Mai K. Lai, MD
Emergency Medicine Physician · Pasadena, CA
Mai K. Lai, MD is an emergency medicine physician with a practice address in Pasadena, California, and NPI 1841232717, issued on Jun 12, 2006. Check the license (California A90320, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mai K. Lai
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- A90320 CA
Self-reported in NPPES; status is on the state search - Practice location
- 675 S Arroyo Pkwy Ste 320, Pasadena, CA 91105
- Phone
- (626) 577-9495
- Enumerated
- Jun 12, 2006
- Record last updated
- Feb 24, 2014 (not updated in 12 years: call before relying on the address or phone)
- Medicaid ID
- 00A903200 CA
- Medicare enrollment
- Enrolled (PECOS I20050725001063); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Verify Mai K. Lai in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A90320Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
30% more Medicare Part D claims than the average emergency medicine physician in 2024
294 Medicare Part D claims for 194 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims.
Most prescribed
- Amoxicillin-Clavulanate Potass32 claims
- Albuterol Sulfate Hfa23 claims
- Azithromycin21 claims
- Nitrofurantoin Mono-Macro20 claims
- Cephalexin16 claims
- Prednisone13 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
2 hospitals and group practices
- Exer Medical CorporationTorrance, CA
- Ridgecrest Regional HospitalRidgecrest, CA · Critical Access Hospitals
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov).
Mai K. Lai among 7,751 emergency medicine physician records in California
Mai K. Lai, MD is one of 7,751 emergency medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 4% of them.
- NPI issued2006 · 4% of these records are older, 60% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2002 · median 2011 among the 4,560 with a school on file
- Record last updated2014 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Emergency Medicine Physician providers in California
There are 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Pasadena → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Betty Ahn, MDPasadena, CA 911051902862089
- Roy Antelyes, M.D.Pasadena, CA 911051275648610
- Timothy Ballard, M.D.Pasadena, CA 911051710090816
- Bradley Gerberich, M.D.Pasadena, CA 911051790728277
- William Gregory, MDPasadena, CA 911051659337350
- Stanley Kalter, MDPasadena, CA 911051518071125
- Taline Kilaghbian, M.D.Pasadena, CA 911051699889212
- Brandon Lew, D.O.Pasadena, CA 911051851405203
Common questions
What is Mai K. Lai, MD's NPI number?
Mai K. Lai, MD's National Provider Identifier (NPI) is 1841232717, issued on Jun 12, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mai K. Lai, MD located?
The NPPES record lists a practice address at 675 S Arroyo Pkwy Ste 320, Pasadena, CA, 91105. Phone: (626) 577-9495. Providers update this record themselves, so call before visiting.
How can I verify Mai K. Lai, MD's license?
NPPES lists California license number A90320, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mai K. Lai, MD prescribe under Medicare Part D?
In 2024, Mai K. Lai, MD had 294 Medicare Part D claims for 194 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.