Diana Sarkisyan, MD

Medicare activity in 2024

Official CMS public-use data for Diana Sarkisyan, 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. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)301 services
2. Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)96 services
3. Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)80 services
4. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)69 services
5. 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)50 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 pressure70%
• Arthritis57%
• Diabetes30%
• Ischemic heart disease30%
• Anxiety26%

Hospitals where Diana Sarkisyan works

Medicare's Facility Affiliation Data lists Diana Sarkisyan 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
• Ronald Reagan UCLA Medical CenterLos Angeles, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050262
• UCLA West Valley Medical CenterWest Hills, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050481

Practice locations

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

• 100 Moody Ct, Suite 200Thousand Oaks, CA 91360 (805) 418‑3500
• 2020 Santa Monica Blvd, Suite 210Santa Monica, CA 90404 (310) 458‑2381

Group practices

Medicare enrollment lists Diana Sarkisyan 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

• Internal Medicineprimary

Find other Internal Medicine doctors in California →

Other internal medicine doctors in Thousand Oaks

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

• Nithyalakshimi Nambiar, MD
• Nina R. Levy, MD
• Shalra H. Yousufi, MD
• Sonia Monga, MD
• Russell Hines, MD
• Jigar P. Ghelani, MD
• Andre Yousefia, MD
• Lauren H. Beshay, MD

All internal medicine doctors in Thousand Oaks →

Other clinicians in The Regents of the University of California

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

• Maxwell J. Kroloff, MD
• Ruchi Jain, DO
• Nithyalakshimi Nambiar, MD
• Benjamin Ansell, MD
• Roseann S. Chu, MD
• Diana Dermendjian, 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