Sean Fischer, MD

Medicare activity in 2024

Official CMS public-use data for Sean Fischer, 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. Injection, ferumoxytol, for treatment of iron deficiency anemia, 1 mg (non-esrd use) (Q0138)53,040 services
2. Injection, pembrolizumab, 1 mg (J9271)36,800 services
3. Injection, daratumumab, 10 mg and hyaluronidase-fihj (J9144)36,540 services
4. Injection, aprepitant, 1 mg (J0185)19,518 services
5. Injection, denosumab, 1 mg (J0897)15,120 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 cholesterol75%
• High blood pressure72%
• Arthritis56%
• Ischemic heart disease46%
• Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)39%
• Osteoporosis27%

Hospitals where Sean Fischer works

Medicare's Facility Affiliation Data lists Sean Fischer 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.

• Saint John's Health CenterSanta Monica, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050290
• Santa Monica - UCLA Medical Center & Orthopaedic HospitalSanta Monica, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050112

Practice locations

Addresses where Sean Fischer is enrolled with Medicare (CMS data updated October 2, 2026).

• 2001 Santa Monica Blvd, Suite 560wSanta Monica, CA 90404 (310) 453‑5654
• 2121 Santa Monica BlvdSanta Monica, CA 90404 (310) 829‑5511
• 2336 Santa Monica Blvd, Suite 204Santa Monica, CA 90404 (310) 829‑6789

Group practices

Medicare enrollment lists Sean Fischer as a member of this group (CMS data updated October 2, 2026).

• Providence Saint Johns Medical Foundation281 clinicians in the group

Specialties

• Hematology/Oncologyprimary

Find other Hematology/Oncology doctors in California →

Other hematologist-oncologists in Santa Monica

Clinicians with the same Medicare primary specialty in Santa Monica, CA — not a recommendation.

• Lawrence Piro, MD
• Maurice J. Berkowitz, MD
• Nicolaos J. Palaskas, MD
• Vivek D. Shah, MD
• Brian R. Wolf, MD
• Joseph M. Cleveland, MD
• Steven H. Applebaum, MD
• Manan P. Shah, MD

All hematologist-oncologists in Santa Monica →

Other clinicians in Providence Saint Johns Medical Foundation

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

• Glenn A. Gorlitsky, MD
• Jill T. Wei Doherty, MD
• Michelle A. Holmes, OD
• James H. Sul, MD
• Canty Wang, MD
• Klara Vogel, MD

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