Alfort Briones Santos, M.D.,R.N
Hospitalist Physician · Lafayette, CA
Alfort Briones Santos, M.D.,R.N is a hospitalist physician with a practice address in Lafayette, California, and NPI 1376731505, issued on Oct 12, 2007. Check the license (California A105031, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Alfort Briones Santos
- Credential
- M.D.,R.N
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- A105031 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3687 Mt Diablo Blvd Ste 200, Lafayette, CA 94549
- Phone
- (916) 854-6975
- Enumerated
- Oct 12, 2007
- Record last updated
- Jul 21, 2022
- Medicare enrollment
- Enrolled (PECOS I20090512000478); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 3,099 in California → Look up another NPI →
Also registered at 3687 Mt Diablo Blvd Ste 200
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Alfort Briones Santos in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A105031Check 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% fewer Medicare Part D claims than the average hospitalist physician in 2024
77 Medicare Part D claims, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D.
Most prescribed
- Hydralazine Hcl12 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: $121.83
1 payment: food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 7,324 providers of this specialty with any payment received $494.84 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
- Sutter Bay Medical FoundationFremont, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Alfort Briones Santos among 3,099 hospitalist physician records in California
Alfort Briones Santos, M.D.,R.N is one of 3,099 hospitalist physician records with a practice address in California. 90% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 27% of them.
- NPI issued2007 · 27% of these records are older, 66% newer
- In a Medicare fileYes · 90% of these records are
- In the CMS Doctors and Clinicians fileYes · 81% of these records are
- Graduated1998 · median 2010 among the 2,505 with a school on file
- Record last updated2022 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospitalist Physician providers in California
There are 3,099 hospitalist physician records in California.
All 3,099 in California → Every provider in Lafayette → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Maria Ait Rais, M.D.Castro Valley, CA 945461811239304
- Oluwaseyi Balasire, M.D.Castro Valley, CA 945461003235243
- Rachna Bali, DOCastro Valley, CA 945461346541554
- Mariam Beshai, MDCastro Valley, CA 945461447839956
- Prakriti BistaCastro Valley, CA 945461336577527
- Priyanka Jayan, M.D.Castro Valley, CA 945461568861383
- Travis Lee, D.O.Castro Valley, CA 945461386098309
- Rebecca Lekim, D.OCastro Valley, CA 945461780079509
Common questions
What is Alfort Briones Santos, M.D.,R.N's NPI number?
Alfort Briones Santos, M.D.,R.N's National Provider Identifier (NPI) is 1376731505, issued on Oct 12, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Alfort Briones Santos, M.D.,R.N located?
The NPPES record lists a practice address at 3687 Mt Diablo Blvd Ste 200, Lafayette, CA, 94549. Phone: (916) 854-6975. Providers update this record themselves, so call before visiting.
How can I verify Alfort Briones Santos, M.D.,R.N's license?
NPPES lists California license number A105031, 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 Alfort Briones Santos, M.D.,R.N prescribe under Medicare Part D?
In 2024, Alfort Briones Santos, M.D.,R.N had 77 Medicare Part D claims; the average among hospitalist physician prescribers was 521. 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.