Jonathan Wayne Chun, MD
Internal Medicine Physician · Palo Alto, CA
Jonathan Wayne Chun, MD is an internal medicine physician with a practice address in Palo Alto, California, and NPI 1790164952, issued on May 21, 2015. Check the license (California 167262, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Jonathan Wayne Chun
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 167262 CA
D7362369 CA
286144 NY
Self-reported in NPPES; status is on the state search - Practice location
- 3801 Miranda Ave, Palo Alto, CA 94304
- Phone
- (650) 493-5000
- Enumerated
- May 21, 2015
- Record last updated
- May 27, 2022
- Medicare enrollment
- Enrolled (PECOS I20200422003059); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 3801 Miranda Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Jonathan Wayne Chun in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 167262Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average internal medicine physician in 2024
29 Medicare Part D claims for 12 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
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 2 group practices
- Permanente Medical Group IncSanta Clara, CA
- Sutter Bay Medical FoundationPalo Alto, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jonathan Wayne Chun among 17,696 internal medicine physician records in California
Jonathan Wayne Chun, MD is one of 17,696 internal medicine physician records with a practice address in California. 79% 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 76% of them.
- NPI issued2015 · 76% of these records are older, 21% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2015 · median 2004 among the 11,065 with a school on file
- Record last updated2022 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
187 internal medicine physician records list a practice address in Palo Alto
They are 187 of the 7,617 NPPES records with a practice address in Palo Alto, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Palo Alto → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
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- Susan Frayne, MD, MPHPalo Alto, CA 943041952314890
- James Hallenbeck, MDPalo Alto, CA 943041316982358
- Rhonda Hamilton, M.D.Palo Alto, CA 943041225063241
Common questions
What is Jonathan Wayne Chun, MD's NPI number?
Jonathan Wayne Chun, MD's National Provider Identifier (NPI) is 1790164952, issued on May 21, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Jonathan Wayne Chun, MD located?
The NPPES record lists a practice address at 3801 Miranda Ave, Palo Alto, CA, 94304. Phone: (650) 493-5000. Providers update this record themselves, so call before visiting.
How can I verify Jonathan Wayne Chun, MD's license?
NPPES lists California license number 167262, 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 Jonathan Wayne Chun, MD prescribe under Medicare Part D?
In 2024, Jonathan Wayne Chun, MD had 29 Medicare Part D claims for 12 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.