AMG, A PROFESSIONAL MEDICAL CORPORATION
NPI 1558306266
Internal Medicine in Alhambra, CA
About Amg, A Professional Medical Corporation NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
AMG, A PROFESSIONAL MEDICAL CORPORATION (NPI 1558306266) is a healthcare organization registered as an internal medicine in Alhambra, California and active in the NPI registry since June 2006. The organization holds 4 active CLIA laboratory certificates, maintains 10 additional practice locations, and lists Thomas S. Lam, Director, as its authorized official.
NPPES Registry Identity
Specialties & Licenses 3
Secondary Practice Locations 10
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)
Amg, A Professional Medical Corporation is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
48Medicare enrollment records show 48 clinicians reassign Medicare billing to Amg, A Professional Medical Corporation, which bills Medicare for the services they deliver. Of these, 1 practice at this address and 22 within 10 miles. Listed here are the 20 practicing nearest to this location.
Clinicians by Medicare Specialty 10
Nearest to this location (20)
See all 48Source: 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 4
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 05D0863367
Amg, A Professional Medical Corp · Alhambra, CACertificate of Waiver 05D2313826
Amg A Professional Medical Corporation · Riverside, CACertificate of Waiver 05D2345802
Amg A Professional Medical Corporation · Westminster, CACertificate of Waiver 05D2304770
Amg A Professional Medical Corporation Dba Astrana Care · Whittier, 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 Amg, A Professional Medical Corporation's NPI number?
The NPI number for Amg, A Professional Medical Corporation is 1558306266. It was assigned to this organization in the NPPES registry on June 17, 2006.
Where is Amg, A Professional Medical Corporation located?
Amg, A Professional Medical Corporation is located at 1658 W Valley Blvd Ste 120, Alhambra, CA 91803. The listed phone number is (626) 282-0282.
What is Amg, A Professional Medical Corporation's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Amg, A Professional Medical Corporation enrolled in Medicare?
Yes. Amg, A Professional Medical Corporation is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Amg, A Professional Medical Corporation?
According to the CMS Revalidation Reassignment List (October 2026 release), 48 clinicians in 10 Medicare specialties reassign their Medicare billing to Amg, A Professional Medical Corporation. 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 Nurse Practitioner (18), Internal Medicine (10) and Family Practice (5). Of these, 1 practice at this address and 22 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Does Amg, A Professional Medical Corporation hold CLIA laboratory certificates?
Yes. 4 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 Amg, A Professional Medical Corporation 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.
# Amg, A Professional Medical Corporation · NPI 1558306266
Internal Medicine organization in Alhambra, California. Organization record, active in the CMS NPPES registry since June 17, 2006.
## Identity
- **NPI:** 1558306266 (Entity type: Organization)
- **Enumerated:** June 17, 2006
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **Organization subpart:** No
- **Authorized official:** Thomas Lam, DIRECTOR
## Practice location
- **Address:** 1658 W VALLEY BLVD STE 120, Alhambra, CA 91803-2370
- **Phone:** (626) 282-0282 · **Fax:** (626) 282-0939
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 48 clinicians in 10 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Nurse Practitioner (18), Internal Medicine (10), Family Practice (5); 1 practice at this address and 22 within 10 miles; [full list](https://npiprofile.com/npi/1558306266/clinicians) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** November 18, 2025
- **Other identifiers:** Medicaid GR0054980 (CA)
- **CLIA laboratory certificates:** 4 on file
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Source: [NPI Profile](https://npiprofile.com/npi/1558306266) · Data from the CMS NPPES public registry.