Francis Kuan-Jen Ko, M.D.
Family Medicine Physician · Vallejo, CA
Francis Kuan-Jen Ko, M.D. is a family medicine physician with a practice address in Vallejo, California, and NPI 1912102179, issued on Jun 18, 2007. Check the license (California A62309, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Francis Kuan-Jen Ko
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- A62309 CA
Self-reported in NPPES; status is on the state search - Practice location
- 355 Tuolumne St, Vallejo, CA 94590
- Phone
- (707) 553-5509
- Enumerated
- Jun 18, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 355 Tuolumne St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Nancy Davidson, R.N., P.H.N.Case Management Registered Nurse1346450681
- Jennifer Doran, RN, PHNRegistered Nurse1588711774
Verify Francis Kuan-Jen Ko in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A62309Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Francis Kuan-Jen Ko among 17,133 family medicine physician records in California
Francis Kuan-Jen Ko, M.D. is one of 17,133 family 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 not. Its NPI, issued in 2007, is newer than 41% of them.
- NPI issued2007 · 41% of these records are older, 47% newer
- In a Medicare fileNo · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 62% of these records are
- Record last updated2007 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
66 family medicine physician records list a practice address in Vallejo
They are 66 of the 2,836 NPPES records with a practice address in Vallejo, and 17,133 family medicine physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 17,133 in California → Every provider in Vallejo → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Zoe Cappe, M.DVallejo, CA 945901326421108
- Matthew Fagan, D.O.Vallejo, CA 945901740488543
- Wasfa Jahangiri, MDVallejo, CA 945901215021175
- James Lessenger, MDVallejo, CA 945901427206796
- Steve Lim, MDVallejo, CA 945901174548481
- Moneesha Mukherjee, MDVallejo, CA 945901386374700
- Kyra Ray, MDVallejo, CA 945901154948925
- Jay Shubrook, DOVallejo, CA 945901336179704
Common questions
What is Francis Kuan-Jen Ko, M.D.'s NPI number?
Francis Kuan-Jen Ko, M.D.'s National Provider Identifier (NPI) is 1912102179, issued on Jun 18, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Francis Kuan-Jen Ko, M.D. located?
The NPPES record lists a practice address at 355 Tuolumne St, Vallejo, CA, 94590. Phone: (707) 553-5509. Providers update this record themselves, so call before visiting.
How can I verify Francis Kuan-Jen Ko, M.D.'s license?
NPPES lists California license number A62309, 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.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.