MICHAEL C LAM MD INC
NPI 1730230251
Internal Medicine in Corona, CA
About Michael C Lam Md Inc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MICHAEL C LAM MD INC (NPI 1730230251) is a healthcare organization registered as an internal medicine in Corona, California and active in the NPI registry since January 2007. The organization lists Michael C Lam, Owner, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
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)
Michael C Lam Md Inc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
Medicare enrollment records show 1 clinician reassigns Medicare billing to Michael C Lam MD Inc, which bills Medicare for the services this clinician delivers.
Clinician (1)
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
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 Michael C Lam MD Inc's NPI number?
The NPI number for Michael C Lam MD Inc is 1730230251. It was assigned to this organization in the NPPES registry on January 12, 2007.
Where is Michael C Lam MD Inc located?
Michael C Lam MD Inc is located at 720 Magnolia Ave Ste B2, Corona, CA 92879. The listed phone number is (714) 454-1757.
What is Michael C Lam MD Inc's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Michael C Lam MD Inc enrolled in Medicare?
Yes. Michael C Lam MD Inc is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Michael C Lam MD Inc?
According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Internal Medicine) reassigns their Medicare billing to Michael C Lam MD 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. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
When was this NPI record last updated?
The NPPES record for Michael C Lam MD Inc was last updated on November 17, 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.
# Michael C Lam Md Inc · NPI 1730230251
Internal Medicine organization in Corona, California. Organization record, active in the CMS NPPES registry since January 12, 2007.
## Identity
- **NPI:** 1730230251 (Entity type: Organization)
- **Enumerated:** January 12, 2007
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **Organization subpart:** No
- **Authorized official:** Michael Lam, OWNER
## Practice location
- **Address:** 720 MAGNOLIA AVE STE B2, Corona, CA 92879-3119
- **Phone:** (714) 454-1757
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 1 clinician (Internal Medicine) reassigns Medicare billing to this organization (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** November 17, 2025
- **Other identifiers:** Other A62691 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1730230251) · Data from the CMS NPPES public registry.