John C. Christianson, M.D
NPI 1114021151ActiveIndividual· Internal Medicine, Infectious Disease· Milwaukee, WI
Internal Medicine, Infectious Disease (M.D) in Milwaukee, Wisconsin, trained at Medical College of Wisconsin (class of 1983). Their prescriptions cost Medicare Part D more than their services did: $473,195 for 854 claims, against $97,479 paid for services in 2024. Abbvie Inc. was the largest of 2 companies reporting payments in 2025, $346.65 in all, mostly food and beverage.
Overview
| NPI | 1114021151 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D |
| Sole proprietor | No |
| NPI issued | Sep 11, 2006 |
| Last updated in NPPES | Jul 8, 2007 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Infectious Disease Primary | 207RI0200X | 27387 | 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 - Internal Medicine (WI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 293 |
|---|---|
| Services billed | 1,446 across 18 procedure codes |
| Paid by Medicare | $97,479 |
Part D prescriptions in 2024
| Prescriptions (claims) | 854 · 1,011 30-day fills |
|---|---|
| Patients | 137 |
| Total drug cost | $473,195 |
| Generic share | 93% of claims |
Education and affiliations
| Medical school | Medical College of Wisconsin |
|---|---|
| Graduation year | 1983 |
| Medicare specialty | Internal Medicine |
| Secondary specialties | Infectious Disease |
Hospital affiliations
- Ascension All Saints HospitalRacine, WI
- Ascension Se Wisconsin HospitalMilwaukee, WI
- Ascension St Francis HospitalMilwaukee, WI
- Aurora St Lukes Medical CenterMilwaukee, WI
- West Allis Memorial HospitalWest Allis, WI
Other facilities
- Ascension at HomeHome health agency · Milwaukee, WI
Industry payments (Open Payments)
- 2025$346.65 · 10 payments from 2 companies
- 2024$103.06 · 5 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $252.67 | 9 |
| Smith+nephew, Inc. | $93.98 | 1 |
What the 2025 payments were for
- Food and Beverage$346.65 · 10 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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