Charles Changik Chung, MD
NPI 1639661788ActiveIndividual· Obstetrics & Gynecology· Milwaukee, WI
Obstetrics & Gynecology (MD) in Milwaukee, Wisconsin, trained at University of Massachusetts Medical School (class of 2018). 43 Medicare patients in 2024, $4,986 paid; nearly all of their 55 Part D prescriptions were generic (93%). Channel Medsystems, Inc. was the largest of 2 companies reporting payments in 2025, $159.01 in all, mostly food and beverage.
Overview
| NPI | 1639661788 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 5, 2018 |
| Last updated in NPPES | Aug 7, 2024 |
| Certified by provider | Aug 7, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Obstetrics & Gynecology Primary | 207V00000X | 77142-20 | 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) | Enrolled Practitioner - Obstetrics/Gynecology (WI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 43 |
|---|---|
| Services billed | 92 across 18 procedure codes |
| Paid by Medicare | $4,986 |
Part D prescriptions in 2024
| Prescriptions (claims) | 55 · 84 30-day fills |
|---|---|
| Patients | 34 |
| Total drug cost | $1,520 |
| Generic share | 93% of claims |
Education and affiliations
| Medical school | University of Massachusetts Medical School |
|---|---|
| Graduation year | 2018 |
| Medicare specialty | Obstetrics/Gynecology |
Medical group
- Madison Medical Affiliates IncMilwaukee, WI · 86 clinicians
Hospital affiliation
- Ascension Columbia St Marys Hospital MilwaukeeMilwaukee, WI
Industry payments (Open Payments)
- 2025$159.01 · 2 payments from 2 companies
- 2024$28.69 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Channel Medsystems, Inc. | $143.39 | 1 |
| Hologic Sales and Service, LLC | $15.62 | 1 |
What the 2025 payments were for
- Food and Beverage$159.01 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other OB-GYNs in Milwaukee
- 1073837332
- 1083939367
- 1194790378
- 1245673847
- 1255794376
- 1265511471
- 1275506321
- 1346549680
- 1437238227
- 1457305708
- 1457594483
- 1528420064