Quick answers
- Does Andrew J. Mikaelian accept Medicare assignment?
- Yes. Medicare's clinician data says Andrew J. Mikaelian 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 Andrew J. Mikaelian see?
- In 2024, CMS data shows 1,194 Original Medicare patients and 5,352 services for Andrew J. Mikaelian. This counts Original Medicare only and measures volume, not quality.
- What is Andrew J. Mikaelian's NPI number?
- 1891740973. 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 Andrew J. Mikaelian, 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 | 1,194 |
|---|---|
| Services billed to Medicare | 5,352 |
| Different services or procedures | 69 |
| Participating Medicare provider | Yes |
| Average age of these patients | 77 |
Most frequent services
- Removal of impacted ear wax (69210)1,765 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)1,609 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)433 services
- Removal of growth in soft tissue of ear canal (69145)324 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)188 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 pressure68%
- Arthritis53%
- Ischemic heart disease31%
- Diabetes23%
- Osteoporosis23%
Hospitals where Andrew J. Mikaelian works
Medicare's Facility Affiliation Data lists Andrew J. Mikaelian 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 Andrew J. Mikaelian is enrolled with Medicare (CMS data updated October 2, 2026).
- 1240 Westlake Blvd, Suite 135Westlake Village, CA 91361 (805) 494‑9993
Specialties
- Otolaryngologyprimary
Other ENT doctors in California
Clinicians with the same Medicare primary specialty in California — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Medical College Of Wisconsin |
| Graduation year | 1984 (42 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1891740973 |
| 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