MAYFLOWER MEDICAL GROUP, INC.
NPI 1003188160
Internal Medicine in West Covina, CA
About Mayflower Medical Group, Inc. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MAYFLOWER MEDICAL GROUP, INC. (NPI 1003188160) is a healthcare organization registered as an internal medicine in West Covina, California and active in the NPI registry since February 2012. The organization holds 3 active CLIA laboratory certificates, maintains 2 additional practice locations, and lists Erica Carbajal, Site Manager, as its authorized official.
NPPES Registry Identity
Specialties & Licenses 2
Other Names 1
Secondary Practice Locations 2
Other Identifiers 1
Group Practice 1
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Mayflower Medical Group, Inc. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
9Medicare enrollment records show 9 clinicians reassign Medicare billing to Mayflower Medical Group, Inc., which bills Medicare for the services they deliver. Of these, 1 practice at this address and 7 within 10 miles. They are listed nearest first.
Clinicians, nearest first (9)
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
CLIA Laboratory Certificates CMS CLIA 3
Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.
Certificate of Waiver 05D2041490
Mayflower Medical Group Inc · West Covina, CACertificate of Waiver 05D2137082
Mayflower Medical Group, Inc · West Covina, CACertificate of Waiver 05D2220550
Mayflower Medical Group, Inc. · Anaheim, CAFrequently 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 Mayflower Medical Group, Inc.'s NPI number?
The NPI number for Mayflower Medical Group, Inc. is 1003188160. It was assigned to this organization in the NPPES registry on February 6, 2012.
Where is Mayflower Medical Group, Inc. located?
Mayflower Medical Group, Inc. is located at 140 N Orange Ave. Suite 100, West Covina, CA 91790. The listed phone number is (626) 800-1200.
What is Mayflower Medical Group, Inc.'s specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Mayflower Medical Group, Inc. enrolled in Medicare?
Yes. Mayflower Medical Group, Inc. is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Mayflower Medical Group, Inc.?
According to the CMS Revalidation Reassignment List (October 2026 release), 9 clinicians in 4 Medicare specialties reassign their Medicare billing to Mayflower Medical Group, Inc.. A 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 the clinician's services. The largest specialties are Internal Medicine (4), Family Practice (3) and General Practice (1). Of these, 1 practice at this address and 7 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Does Mayflower Medical Group, Inc. hold CLIA laboratory certificates?
Yes. 3 active CLIA laboratory certificates are associated with this NPI under the federal Clinical Laboratory Improvement Amendments program. The certificates are listed in the CLIA Laboratory Certificates section above.
When was this NPI record last updated?
The NPPES record for Mayflower Medical Group, Inc. was last updated on April 23, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.
# Mayflower Medical Group, Inc. · NPI 1003188160
Internal Medicine organization in West Covina, California. Organization record, active in the CMS NPPES registry since February 6, 2012.
## Identity
- **NPI:** 1003188160 (Entity type: Organization)
- **Enumerated:** February 6, 2012
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **Also known as:** Mayflower Medical Group, Inc. (Doing Business As)
- **Organization subpart:** No
- **Authorized official:** Erica Carbajal, SITE MANAGER
## Practice location
- **Address:** 140 N ORANGE AVE., SUITE 100, West Covina, CA 91790-2032
- **Phone:** (626) 800-1200 · **Fax:** (626) 962-2471
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 9 clinicians in 4 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Internal Medicine (4), Family Practice (3), General Practice (1); 1 practice at this address and 7 within 10 miles · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** April 23, 2026
- **Other identifiers:** Medicaid 6409040 (CA)
- **CLIA laboratory certificates:** 3 on file
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Source: [NPI Profile](https://npiprofile.com/npi/1003188160) · Data from the CMS NPPES public registry.