Meri Antossyan, D.O
Individual provider Active NPI Family Medicine Physician · Valencia, CA
NPI 1457738460 · NPPES record last updated Jan 6, 2026
Key facts
- NPI
- 1457738460
- Entity type
- Individual (NPI type 1)
- Primary specialty
- Family Medicine Physician 207Q00000X
- License
- 20A13819 (CA)
- Practice address
- 23861 McBean Pkwy Ste E24
Valencia, CA 91355-4457 - Phone
- (661) 284-3100
- NPI assigned
- Apr 28, 2015
- Sex
- Female
- Sole proprietor
- Yes
Organizations & group practices 19
Hospital & facility affiliations 2
Owned or controlled facilities with NPI records 1
Medicare Care Compare profile
- Specialty
- Family Practice
- Education
- Other, 2013
- Medicare assignment
- Accepts the Medicare-approved amount as payment in full
- Telehealth
- Offers telehealth services
- Group practices
- Regents of the University of California
Adventist Health Physicians Network
The Regents of the University of California
Practice addresses (Care Compare)
1000 Flower St
Glendale, CA 91201-3007
Phone (818) 659-5000
1560 E Chevy Chase Dr
Suite 355
Glendale, CA 91206-4159
Phone (747) 212-3441
2020 Santa Monica Blvd
Suite 210
Santa Monica, CA 90404-2139
Phone (310) 458-2381
2750 Sycamore Dr
Simi Valley, CA 93065-1500
4323 W Riverside Dr
Burbank, CA 91505-4044
Phone (818) 556-2700
Hospital & facility affiliations
- A to Z Home Health, Inc
- Glendale Adventist Medical Center
Merit-based Incentive Payment System (MIPS)
- Final score
- 95.77 of 100
- Quality
- 81.54
- Promoting interoperability
- 100
- Improvement activities
- 40
Medicare participation
- Medicare fee-for-service enrollment
- Enrolled in CA
- Eligible to order & refer
- Part B services: Yes · DME: Yes · Home health: Yes · Power mobility devices: Yes · Hospice: Yes
All facility ownership & control disclosures 1
| Facility | Type | Role | Since |
|---|---|---|---|
| Ararat Post Acute |
Skilled nursing facility | Operational/Managerial Control Adp of the SNF |
Mar 1, 2023 Mar 1, 2023 |
Medicare enrollment records
| Enrollment ID | State | Provider type | PAC ID | Details |
|---|---|---|---|---|
| I20161005001389 | CA | Practitioner - Family Practice | 4082902192 | Reassigns benefits to 3 organizations |
National Provider Directory
- Medicare enrollment (NPD)
- Yes
- Credentials
- Doctor of Osteopathy
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| 20A13819 | CA | MD | Family Medicine Physician |
Practice roles (8 of 9)
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| Regents of the University of California | Current |
Accepting new patients | |
| Adventist Health Physicians Network | Family Medicine | Current | Accepting new patients |
| The Regents of the University of California | Current |
Accepting new patients | |
| Adventist Health Physicians Network | Current |
Accepting new patients | |
| The Regents of the University of California | Family Medicine | Current |
Accepting new patients |
| Adventist Health Physicians Network | Current |
Accepting new patients | |
| Regents of the University of California | Family Medicine | Current |
Accepting new patients |
| Cedars-Sinai Medical Center | Past |
Accepting new patients |
Locations
1509 Wilson Ter
Glendale, CA 91206
Phone (818) 409-8071
1000 Flower St
Glendale, CA 91201
Phone (818) 659-5000
1975 Verdugo Blvd
Ste A
La Canada Flintridge, CA 91011
Phone (747) 212-3441
24302 Paseo de Valencia
Ste 200
Laguna Hills, CA 92653
Phone (949) 458-8252
5767 W Century Blvd
Ste 400
Los Angeles, CA 90045
Phone (310) 301-5200
File 55737
Los Angeles, CA 90074
File 59755
Los Angeles, CA 90074
892 Aerovista Pl
Ste 240
San Luis Obispo, CA 93401
Phone (805) 541-8252
2020 Santa Monica Blvd
Ste 210
Santa Monica, CA 90404
Phone (310) 458-2381
100 Moody Ct
Ste 200
Thousand Oaks, CA 91360
Phone (805) 418-3500
23861 McBean Pkwy
Ste E24
Valencia, CA 91355
Phone (661) 259-8252
Networks
- BSC 65 PLUS INDIVIDUAL MAPD
Interoperability endpoints
- mar104pcs@m1796.primeclinicalsystems.direct-ci.com
Specialties & licenses
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Family Medicine Physician | 207Q00000X | 20A13819 | CA | Yes |
Addresses
Primary practice location
23861 McBean Pkwy Ste E24
Valencia, CA 91355-4457
Mailing address
5767 W Century Blvd Ste 400
Los Angeles, CA 90045-5631
Other practice location 1
1975 Verdugo Blvd Ste A
LA Canada Flintridge, CA 91011-3024
Phone (747) 212-3441
Other practice location 2
544 N Glendale Ave Ste B
Glendale, CA 91206-3311
Phone (747) 212-3441
Other names
- Mary Antossyan
Other providers in Valencia, CA
- Takla Rafat Anis
- Antelope Valley Family Optometry, Inc
- Anthony D. Panasci MD Professional Corporation
- Aaron Antonio
- David Antonyan
- Jenefer Anumba
- Akiko Aoki
- Maureen Caroline Aoys
- Nareeporn Apaipakdi Lutzke
- Fabrizio Apodaca
All providers in Valencia, CA · Family Medicine Physician in California
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Record last updated by the provider on Jan 6, 2026. Information in NPPES is self-reported and not verified by CMS.
- NUCC Health Care Provider Taxonomy: specialty names.
- Medicare Fee-For-Service Public Provider Enrollment (CMS/PECOS): enrollments, PAC IDs and benefit reassignments.
- CMS facility enrollments, All Owners and change-of-ownership files: CCNs, owners and managing parties.
- Provider of Services files (CMS): certification status, beds and related CCNs.
- Order and Referring (CMS).
- Medicare Care Compare provider data (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.