Maryam Hajiabbasi, MD

Medicare activity in 2024

Official CMS public-use data for Maryam Hajiabbasi, 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. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)17 services
2. Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)12 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%
• Ischemic heart disease61%
• Arthritis57%
• Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)57%
• Chronic kidney disease50%

Hospitals where Maryam Hajiabbasi works

Medicare's Facility Affiliation Data lists Maryam Hajiabbasi 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.

• Ronald Reagan UCLA Medical CenterLos Angeles, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050262
• 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 Maryam Hajiabbasi is enrolled with Medicare (CMS data updated October 2, 2026).

• 2020 Santa Monica Blvd, Suite 210Santa Monica, CA 90404 (310) 458‑2381
• 757 Westwood PlzLos Angeles, CA 90095 (310) 267‑9643
• 757 Westwood Plz, Suite 7501Los Angeles, CA 90095 (310) 267‑9643

Group practices

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

• The Regents of the University of California1,462 clinicians in the group

Specialties

• Hospitalistprimary
• Internal Medicinealso

Find other Hospitalist doctors in California →

Other hospitalists in Santa Monica

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

• Sina Shafiei, MD
• Chun Hin Chan, MD
• Shira M. Peress, MD
• Sneha S. Shaha, DO
• Shannon R. Bell, DO
• Bardia Adibmoradi, MD
• Elan G. Shahrabani, MD
• Christian B. Fagel, MD

All hospitalists in Santa Monica →

Other clinicians in The Regents of the University of California

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

• Grace I. Chen, MD
• Bartosz Chmielowski, MD
• Sina Shafiei, MD
• Hannah J. Kwak, MD
• Maninder S. Kaler, MD
• Frederick I. Ferguson, 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