ANN MAI MD
NPI 1972826782
Internal Medicine in Irvine, CA
About Ann Mai Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ANN MAI MD (NPI 1972826782) is a healthcare organization registered as an internal medicine in Irvine, California and active in the NPI registry since March 2010. The organization maintains a secondary practice location in Newport Beach and lists Ann Mai, Physician, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Secondary Practice Location 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)
Ann Mai Md 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 Ann Mai MD, 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 Ann L Mai, MD, A Professional Medical Corporation's NPI number?
The NPI number for Ann L Mai, MD, A Professional Medical Corporation is 1972826782. It was assigned to this organization in the NPPES registry on March 8, 2010. The provider is doing business as Ann Mai MD.
Where is Ann L Mai, MD, A Professional Medical Corporation located?
Ann L Mai, MD, A Professional Medical Corporation is located at 4950 Barranca Pkwy Suite 207, Irvine, CA 92604. The listed phone number is (949) 262-9700.
What is Ann L Mai, MD, A Professional Medical Corporation's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Ann L Mai, MD, A Professional Medical Corporation enrolled in Medicare?
Yes. Ann L Mai, MD, A Professional Medical Corporation is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Ann L Mai, MD, A Professional Medical Corporation?
According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Internal Medicine) reassigns their Medicare billing to Ann L Mai, MD, 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. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
When was this NPI record last updated?
The NPPES record for Ann L Mai, MD, A Professional Medical Corporation was last updated on August 20, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years 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.
# Ann Mai Md · NPI 1972826782
Internal Medicine organization in Irvine, California. Organization record, active in the CMS NPPES registry since March 8, 2010.
## Identity
- **NPI:** 1972826782 (Entity type: Organization)
- **Enumerated:** March 8, 2010
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **Legal business name:** Ann L Mai, Md, A Professional Medical Corporation
- **Organization subpart:** No
- **Authorized official:** Ann Mai, PHYSICIAN
## Practice location
- **Address:** 4950 BARRANCA PKWY, SUITE 207, Irvine, CA 92604-4671
- **Phone:** (949) 262-9700 · **Fax:** (949) 262-0700
## 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:** August 20, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1972826782) · Data from the CMS NPPES public registry.