Individual provider Active NPI

Maria Virginia Garcia Sioson-Ayala, MD

  • Family Medicine Physician
  • El Monte, CA
National Provider Identifier
1922137173
Registry record updated Feb 21, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Family Medicine PhysicianTaxonomy code 207Q00000X
License
A105436 Issued in CA
Practice address
10418 Valley Blvd
El Monte, CA 91731-3600
Phone
(626) 453-8466
Fax
(626) 453-8465
NPI assigned
Mar 5, 2007
Sex
Female
Sole proprietor
Yes

NPPES NPI Registry

Updated by the provider on Feb 21, 2026

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Family Medicine Physician 207Q00000X A105436 CA Primary

Addresses

Primary practice location

10418 Valley Blvd
El Monte, CA 91731-3600

Mailing address

PO Box 35380
Las Vegas, NV 89133-5380
Phone (702) 579-3203

Other practice location 1

3144 Santa Anita Ave
El Monte, CA 91733-1316
Phone (626) 401-4147

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
I20100724000135 CA Practitioner - Family Practice 3476685595 Reassigns benefits to 1 organization

Care Compare profile

Medicare Care Compare
Specialty
Family Practice
Education
Other, 1997
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Telehealth
Offers telehealth services
Group practices
Healthcare Partners Affiliates Medical GroupGroup PAC ID 7315842002, 775 clinicians

Practice addresses (Care Compare)

3144 Santa Anita Ave
El Monte, CA 91733-1316
Phone (626) 444-0333

Hospital & facility affiliations

  • Family Home Health Agency, LLC Home health agency, Glendora, CA, CCN 058451
  • Pacific Sun Hospice Hospice, Arcadia, CA, CCN A11617

National Provider Directory

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

Practice roles

OrganizationSpecialtyStatusNew patients
Altamed Health Services Corporation PastSince Mar 15, 2010 Accepting new patients
Memorial Medical Group Inc Past Accepting new patients

Networks

  • BSC 65 PLUS INDIVIDUAL MAPD

Interoperability endpoints

  • Direct secure messaging: msiosonayala206976@westdirect.optum.com

Organizations & group practices 3

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": "1173052800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1771632000000",
    "number": "1922137173",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 35380",
            "city": "LAS VEGAS",
            "state": "NV",
            "postal_code": "891335380",
            "telephone_number": "702-579-3203"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "10418 VALLEY BLVD",
            "city": "EL MONTE",
            "state": "CA",
            "postal_code": "917313600",
            "telephone_number": "626-453-8466",
            "fax_number": "626-453-8465"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "3144 Santa Anita Ave",
            "address_purpose": "LOCATION",
            "city": "El Monte",
            "state": "CA",
            "postal_code": "917331316",
            "country_code": "US",
            "telephone_number": "626-401-4147",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "SIOSON-AYALA",
        "first_name": "MARIA VIRGINIA",
        "middle_name": "GARCIA",
        "credential": "MD",
        "sole_proprietor": "YES",
        "sex": "F",
        "enumeration_date": "2007-03-05",
        "last_updated": "2026-02-21",
        "certification_date": "2026-02-21",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207Q00000X",
            "taxonomy_group": "",
            "desc": "Family Medicine",
            "state": "CA",
            "license": "A105436",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in El Monte, CA

Sources for this page

Verify at the official NPI Registry.