Yoojin Kim Pak, M.D.
NPI 1003072877ActiveIndividual· Internal Medicine, Endocrinology, Diabetes & Metabolism· Lisle, IL
Internal Medicine, Endocrinology, Diabetes & Metabolism (M.D.) in Lisle, Illinois, trained at Chicago College of Medicine and Surgery (class of 2008). Their prescriptions cost Medicare Part D more than their services did: $1,927,122 for 4,857 claims, against $175,962 paid for services in 2024. Novo Nordisk Inc was the largest of 11 companies reporting payments in 2025, $579.05 in all, mostly food and beverage.
Overview
| NPI | 1003072877 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jul 31, 2008 |
| Last updated in NPPES | Aug 16, 2023 |
| Certified by provider | Aug 16, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Endocrinology, Diabetes & Metabolism Primary | 207RE0101X | 036127398 | IL |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Endocrinology (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 421 |
|---|---|
| Services billed | 8,689 across 63 procedure codes |
| Paid by Medicare | $175,962 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,857 · 12,820 30-day fills |
|---|---|
| Patients | 594 |
| Total drug cost | $1,927,122 |
| Generic share | 49% of claims |
Education and affiliations
| Medical school | Chicago College of Medicine and Surgery |
|---|---|
| Graduation year | 2008 |
| Medicare specialty | Endocrinology |
| Telehealth | Offers telehealth |
Medical group
- Dupage Medical Group LtdWinfield, IL · 1,322 clinicians
Hospital affiliations
- Advocate Good Samaritan HospitalDowners Grove, IL
- Edward HospitalNaperville, IL
Industry payments (Open Payments)
- 2025$579.05 · 30 payments from 11 companies
- 2024$274.38 · 13 payments from 7 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novo Nordisk Inc | $134.60 | 8 |
| Lilly USA, LLC | $131.33 | 7 |
| Sequel Med Tech, LLC | $75.35 | 4 |
| Insulet Corporation | $72.30 | 3 |
| Radius Health, Inc. | $53.45 | 2 |
What the 2025 payments were for
- Food and Beverage$579.05 · 30 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Endocrinology, Diabetes & Metabolism providers in Lisle
- 1912988247
All Internal Medicine, Endocrinology, Diabetes & Metabolism providers in Illinois →