Astkhik Mangasarian, DO

Medicare activity in 2024

Official CMS public-use data for Astkhik Mangasarian, 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. Emergency department visit with high level of medical decision making (99285)73 services
2. Critical care, first 30-74 minutes (99291)13 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%
• Arthritis75%
• Diabetes64%
• Depression56%
• Anxiety55%

Hospitals where Astkhik Mangasarian works

Medicare's Facility Affiliation Data lists Astkhik Mangasarian 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.

• Adventist Health Simi ValleySimi Valley, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050236
• Glendale Adventist Medical CenterGlendale, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050239
• Huntington HospitalPasadena, CA · Acute Care Hospital · Emergency services: listed by Medicare · CCN 050438
• Loma Linda University Medical CenterLoma Linda, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050327

Practice locations

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

• 100 W California BlvdPasadena, CA 91105
• 11370 Anderson StLoma Linda, CA 92354
• 1511 W Glenoaks BlvdGlendale, CA 91201 (818) 637‑2200
• 25455 Barton Rd, Suite 108aLoma Linda, CA 92354 (909) 558‑4000

Group practices

Medicare enrollment lists Astkhik Mangasarian as a member of these groups (CMS data updated October 2, 2026).

• Faculty Physicians and Surgeons of Llusm1,315 clinicians in the group
• HMH Emergency Medical Group, Inc.60 clinicians in the group
• Vista Critical Care Associates Inc15 clinicians in the group

Specialties

• Critical Care (Intensivists)primary

Find other Critical Care (Intensivists) doctors in California →

Other critical care doctors in Pasadena

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

• Ayman Saad, MD
• Manshu Yan, MD
• Daryl P. Banta, MD
• Christian Hernandez, MD
• Sabrina Bawa, MD

All critical care doctors in Pasadena →

Other clinicians in Faculty Physicians and Surgeons of Llusm

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

• Beatriz V. Leong, MD
• Ashish Bhalla, MD
• Ryan Serrano, MD
• Samantha Garvanovic, MD
• Kaitlin Santillan, PA
• J P. Jacobson, 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