Dennis Keith Alfaro, M.D.
Emergency Medicine Physician · Pleasanton, CA
Dennis Keith Alfaro, M.D. is an emergency medicine physician with a practice address in Pleasanton, California, and NPI 1407847718, issued on Nov 4, 2005. Check the license (California G67215, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Dennis Keith Alfaro
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- G67215 CA
Self-reported in NPPES; status is on the state search - Practice location
- 5555 W Las Positas Blvd, Pleasanton, CA 94588
- Phone
- (209) 342-2300
- Enumerated
- Nov 4, 2005
- Record last updated
- Jul 14, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (209) 524-4240
- Medicaid ID
- 00G672150 CA
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 5555 W Las Positas Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ashley Altman, MDDiagnostic Radiology Physician1649697947
- Joshua AshfordEmergency Registered Nurse1972458941
- Abinav Baweja, MDMedical Oncology Physician1770961575
- Brooke BettsPharmacist1962178491
- Myrna Castelazo, M.D.Diagnostic Radiology Physician1407290513
- Ryan Cates, PA-CPhysician Assistant1053782920
Verify Dennis Keith Alfaro in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G67215Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.5 times the Medicare Part D claims of the average emergency medicine physician in 2024
560 Medicare Part D claims for 267 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 87 claims were for opioids.
Most prescribed
- Ondansetron Odt75 claims
- Hydrocodone-Acetaminophen55 claims
- Cephalexin46 claims
- Prednisone42 claims
- Albuterol Sulfate Hfa40 claims
- Dicyclomine Hcl26 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.
Dennis Keith Alfaro among 7,751 emergency medicine physician records in California
Dennis Keith Alfaro, M.D. 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 96% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 59% of these records are
- 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).
27 emergency medicine physician records list a practice address in Pleasanton
They are 27 of the 2,213 NPPES records with a practice address in Pleasanton, and 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Pleasanton → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Paul Chasin, MDPleasanton, CA 945881649261959
- Michael Costello, MDPleasanton, CA 945881477544781
- Colleen Johnson, MDPleasanton, CA 945881720079049
- Edward Kan, MDPleasanton, CA 945881104804426
- Robert MandibergPleasanton, CA 945881336130640
- Gerald Nazareno, MDPleasanton, CA 945881679564983
- Cynthia Penn-Duecker, MDPleasanton, CA 945881033100359
- Scott Seidman, MDPleasanton, CA 945881184605230
Common questions
What is Dennis Keith Alfaro, M.D.'s NPI number?
Dennis Keith Alfaro, M.D.'s National Provider Identifier (NPI) is 1407847718, issued on Nov 4, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Dennis Keith Alfaro, M.D. located?
The NPPES record lists a practice address at 5555 W Las Positas Blvd, Pleasanton, CA, 94588. Phone: (209) 342-2300. Providers update this record themselves, so call before visiting.
How can I verify Dennis Keith Alfaro, M.D.'s license?
NPPES lists California license number G67215, 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 Dennis Keith Alfaro, M.D. prescribe under Medicare Part D?
In 2024, Dennis Keith Alfaro, M.D. had 560 Medicare Part D claims for 267 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.