Meri Antossyan, D.O

Primary specialty

Family Medicine PhysicianTaxonomy code 207Q00000X

License

20A13819 Issued in CA

Practice address

23861 McBean Pkwy Ste E24
Valencia, CA 91355-4457

Phone

(661) 284-3100

NPI assigned

Apr 28, 2015

Last updated

Jan 6, 2026By the provider in NPPES

Sex

Female

Sole proprietor

Yes

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 1

Addresses

Other names 1

• Mary Antossyan Other name

Medicare fee-for-service enrollment

Enrolled in CA

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 1

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 CaliforniaGroup PAC ID 5294958815, 84 clinicians

Adventist Health Physicians NetworkGroup PAC ID 3274580972, 628 clinicians

The Regents of the University of CaliforniaGroup PAC ID 1355248584, 1,426 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• A to Z Home Health, Inc Home health agency, Glendale, CA, CCN 059012
• Glendale Adventist Medical Center Hospital, Glendale, CA, CCN 050239

Merit-based Incentive Payment System (MIPS)

Final score

95.77 of 100Reported as apm

Quality

81.54

Promoting interoperability

100

Improvement activities

40

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Osteopathy

State licenses

Practice roles

Locations

Networks

• BSC 65 PLUS INDIVIDUAL MAPD

Interoperability endpoints

• Direct secure messaging: mar104pcs@m1796.primeclinicalsystems.direct-ci.com

All facility ownership & control disclosures 1

Facilities whose Medicare enrollment lists this provider’s PECOS associate ID as an owner or managing party.

Owned or controlled facilities with NPI records 1

Facilities whose Medicare enrollment lists this provider as an owner, officer, director or managing party.

• Ararat Home of Los Angeles, Inc.

  dba Ararat Post Acute

  • Skilled Nursing Facility
  • Glendale, CA
  • NPI 1649906348

  Adp of the SNF, Operational/Managerial Control

  CMS ownership

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

• Adventist Health Physicians Network

  • Family Medicine Physician
  • Glendale, CA
  • NPI 1083976294
  Medicare reassignment Care Compare group NPD
• Regents of the University of California

  dba UCLA Entertainment Ind MedGrp

  • Internal Medicine Physician
  • Glendale, CA
  • NPI 1891110888

  Family Medicine

  Medicare reassignment Care Compare group NPD
• The Regents of the University of California

  dba UCLA Dept of Medicine

  • Internal Medicine Physician
  • Los Angeles, CA
  • NPI 1235107566

  Family Medicine

  Medicare reassignment Care Compare group NPD
• Adventist Health Physicians Network

  • Physical Therapy Clinic/Center
  • Paradise, CA
  • NPI 1134092190
  NPD
• Adventist Health Physicians Network

  • Orthopaedic Surgery Physician
  • Glendale, CA
  • NPI 1780064576
  NPD
• Regents of the University of California

  dba UCLA Entertainment Ind Medgrp

  • Durable Medical Equipment & Medical Supplies
  • Woodland Hills, CA
  • NPI 1083063127
  NPD
• The Regents of the University of California

  dba UCLA Dept of Medicine

  • Ambulatory Surgical Clinic/Center
  • Valencia, CA
  • NPI 1689200305
  NPD
• Cedars-Sinai Medical Center

  • General Acute Care Hospital
  • Los Angeles, CA
  • NPI 1639172372
  NPD (past)

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

• A to Z Home Health, Inc.

  • Home Health Agency
  • Glendale, CA
  • NPI 1497880645
  Care Compare affiliation
• Glendale Adventist Medical Center

  dba Adventist Health Glendale

  • General Acute Care Hospital
  • Glendale, CA
  • NPI 1831188275
  Care Compare affiliation

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1430179200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1767657600000",
    "number": "1457738460",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "5767 W CENTURY BLVD STE 400",
            "city": "LOS ANGELES",
            "state": "CA",
            "postal_code": "900455631"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "23861 MCBEAN PKWY STE E24",
            "city": "VALENCIA",
            "state": "CA",
            "postal_code": "913554457",
            "telephone_number": "661-284-3100"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "1975 Verdugo Blvd Ste A",
            "address_purpose": "LOCATION",
            "city": "LA Canada Flintridge",
            "state": "CA",
            "postal_code": "910113024",
            "country_code": "US",
            "telephone_number": "747-212-3441",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "544 N Glendale Ave Ste B",
            "address_purpose": "LOCATION",
            "city": "Glendale",
            "state": "CA",
            "postal_code": "912063311",
            "country_code": "US",
            "telephone_number": "747-212-3441",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "ANTOSSYAN",
        "first_name": "MERI",
        "name_prefix": "Dr.",
        "credential": "D.O",
        "sole_proprietor": "YES",
        "sex": "F",
        "enumeration_date": "2015-04-28",
        "last_updated": "2026-01-06",
        "certification_date": "2026-01-06",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207Q00000X",
            "taxonomy_group": "",
            "desc": "Family Medicine",
            "state": "CA",
            "license": "20A13819",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "MARY",
            "last_name": "ANTOSSYAN",
            "code": "5",
            "type": "Other Name"
        }
    ]
}

• Takla Rafat Anis, PHARMD
• Antelope Valley Family Optometry, Inc (Valencia Eyecare Optometry)
• Anthony D. Panasci MD Professional Corporation
• Aaron Antonio, OCCUPATIONAL THERAPY
• David Antonyan, O.D.
• Jenefer Anumba
• Akiko Aoki, LMFT
• Maureen Caroline Aoys, DC, MS, PA-C
• Nareeporn Apaipakdi Lutzke
• Fabrizio Apodaca, MS, ATC

• Family Medicine Physician in Valencia, CA
• Providers in Valencia, CA by specialty
• Family Medicine Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jan 6, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; facility enrollments, owners and changes of ownership; Provider of Services certification data; Order and Referring.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.