Alexei Adan
Emergency Medicine Physician · Castro Valley, CA
Alexei Adan is an emergency medicine physician with a practice address in Castro Valley, California, and NPI 1679968978, issued on Apr 2, 2015. Check the license (California A161408, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Alexei Adan
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- A161408 CA
Self-reported in NPPES; status is on the state search - Practice location
- 20103 Lake Chabot RD, Castro Valley, CA 94546
- Phone
- (510) 727-3015
- Enumerated
- Apr 2, 2015
- Record last updated
- Feb 26, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20190715000417); accepts Medicare assignment
- Medical or professional school
- Perelman School Of Med At The University Of Pennsylvania, 2015
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 20103 Lake Chabot RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Maria Ait Rais, M.D.Hospitalist Physician1811239304
- Latricia Amadeo, RNRegistered Nurse1003407115
- Sandhya Ashokkumar, MDCritical Care Medicine (Internal Medicine) Physician1457913402
- Oluwaseyi Balasire, M.D.Hospitalist Physician1003235243
- Rachna Bali, DOHospitalist Physician1346541554
- Eric Bellfort, PAPhysician Assistant1073504403
Verify Alexei Adan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A161408Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
70% more Medicare Part D claims than the average emergency medicine physician in 2024
385 Medicare Part D claims for 206 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 18 claims were for opioids.
Most prescribed
- Naproxen57 claims
- Cephalexin41 claims
- Doxycycline Hyclate31 claims
- Ondansetron Odt25 claims
- Cefpodoxime Proxetil24 claims
- Famotidine19 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 100 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Eden Emergency Medical Group IncCastro Valley, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Alexei Adan among 7,751 emergency medicine physician records in California
Alexei Adan 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 2015, is newer than 72% of them.
- NPI issued2015 · 72% of these records are older, 25% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2015 · median 2011 among the 4,560 with a school on file
- Record last updated2021 · 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).
20 emergency medicine physician records list a practice address in Castro Valley
They are 20 of the 999 NPPES records with a practice address in Castro Valley, and 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Castro Valley → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Winnie Chan, MDCastro Valley, CA 945461538521281
- Merrill Chandler, MDCastro Valley, CA 945461508847237
- Nathalie Coeller, MDCastro Valley, CA 945461265607402
- Ralph Damato, MDCastro Valley, CA 945461225014673
- Rochelle Eggleston Philapil, MDCastro Valley, CA 945461265423610
- Alan Gottlieb, MDCastro Valley, CA 945461306837521
- Peter Joseph, MDCastro Valley, CA 945461396729158
- Tatiana Mamantov, MDCastro Valley, CA 945461629069059
Common questions
What is Alexei Adan's NPI number?
Alexei Adan's National Provider Identifier (NPI) is 1679968978, issued on Apr 2, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Alexei Adan located?
The NPPES record lists a practice address at 20103 Lake Chabot RD, Castro Valley, CA, 94546. Phone: (510) 727-3015. Providers update this record themselves, so call before visiting.
How can I verify Alexei Adan's license?
NPPES lists California license number A161408, 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 Alexei Adan prescribe under Medicare Part D?
In 2024, Alexei Adan had 385 Medicare Part D claims for 206 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Alexei Adan's MIPS final score?
The 2023 MIPS final score is 100 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.