Christina Mariyam Joy, MD
NPI 1639553605ActiveIndividual· Internal Medicine, Nephrology· Milwaukee, WI
Internal Medicine, Nephrology (MD) with The Medical College of Wisconsin Inc, practicing in Milwaukee, Wisconsin. Their prescriptions cost Medicare Part D more than their services did: $174,443 for 629 claims, against $31,905 paid for services in 2024. Novartis Pharmaceuticals Corporation was the largest of 2 companies reporting payments in 2025, $193.07 in all, mostly food and beverage. Lists Froedtert Memorial Lutheran Hospital as a hospital affiliation.
Overview
| NPI | 1639553605 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jul 19, 2015 |
| Last updated in NPPES | Jan 10, 2022 |
| Certified by provider | Jan 10, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | 76560 | 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 - Nephrology (WI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 137 |
|---|---|
| Services billed | 404 across 17 procedure codes |
| Paid by Medicare | $31,905 |
Part D prescriptions in 2024
| Prescriptions (claims) | 629 · 1,434 30-day fills |
|---|---|
| Patients | 117 |
| Total drug cost | $174,443 |
| Generic share | 82% of claims |
Education and affiliations
| Graduation year | 2011 |
|---|---|
| Medicare specialty | Nephrology |
| Telehealth | Offers telehealth |
Medical group
- The Medical College of Wisconsin IncMilwaukee, WI · 2,115 clinicians
Hospital affiliation
- Froedtert Memorial Lutheran HospitalMilwaukee, WI
Other facilities
- Wrcg MilwaukeeDialysis facility · Milwaukee, WI
Industry payments (Open Payments)
- 2025$193.07 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novartis Pharmaceuticals Corporation | $134.41 | 1 |
| Fisher & Paykel Healthcare Inc | $58.66 | 1 |
What the 2025 payments were for
- Food and Beverage$193.07 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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