Yoon Young Ko, DO
Family Medicine Physician · Tracy, CA
Yoon Young Ko, DO is a family medicine physician with a practice address in Tracy, California, and NPI 1396304457, issued on Jun 11, 2019. Check the license (California 20A20130, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Yoon Young Ko
- Credential
- DO
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License numbers
- 20A20130 CA
25MB11247200 NJ
Self-reported in NPPES; status is on the state search - Practice location
- 599 E Valpico RD, Tracy, CA 95376
- Phone
- (209) 830-4072
- Enumerated
- Jun 11, 2019
- Record last updated
- Nov 4, 2025
- Fax
- (209) 454-3191
- Medicare enrollment
- Enrolled (PECOS I20221010001658); accepts Medicare assignment
- Medical or professional school
- Touro Un Col Of Osteopathic Medicine, New York, 2019
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 599 E Valpico RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Pearl Chan, MDFamily Medicine Physician1932859675
Verify Yoon Young Ko in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A20130Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
51% fewer Medicare Part D claims than the average family medicine physician in 2024
1,741 Medicare Part D claims for 323 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 58 claims were for opioids.
Most prescribed
- Atorvastatin Calcium169 claims
- Amlodipine Besylate86 claims
- Levothyroxine Sodium80 claims
- Losartan Potassium68 claims
- Hydrochlorothiazide53 claims
- Trazodone Hcl53 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 2 group practices
- Permanente Medical Group IncOakland, CA
- Sutter Valley Medical FoundationSacramento, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Yoon Young Ko among 17,133 family medicine physician records in California
Yoon Young Ko, DO 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. Its NPI, issued in 2019, is newer than 85% of them.
- NPI issued2019 · 85% of these records are older, 12% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2019 · median 2005 among the 10,652 with a school on file
- Record last updated2025 · 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).
35 family medicine physician records list a practice address in Tracy
They are 35 of the 1,864 NPPES records with a practice address in Tracy, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Tracy → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Robert Acosta, D.O.Tracy, CA 953761003853649
- Ross Caulfield, MDTracy, CA 953761356764518
- Deepthy Damien, M.D.Tracy, CA 953761811222391
- Jasdeep Dhami, M.D.Tracy, CA 953761770978579
- Shital Hubli, M.D.Tracy, CA 953761053339127
- Stephen Kruger, DOTracy, CA 953761053979674
- Devinder Makker, MDTracy, CA 953761568421030
- Pranjalkumar Patel, M.D.Tracy, CA 953761225233133
Common questions
What is Yoon Young Ko, DO's NPI number?
Yoon Young Ko, DO's National Provider Identifier (NPI) is 1396304457, issued on Jun 11, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Yoon Young Ko, DO located?
The NPPES record lists a practice address at 599 E Valpico RD, Tracy, CA, 95376. Phone: (209) 830-4072. Providers update this record themselves, so call before visiting.
How can I verify Yoon Young Ko, DO's license?
NPPES lists California license number 20A20130, 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 Yoon Young Ko, DO prescribe under Medicare Part D?
In 2024, Yoon Young Ko, DO had 1,741 Medicare Part D claims for 323 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.