John A. Charlson, M.D.
NPI 1386668192ActiveIndividual· Internal Medicine, Hematology & Oncology· Milwaukee, WI
Internal Medicine, Hematology & Oncology (M.D.) in Milwaukee, Wisconsin, trained at University of Iowa, Rj & L Carver College of Medicine (class of 1999). Their prescriptions cost Medicare Part D more than their services did: $1,674,598 for 422 claims, against $27,391 paid for services in 2024. Deciphera Pharmaceuticals Inc. was the largest of 3 companies reporting payments in 2025, $20,721 in all, mostly speaking and faculty fees.
Overview
| NPI | 1386668192 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jul 26, 2006 |
| Last updated in NPPES | Oct 1, 2020 |
| Certified by provider | Oct 1, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | 42947 | WI |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Medical Oncology (WI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 124 |
|---|---|
| Services billed | 573 across 19 procedure codes |
| Paid by Medicare | $27,391 |
Part D prescriptions in 2024
| Prescriptions (claims) | 422 · 504 30-day fills |
|---|---|
| Patients | 75 |
| Total drug cost | $1,674,598 |
| Generic share | 79% of claims |
Education and affiliations
| Medical school | University of Iowa, Rj & L Carver College of Medicine |
|---|---|
| Graduation year | 1999 |
| Medicare specialty | Medical Oncology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- The Medical College of Wisconsin IncMilwaukee, WI · 2,115 clinicians
Hospital affiliations
- Community Memorial HospitalMenomonee Falls, WI
- Froedtert Memorial Lutheran HospitalMilwaukee, WI
- Holy Family MemorialManitowoc, WI
Industry payments (Open Payments)
- 2025$20,721 · 19 payments from 3 companies
- 2024$19,603 · 20 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Deciphera Pharmaceuticals Inc. | $16,079 | 15 |
| Ipsen Biopharmaceuticals, Inc | $4,534 | 3 |
| Syndax Pharmaceuticals, Inc. | $108.51 | 1 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$18,473 · 4 payments
- Travel and Lodging$1,580 · 7 payments
- Food and Beverage$668.47 · 8 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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