Hagop V. Karpanian, MD

Medicare activity in 2024

Official CMS public-use data for Hagop V. Karpanian, 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. Insertion of artery tube for blood sampling or infusion through skin (36620)30 services
2. Anesthesia for x-ray on artery of brain, heart, or chest (01926)26 services
3. Anesthesia for x-ray or radiation therapy (01922)24 services
4. Anesthesia for procedure for total knee joint replacement (01402)21 services
5. Anesthesia for total hip replacement (01214)19 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%
• Arthritis62%
• Ischemic heart disease42%
• Atrial fibrillation40%
• Diabetes27%

Hospitals where Hagop V. Karpanian works

Medicare's Facility Affiliation Data lists Hagop V. Karpanian 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.

• Los Robles Hospital & Medical CenterThousand Oaks, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050549

Practice locations

Addresses where Hagop V. Karpanian is enrolled with Medicare (CMS data updated October 2, 2026).

• 215 W Janss RdThousand Oaks, CA 91360 (805) 497‑2727

Group practices

Medicare enrollment lists Hagop V. Karpanian as a member of this group (CMS data updated October 2, 2026).

• Conejo Los Robles Anesthesiology Medical Group Inc29 clinicians in the group

Specialties

• Anesthesiologyprimary

Find other Anesthesiology doctors in California →

Other anesthesiologists in Thousand Oaks

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

• Matthew S. Vandiver, MD
• Brannon Y. Altenhofen, MD
• Maziar M. Nourian, MD
• Andrew A. Ghobrial, MD
• Jun K. Park
• Jerry J. Markar, MD
• Dylan Chandiram, DO
• Andrea Poon, MD

All anesthesiologists in Thousand Oaks →

Other clinicians in Conejo Los Robles Anesthesiology Medical Group Inc

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

• Andrew A. Ghobrial, MD
• Gabriel B. Stolin, DO
• Fernando R. Santos Iv, MD
• Victor A. Perkins, DO
• Scott D. Picker, MD
• Jason E. Cohen, 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