Part D covered 117 prescriptions written in 2024, 91% of them generic. Abbvie Inc. was the largest of 18 companies reporting payments in 2025, $3,815 in all, mostly food and beverage.
Overview
| NPI | 1639165947 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Sep 22, 2005 |
| Last updated in NPPES | Nov 19, 2025 |
| Certified by provider | Nov 19, 2025 |
| Reactivated | Jul 3, 2018 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 45462 | WI |
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) | Not in the public enrollment file of Oct 1, 2026 |
|---|---|
| Opt-out | Opted out Oct 1, 2024 – Oct 1, 2028 |
| Can order and refer | Yes |
During an opt-out period the provider sees Medicare patients only under private contracts, and Medicare does not pay claims for their services.
Part D prescriptions in 2024
| Prescriptions (claims) | 117 · 240 30-day fills |
|---|---|
| Patients | 69 |
| Total drug cost | $32,688 |
| Generic share | 91% of claims |
Industry payments (Open Payments)
- 2025$3,815 · 167 payments from 18 companies
- 2024$3,140 · 139 payments from 22 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $732.09 | 32 |
| Janssen Biotech, Inc. | $551.93 | 25 |
| Takeda Pharmaceuticals U.S.A., Inc. | $468.97 | 24 |
| Madrigal Pharmaceuticals | $395.56 | 10 |
| Lilly USA, LLC | $249.88 | 9 |
What the 2025 payments were for
- Food and Beverage$3,731 · 166 payments
- Education$84.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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