Individual provider Active NPI

Hmayak Hamo Matossian, M.D.

  • Anesthesiology Physician
  • Arcadia, CA
National Provider Identifier
1801810536
Registry record updated Jul 8, 2007
On this page

Key facts

NPPES NPI Registry
Primary specialty
Anesthesiology PhysicianTaxonomy code 207L00000X
License
A64000 Issued in CA
Practice address
300 W Huntington Dr
Arcadia, CA 91007-3402
Phone
(626) 445-4441
Fax
(626) 821-6955
NPI assigned
Jul 26, 2006
Sex
Male
Sole proprietor
Yes

NPPES NPI Registry

Updated by the provider on Jul 8, 2007

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Anesthesiology Physician 207L00000X A64000 CA Primary

Addresses

Primary practice location

300 W Huntington Dr
Arcadia, CA 91007-3402

Mailing address

225 S Lake Ave
535
Pasadena, CA 91101-3005
Phone (626) 795-6596

Other identifiers 2

IdentifierTypeStateIssuer
00A640001MedicaidCA
00A640000OtherCABLUE SHIELD

Medicare participation

Medicare enrollment files
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

Enrollment IDStateProvider typePAC IDDetails
I20050531001066 CA Practitioner - AnesthesiologyPractitioner - Family Practice 1557303534 Reassigns benefits to 3 organizations

Care Compare profile

Medicare Care Compare
Specialty
Anesthesiology
Education
Loma Linda University School of Medicine, 1995
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Usc Care Medical Group IncGroup PAC ID 0446157747, 1,378 clinicians

Practice addresses (Care Compare)

1500 San Pablo St
Los Angeles, CA 90033-5313
Phone (323) 442-8444

1516 San Pablo St
Los Angeles, CA 90033-5313
Phone (800) 872-2273

1520 San Pablo St
Los Angeles, CA 90033-5310
Phone (800) 872-2273

1520 San Pablo St 1St Floor N
Los Angeles, CA 90033-5310
Phone (800) 872-2273

300 W Hungtington Dr
Arcadia, CA 91007-3402
Phone (626) 898-8000

Hospital & facility affiliations

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Medicine

Practice roles

OrganizationSpecialtyStatusNew patients
Usc Care Medical Group, Inc CurrentSince Jun 12, 2025 Accepting new patients
Tip Top Anesthesia Group Inc CurrentSince Apr 18, 2025 Accepting new patients
Usc Care Medical Group, Inc Anesthesiology CurrentSince Jun 12, 2025 Accepting new patients
Pacific Valley Medical Group Anesthesiology CurrentSince Jan 1, 2001 Accepting new patients

Locations

300 W Huntington Dr
Arcadia, CA 91007
Phone (626) 445-4441

420 34th St
Bakersfield, CA 93301
Phone (661) 324-4647

1001 Tower Way
Ste 150
Bakersfield, CA 93309
Phone (310) 779-3025

50 N La Cienega Blvd
Ste 203
Beverly Hills, CA 90211
Phone (323) 988-0896

15503 Ventura Blvd
Ste 200
Encino, CA 91436
Phone (818) 788-7288

1520 San Pablo St
Los Angeles, CA 90033
Phone (323) 442-5849

225 S Lake Ave
Ste 535
Pasadena, CA 91101

797 S Fair Oaks Ave
Pasadena, CA 91105
Phone (626) 535-2434

333 S Arroyo Pkwy
Fl 3
Pasadena, CA 91105
Phone (626) 440-9161

Organizations & group practices 4

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

Hospital & facility affiliations 2

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

NPI Registry JSON

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

{
    "created_epoch": "1153872000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1183852800000",
    "number": "1801810536",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "225 S LAKE AVE",
            "address_2": "535",
            "city": "PASADENA",
            "state": "CA",
            "postal_code": "911013005",
            "telephone_number": "626-795-6596",
            "fax_number": "626-795-8247"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "300 W HUNTINGTON DR",
            "city": "ARCADIA",
            "state": "CA",
            "postal_code": "910073402",
            "telephone_number": "626-445-4441",
            "fax_number": "626-821-6955"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "MATOSSIAN",
        "first_name": "HMAYAK",
        "middle_name": "HAMO",
        "credential": "M.D.",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2006-07-26",
        "last_updated": "2007-07-08",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207L00000X",
            "taxonomy_group": "",
            "desc": "Anesthesiology",
            "state": "CA",
            "license": "A64000",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "00A640001",
            "state": "CA"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "BLUE SHIELD",
            "identifier": "00A640000",
            "state": "CA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

Other providers in Arcadia, CA

Sources for this page

Verify at the official NPI Registry.