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
- Entity
- Type 1 · individual
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.Internal Medicine Physician1811239304
- Latricia Amadeo, RNRegistered Nurse1003407115
- Sandhya Ashokkumar, MDEmergency Medicine Physician1457913402
- Oluwaseyi Balasire, M.D.Internal Medicine 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
8% 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 355 among the 49,029 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 Medicare quality score for 2023: 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).
One hospital or facility affiliation
- Eden Emergency Medical Group IncCastro Valley, CA
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
19 emergency medicine physician records list a Castro Valley practice address
They are 19 of the 999 NPPES records with a Castro Valley practice address, and 7,133 emergency medicine physician records in California.
All 19 in Castro Valley → All 7,133 in California → Every provider in Castro Valley →
Other emergency medicine physician records in California
- Cooper Aakhus, MDStanford, CA1194351007
- Pyra Aarden, MDMartinez, CA1417058199
- Neal Aaron, D.O.Encinitas, CA1114283520
- Eric AaserudeWalnut Creek, CA1811491194
- Nader Abas, MDBarstow, CA1346288305
- Michael Abbo, MDNovato, CA1205819042
- Daniel Abbott, MDFullerton, CA1518907864
- Paul-Andre Abboud, M.D.Oakland, CA1710065503
- Mostafa Abdel-Hamid, MDStanford, CA1457918740
- Ashraf Abdel-KerimChino, CA1396961538
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 355. Part D covers Medicare prescriptions only.
What is Alexei Adan's Medicare quality 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), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.