Christina Mariyam Joy, MD

Medicare activity in 2024

Official CMS public-use data for Christina Mariyam Joy, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Most frequent services

1. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)59 services
2. Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)56 services
3. Hemodialysis procedure with physician evaluation (90935)46 services
4. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)46 services
5. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)41 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

• High blood pressure75%
• High cholesterol75%
• Chronic kidney disease75%
• Heart failure58%
• Diabetes51%
• Atrial fibrillation50%

Hospitals where Christina Mariyam Joy works

Medicare's Facility Affiliation Data lists Christina Mariyam Joy at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

• Froedtert Memorial Lutheran HospitalMilwaukee, WI · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 520177

Practice locations

Addresses where Christina Mariyam Joy is enrolled with Medicare (CMS data updated October 2, 2026).

• 10000 W Bluemound RdWauwatosa, WI 53226 (414) 454‑8000
• 200 Pleasant StMilwaukee, WI 53212 (414) 265‑5700
• 8701 W Watertown PlankMilwaukee, WI 53226 (414) 805‑3666
• 8701 Watertown Plank Rd, Room 4041 MfrcMilwaukee, WI 53226 (414) 805‑3666

Group practices

Medicare enrollment lists Christina Mariyam Joy as a member of this group (CMS data updated October 2, 2026).

• The Medical College of Wisconsin Inc2,115 clinicians in the group

Specialties

• Nephrologyprimary

Find other Nephrology doctors in Wisconsin →

Other nephrologists in Wauwatosa

Clinicians with the same Medicare primary specialty in Wauwatosa, WI — not a recommendation.

• Kamal Amin, MD
• Andrew J. Olafsson, MD
• Kumar Sujeet, MD
• Rima Patel, DO

All nephrologists in Wauwatosa →

Other clinicians in The Medical College of Wisconsin Inc

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

• John A. Logiudice, MD
• Alexandra K. Scholz, PSY
• Ruth Lee, DO
• Paia Yang-Xiong
• H A. Ubert, MD
• Jessica J. Kurowski

Clinician information

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
6. Medicare Care Compare — official Medicare tool to look up clinicians