Geoffrey Yoon, M.D.
Advanced Heart Failure and Transplant Cardiology Physician · Mountain View, CA
Geoffrey Yoon, M.D. is an advanced heart failure and transplant cardiology physician with a practice address in Mountain View, California, and NPI 1023298353, issued on Nov 3, 2007. Check the license (California A105364, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Geoffrey Yoon
- Credential
- M.D.
- Primary taxonomy
- Advanced Heart Failure and Transplant Cardiology Physician 207RA0001X
- License number
- A105364 CA
Self-reported in NPPES; status is on the state search - Practice location
- 701 E EL Camino Real, Mountain View, CA 94040
- Phone
- (650) 404-8300
- Enumerated
- Nov 3, 2007
- Record last updated
- Nov 29, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20131111000932); accepts Medicare assignment
- Medical or professional school
- Johns Hopkins University School Of Medicine, 2007
- Entity
- Type 1 · individual
8 nearest advanced heart failure and transplant cardiology physician records → All 115 in California → Look up another NPI →
Also registered at 701 E EL Camino Real
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Felix Adler, M.D.Diagnostic Radiology Physician1801069729
- Olga Afanasiev, MD, PHDDermatology Physician1669869384
Verify Geoffrey Yoon in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A105364Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
56% more Medicare Part D claims than the average advanced heart failure and transplant cardiology physician in 2024
3,073 Medicare Part D claims for 516 beneficiaries, against an average of 1,965 among the 1,124 providers of this specialty who prescribed in Part D. Brand-name drugs were 20% of claims.
Most prescribed
- Atorvastatin Calcium316 claims
- Eliquis195 claims
- Metoprolol Tartrate160 claims
- Losartan Potassium152 claims
- Bisoprolol Fumarate145 claims
- Isosorbide Mononitrate Er131 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.
Bills Medicare through one group practice
- Southern California Permanente Medical GroupAnaheim, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Geoffrey Yoon among 115 advanced heart failure and transplant cardiology physician records in California
Geoffrey Yoon, M.D. is one of 115 advanced heart failure and transplant cardiology physician records with a practice address in California. 98% 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 29% of them.
- NPI issued2007 · 29% of these records are older, 59% newer
- In a Medicare fileYes · 98% of these records are
- In the CMS Doctors and Clinicians fileYes · 95% of these records are
- Graduated2007 · median 2007 among the 109 with a school on file
- Record last updated2021 · 43% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RA0001X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Advanced Heart Failure and Transplant Cardiology Physician providers in California
There are 115 advanced heart failure and transplant cardiology physician records in California.
All 115 in California → Every provider in Mountain View → Advanced Heart Failure and Transplant Cardiology Physician nationwide →
The 8 advanced heart failure and transplant cardiology physician records with the nearest ZIP codes
- Mahazarin Ginwalla, M.D.Burlingame, CA 940101518052877
- Jared Herr, MDSan Francisco, CA 941091184959272
- Michael Pham, M.D.San Francisco, CA 941091194735019
- Ranjan Ray, MD PHDSan Francisco, CA 941091033376017
- Yu Xie, M.D.San Francisco, CA 941091295044808
- Mandar ArasSan Francisco, CA 941431720377146
- Claudio Bravo Carrillo, M.D.San Francisco, CA 941431003254186
- Teresa De Marco, MDSan Francisco, CA 941431669420956
Common questions
What is Geoffrey Yoon, M.D.'s NPI number?
Geoffrey Yoon, M.D.'s National Provider Identifier (NPI) is 1023298353, issued on Nov 3, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Geoffrey Yoon, M.D. located?
The NPPES record lists a practice address at 701 E EL Camino Real, Mountain View, CA, 94040. Phone: (650) 404-8300. Providers update this record themselves, so call before visiting.
How can I verify Geoffrey Yoon, M.D.'s license?
NPPES lists California license number A105364, 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 Geoffrey Yoon, M.D. prescribe under Medicare Part D?
In 2024, Geoffrey Yoon, M.D. had 3,073 Medicare Part D claims for 516 beneficiaries; the average among advanced heart failure and transplant cardiology physician prescribers was 1,965. 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.