MAI K LAI MD
NPI 1841232717
Emergency Medicine in Pasadena, CA
About Mai K Lai Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MAI K LAI MD (NPI 1841232717) is an individual emergency medicine provider in Pasadena, California, licensed in California (A90320) and active in the NPI registry since June 2006. She is enrolled in Medicare PECOS and is a graduate of Other (2002).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 5
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Mai K Lai Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
9Medicare enrollment records show Mai Lai reassigns Medicare billing to 9 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Los Angeles, CA 90015
- Reassigned Medicare billing, California enrollment
- 169 clinicians in this Medicare group
Culver City, CA 90232
- Reassigned Medicare billing, California enrollment
- 45 clinicians in this Medicare group
Northridge, CA 91325
- Reassigned Medicare billing, California enrollment
- 137 clinicians in this Medicare group
Santa Clarita, CA 91387
- Reassigned Medicare billing, California enrollment
- 684 clinicians in this Medicare group
Calabasas, CA 91302
- Reassigned Medicare billing, California enrollment
- 256 clinicians in this Medicare group
Ridgecrest, CA 93555
- Reassigned Medicare billing, California enrollment
- 143 clinicians in this Medicare group
Indio, CA 92201
- Reassigned Medicare billing, California enrollment
- 55 clinicians in this Medicare group
Fairfield, CA 94533
- Reassigned Medicare billing, California enrollment
- 212 clinicians in this Medicare group
Santa Rosa, CA 95405
- Reassigned Medicare billing, California enrollment
- 42 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 10
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 91105 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Mai Lai's NPI number?
The NPI number for Mai Lai is 1841232717. It was assigned to this individual provider in the NPPES registry on June 12, 2006.
Where is Mai Lai located?
Mai Lai practices at 675 S Arroyo Pkwy Ste 320, Pasadena, CA 91105. The listed phone number is (626) 577-9495.
What is Mai Lai's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Mai Lai enrolled in Medicare?
Yes. Mai Lai is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Mai Lai's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mai Lai reassigns Medicare benefits to 9 organizations: Golden State Emergency Physicians Inc (Los Angeles, CA), Culver Emergency Medical Group (Culver City, CA), Ridgeline Emergency Physicians Medical Group, Inc. (Northridge, CA), Providence Facey Medical Foundation (Santa Clarita, CA), Exer Medical Corporation (Calabasas, CA) and 4 more organizations, listed in the Medicare section above. 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 Mai Lai'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 Mai Lai was last updated on February 24, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.
# Mai K Lai, MD · NPI 1841232717
Emergency Medicine physician in Pasadena, California. Individual provider, active in the CMS NPPES registry since June 12, 2006.
## Identity
- **NPI:** 1841232717 (Entity type: Individual)
- **Enumerated:** June 12, 2006
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** A90320 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 675 S ARROYO PKWY STE 320, Pasadena, CA 91105-3264
- **Phone:** (626) 577-9495
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 9 organizations under Medicare reassignment (form CMS-855R): Golden State Emergency Physicians Inc (NPI 1770886558, Los Angeles, CA); Culver Emergency Medical Group (NPI 1699907923, Culver City, CA); Ridgeline Emergency Physicians Medical Group, Inc. (NPI 1972953230, Northridge, CA); Providence Facey Medical Foundation (NPI 1922651561, Santa Clarita, CA); Exer Medical Corporation (NPI 1588901532, Calabasas, CA); and 4 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2002
## Record status
- **NPPES last updated:** February 24, 2014
- **Other identifiers:** Medicare ID-Type Unspecified WA90320 (CA); Medicare UPIN I34057 (CA); Medicare PIN WA90320A (CA); and 2 more
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Source: [NPI Profile](https://npiprofile.com/npi/1841232717) · Data from the CMS NPPES public registry.