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MATTHEW TIACHAROEN MD
NPI 1457049595
Emergency Medicine in Temecula, CA

Active since April 26, 2023PECOS Enrolled
31700 TEMECULA PKWY STE GME 3, TEMECULA, CA 92592(951) 331-2535 Get Directions Write a Review

NPPES record last updated: November 18, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Matthew Tiacharoen Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MATTHEW TIACHAROEN MD (NPI 1457049595) is an individual emergency medicine provider in Temecula, California, licensed in California (A200917) and active in the NPI registry since April 2023. He is enrolled in Medicare PECOS and is a graduate of Michigan State University College Of Human Medicine (2023).

NPPES Registry Identity

NPI1457049595
Entity TypeIndividualMale
Primary Taxonomy207P00000X
Provider Legal NameMATTHEW TIACHAROENCredential: MD
Location Address31700 TEMECULA PKWY STE GME 3Temecula, CA 92592-5896
Mailing Address31700 Temecula Pkwy Ste Gme 3Temecula, CA 92592-5896
Phone(951) 331-2535
Sole ProprietorNo
Medical School CMSMichigan State University College Of Human MedicineGraduated 2023
Enumeration DateApril 26, 2023
Last NPPES UpdateNovember 18, 2025
NPPES CertifiedNovember 18, 2025
✔ NPI 1457049595 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
License✔ Licensed in CA · A200917
Definition
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
31700 TEMECULA PKWY STE GME 3, Temecula, CA 92592
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Matthew Tiacharoen Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID6507355005
PECOS Enrollment IDI20251026000225
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

3

Medicare enrollment records show Matthew Tiacharoen reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Corona Regional Emergency Medical Associates Inc
38 mi
Emergency Medicine
800 S MAIN ST
Corona, CA 92882
  • Reassigned Medicare billing, California enrollment
  • 114 clinicians in this Medicare group
NPI 1134629298 (310) 321-0143
Mountain View Urgent Care Group, Inc
49 mi
Emergency Medicine
16465 SIERRA LAKES PKWY, SUITE 100
Fontana, CA 92336
  • Reassigned Medicare billing, California enrollment
  • 95 clinicians in this Medicare group
NPI 1023306784 (909) 434-1150
Mountain View Emergency Physicians Medical Group, Inc.
53 mi
Emergency Medicine
999 SAN BERNARDINO RD
Upland, CA 91786
  • Reassigned Medicare billing, California enrollment
  • 103 clinicians in this Medicare group
NPI 1619923653 (909) 985-2811

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92592 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$91.88 typical visit price
range $59.60 – $179.42
Typical copayment $22.97 (range $14.90 – $44.85)
Most-billed visit code 99203
Established Patient
$104.64 typical visit price
range $19.37 – $146.42
Typical copayment $26.16 (range $4.84 – $36.60)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 17

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

PHILINE JOHANNA ENDRES-SHAFER MD
Emergency Medicine
31700 TEMECULA PKWY STE GME 3
TEMECULA, CA 92592
Riverside County (951) 331-2535
REBECCA CAITLYN CHAVEZ MD
Student in an Organized Health Care Education/Training Program
31700 TEMECULA PKWY STE GME 3
TEMECULA, CA 92592
Riverside County (951) 331-2535
GRANT MCCULLEN SCHUMAKER MD
Emergency Medicine
31700 TEMECULA PKWY STE GME 3
TEMECULA, CA 92592
Riverside County (951) 331-2535
DR. MALAAK FAYEZ HAMZEH MD
Emergency Medicine
31700 TEMECULA PKWY STE GME 3
TEMECULA, CA 92592
Riverside County (951) 331-2535
SAMANTHA YIN DO
Student in an Organized Health Care Education/Training Program
31700 TEMECULA PKWY STE GME 3
TEMECULA, CA 92592
Riverside County (951) 331-2535
DR. TAYLOR ROUTE DO
Student in an Organized Health Care Education/Training Program
31700 TEMECULA PKWY STE GME 3
TEMECULA, CA 92592
Riverside County (951) 331-2535
BARBARA WILLIAMS MD
Student in an Organized Health Care Education/Training Program
31700 TEMECULA PKWY STE GME 3
TEMECULA, CA 92592
Riverside County (951) 331-2535
DELLVIN NGUONLY DO
Student in an Organized Health Care Education/Training Program
31700 TEMECULA PKWY STE GME 3
TEMECULA, CA 92592
Riverside County (951) 331-2535

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Matthew Tiacharoen's NPI number?

The NPI number for Matthew Tiacharoen is 1457049595. It was assigned to this individual provider in the NPPES registry on April 26, 2023.

Where is Matthew Tiacharoen located?

Matthew Tiacharoen practices at 31700 Temecula Pkwy Ste Gme 3, Temecula, CA 92592. The listed phone number is (951) 331-2535.

What is Matthew Tiacharoen's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Is Matthew Tiacharoen enrolled in Medicare?

Yes. Matthew Tiacharoen is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Matthew Tiacharoen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Matthew Tiacharoen reassigns Medicare benefits to 3 organizations: Corona Regional Emergency Medical Associates Inc (Corona, CA), Mountain View Urgent Care Group, Inc (Fontana, CA) and Mountain View Emergency Physicians Medical Group, Inc. (Upland, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Matthew Tiacharoen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Matthew Tiacharoen was last updated on November 18, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.