Quick answers
- Does Derenik Estepanian accept Medicare assignment?
- Yes. Medicare's clinician data says Derenik Estepanian accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Derenik Estepanian see?
- In 2024, CMS data shows 743 Original Medicare patients and 2,357 services for Derenik Estepanian. This counts Original Medicare only and measures volume, not quality.
- What is Derenik Estepanian's NPI number?
- 1457714982. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Derenik Estepanian, 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.
| Original Medicare patients | 743 |
|---|---|
| Services billed to Medicare | 2,357 |
| Different services or procedures | 17 |
| Participating Medicare provider | Yes |
| Average age of these patients | 77 |
Most frequent services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)1,031 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)588 services
- Hospital discharge day management, more than 30 minutes (99239)382 services
- Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)169 services
- Advance care planning, first 30 minutes (99497)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 blood pressure75%
- High cholesterol75%
- Arthritis74%
- Ischemic heart disease64%
- Diabetes60%
- Heart failure60%
Hospitals where Derenik Estepanian works
Medicare's Facility Affiliation Data lists Derenik Estepanian 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.
- Cedars-Sinai Medical CenterLos Angeles, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050625
- Glendale Adventist Medical CenterGlendale, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050239
- Keck Hospital of USCLos Angeles, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: not listed by Medicare · CCN 050696
- St Johns Regional Medical CenterOxnard, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050082
- USC Verdugo Hills HospitalGlendale, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050124
Practice locations
Addresses where Derenik Estepanian is enrolled with Medicare (CMS data updated October 2, 2026).
- 1509 Wilson TerGlendale, CA 91206 (818) 409‑8000
- 1600 N Rose AveOxnard, CA 93030 (805) 988‑2500
- 1812 Verdugo BlvdGlendale, CA 91208 (818) 246‑8000
- 2309 Antonio AveCamarillo, CA 93010 (805) 389‑5800
- 8700 Beverly BlvdWest Hollywood, CA 90048 (818) 333‑3164
Group practices
Medicare enrollment lists Derenik Estepanian as a member of these groups (CMS data updated October 2, 2026).
- Galen Inpatient Physicians PC1,077 clinicians in the group
- Inpatient Specialists of California PC385 clinicians in the group
- Concord Hospitalist Group a Medical Corporation15 clinicians in the group
Specialties
- Internal Medicineprimary
- Hospitalistalso
Other internal medicine doctors in Glendale
Clinicians with the same Medicare primary specialty in Glendale, CA — not a recommendation.
Other clinicians in Galen Inpatient Physicians PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2016 (10 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1457714982 |
| Corrections | Report an error or suggest an update → |
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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians