Arun Reghunathan, MD

Medicare activity in 2024

Official CMS public-use data for Arun Reghunathan, 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. X-ray of chest, 1 view (71045)834 services
2. Ct scan head or brain without contrast (70450)381 services
3. X-ray of chest, 2 views (71046)207 services
4. Ct scan of abdomen and pelvis with contrast (74177)174 services
5. Ct scan of abdomen and pelvis without contrast (74176)151 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%
• Arthritis58%
• Diabetes41%
• Chronic kidney disease39%
• Ischemic heart disease38%

Hospitals where Arun Reghunathan works

Medicare's Facility Affiliation Data lists Arun Reghunathan 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.

• La Palma Intercommunity HospitalLa Palma, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: not listed by Medicare · CCN 050580
• Memorialcare Long Beach Medical CenterLong Beach, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: not listed by Medicare · CCN 050485
• UCI Health-OrangeOrange, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050348
• West Anaheim Medical CenterAnaheim, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050426

Practice locations

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

• 3751 Katella AveLos Alamitos, CA 90720 (562) 799‑3294

Group practices

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

• Los Alamitos Radiology Group Inc67 clinicians in the group

Specialties

• Diagnostic Radiologyprimary

Find other Diagnostic Radiology doctors in California →

Other radiologists in Los Alamitos

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

• Angela C. Sie, MD
• Jhemon H. Lee, MD
• Michael Crade, MD
• Vincent S. Polek, MD
• Gretchen M. Stipec, MD
• Grace S. Lee, MD
• Danielle Amato, MD
• Denis Bolton, DO

All radiologists in Los Alamitos →

Other clinicians in Los Alamitos Radiology Group Inc

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

• Jhemon H. Lee, MD
• Vincent S. Polek, MD
• Danielle Amato, MD
• Denis Bolton, DO
• Ankit B. Patel, DO

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