Calvin K. Lei, MD
Internal Medicine Physician · Pleasanton, CA
Calvin K. Lei, MD is an internal medicine physician with a practice address in Pleasanton, California, and NPI 1265432967, issued on Jul 26, 2005. Check the license (California A54048, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Calvin K. Lei
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A54048 CA
Self-reported in NPPES; status is on the state search - Practice location
- 5565 W Las Positas Blvd Ste 260, Pleasanton, CA 94588
- Phone
- (925) 416-5470
- Enumerated
- Jul 26, 2005
- Record last updated
- Aug 11, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicaid ID
- 00A540480 CA
- Medicare enrollment
- Enrolled (PECOS I20080707000676); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 5565 W Las Positas Blvd Ste 260
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mary Estakhri, MDSurgery Physician1467579763
- Kevin Izquierdo, MDSurgery Physician1922361641
- Samuel Liu, MDSurgery Physician1790863884
Verify Calvin K. Lei in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A54048Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
85% more Medicare Part D claims than the average internal medicine physician in 2024
5,879 Medicare Part D claims for 684 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 235 claims were for opioids.
Most prescribed
- Atorvastatin Calcium349 claims
- Amlodipine Besylate241 claims
- Losartan Potassium216 claims
- Zolpidem Tartrate188 claims
- Levothyroxine Sodium182 claims
- Alprazolam152 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.
Industry payments in 2024: $124.49
1 payment: food and beverage; the largest payer was Boehringer Ingelheim Pharmaceuticals, Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- University Healthcare AllianceMenlo Park, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
57 internal medicine physician records list a practice address in Pleasanton
They are 57 of the 2,213 NPPES records with a practice address in Pleasanton, and 17,696 internal medicine physician records in California.
All 57 in Pleasanton → All 17,696 in California → Every provider in Pleasanton →
Other internal medicine physician records in California
- Jacob Aaron, MDSan Francisco, CA1407202518
- Alistair Aaronson, MDStanford, CA1457628760
- Jose Abad., MDSacramento, CA1144607219
- Donna Abare, MDOakland, CA1386722155
- Marce AbareScotts Valley, CA1457744708
- Samuel Abarte, M.D.Chula Vista, CA1578535498
- Alexander Abary, MDLong Beach, CA1104995919
- Luba Abascal, MDSan Francisco, CA1023180874
- Michael Abate, MDSacramento, CA1548248131
- Wali Abawi, D.O.Joshua Tree, CA1104362268
Common questions
What is Calvin K. Lei, MD's NPI number?
Calvin K. Lei, MD's National Provider Identifier (NPI) is 1265432967, issued on Jul 26, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Calvin K. Lei, MD located?
The NPPES record lists a practice address at 5565 W Las Positas Blvd Ste 260, Pleasanton, CA, 94588. Phone: (925) 416-5470. Providers update this record themselves, so call before visiting.
How can I verify Calvin K. Lei, MD's license?
NPPES lists California license number A54048, 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 Calvin K. Lei, MD prescribe under Medicare Part D?
In 2024, Calvin K. Lei, MD had 5,879 Medicare Part D claims for 684 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.