Active NPI
Matthew Tiacharoen, MD
- Emergency Medicine Physician
- Temecula, CA
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Emergency Medicine Physician
- License
- A200917
- Practice address
- 31700 Temecula Pkwy Ste Gme 3
Temecula, CA 92592-5896 - Phone
- (951) 331-2535
- NPI assigned
- Apr 26, 2023
- Sex
- Male
- Sole proprietor
- No
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 |
|---|---|---|---|---|
| Emergency Medicine Physician | 207P00000X | A200917 | CA | Primary |
Addresses
Primary practice location
31700 Temecula Pkwy Ste Gme 3
Temecula, CA 92592-5896
Mailing address
31700 Temecula Pkwy Ste Gme 3
Temecula, CA 92592-5896
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
- Emergency Medicine
- Education
- Michigan State University College of Human Medicine, 2023
- Medicare assignment
- May accept Medicare assignment
Practice addresses (Care Compare)
13584 Hatcher PL
Fontana, CA 92336-2933
5950 Canoga Ave
Suite 300
Woodland Hills, CA 91367-5051
898 N Pacific Coast Hwy
Suite 600
El Segundo, CA 90245-2747
898 N Pacific Coast Hwy 600
El Segundo, CA 90245-2747
Hospital & facility affiliations
- Corona Regional Medical Center
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
- Credentials
- Doctor of Medicine
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| A200917 | CA | MD | Emergency Medicine Physician |
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| Mountain View Urgent Care Group, Inc | Emergency Medicine | Current | Accepting new patients |
| Corona Regional Emergency Medical Associates Inc | Emergency Medicine | Current | Accepting new patients |
| Mountain View Urgent Care Group, Inc | Emergency Medicine | Current | Accepting new patients |
| Mountain View Emergency Physicians Medical Group, Inc. | Emergency Medicine | Current | Accepting new patients |
Locations
800 S Main St
Corona, CA 92882
Phone (909) 625-5411
12442 Limonite Ave
Unit 102
Eastvale, CA 91752
Phone (951) 393-3000
16465 Sierra Lakes Pkwy
Ste 100
Fontana, CA 92336
Phone (909) 434-1150
255 E Bonita Ave
Pomona, CA 91767
Phone (866) 724-4127
999 San Bernardino Rd
Upland, CA 91786
Phone (909) 920-4841
Interoperability endpoints
- https://api.platform.athenahealth.com/18095/brand/2/csg/1/fhir/r4
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.
-
- Emergency Medicine Physician
- Corona, CA
- NPI 1134629298
-
- Emergency Medicine Physician
- Upland, CA
- NPI 1619923653
-
- Emergency Medicine Physician
- Fontana, CA
- NPI 1023306784
-
- Emergency Medicine Physician
- Pomona, CA
- NPI 1801233036
Hospital & facility affiliations 1
Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.
-
- General Acute Care Hospital
- Corona, CA
- NPI 1457347239
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1682467200000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1763424000000",
"number": "1457049595",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "31700 TEMECULA PKWY STE GME 3",
"city": "TEMECULA",
"state": "CA",
"postal_code": "925925896"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "31700 TEMECULA PKWY STE GME 3",
"city": "TEMECULA",
"state": "CA",
"postal_code": "925925896",
"telephone_number": "951-331-2535"
}
],
"practiceLocations": [],
"basic": {
"last_name": "TIACHAROEN",
"first_name": "MATTHEW",
"credential": "MD",
"sole_proprietor": "NO",
"sex": "M",
"enumeration_date": "2023-04-26",
"last_updated": "2025-11-18",
"certification_date": "2025-11-18",
"status": "A"
},
"taxonomies": [
{
"code": "207P00000X",
"taxonomy_group": "",
"desc": "Emergency Medicine",
"state": "CA",
"license": "A200917",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}
Other providers in Temecula, CA
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Nov 18, 2025; 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.