Active NPI
Maria Virginia Garcia Sioson-Ayala, MD
- Family Medicine Physician
- El Monte, CA
National Provider Identifier
1922137173
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Family Medicine Physician
- License
- A105436
- 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
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 1
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| 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
Enrollment records 1
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
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
- Pacific Sun Hospice
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
- Credentials
- Doctor of Medicine
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| Altamed Health Services Corporation | Past | Accepting new patients | |
| Memorial Medical Group Inc | Past | Accepting new patients |
Networks
- BSC 65 PLUS INDIVIDUAL MAPD
Interoperability endpoints
- 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.
-
- Internal Medicine Physician
- Los Angeles, CA
- NPI 1659312593
-
- Community/Retail Pharmacy
- Huntington Beach, CA
- NPI 1306726419
-
- Durable Medical Equipment & Medical Supplies
- Phoenix, AZ
- NPI 1255523643
Hospital & facility affiliations 2
Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.
-
- Home Health Agency
- Arcadia, CA
- NPI 1285728717
-
- Community Based Hospice Care Agency
- Arcadia, CA
- NPI 1922526003
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
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Feb 21, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; 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.