Justin Hyuck-Jin Junn, MD
Obstetrics & Gynecology Physician · Stanford, CA
Justin Hyuck-Jin Junn, MD is an obstetrics & gynecology physician with a practice address in Stanford, California, and NPI 1164733358, issued on Jun 23, 2010. Check the license (California C169249, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Justin Hyuck-Jin Junn
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License numbers
- C169249 CA
MD60564647 WA
Self-reported in NPPES; status is on the state search - Practice location
- 300 Pasteur Dr, Stanford, CA 94305
- Phone
- (650) 723-4000
- Enumerated
- Jun 23, 2010
- Record last updated
- Apr 26, 2024
- Medicaid ID
- 1164733358 WA
- Medicare enrollment
- Enrolled (PECOS I20200921002226); accepts Medicare assignment
- Medical or professional school
- University Of Michigan Medical School, 2010
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 5,088 in California → Look up another NPI →
Also registered at 300 Pasteur Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Justin Hyuck-Jin Junn in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C169249Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
88% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
19 Medicare Part D claims, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Progesterone12 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 76.5 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
One hospital affiliation
- Stanford Health CareStanford, CA · Acute Care Hospitals5 of 5 stars
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Justin Hyuck-Jin Junn among 5,088 obstetrics & gynecology physician records in California
Justin Hyuck-Jin Junn, MD is one of 5,088 obstetrics & gynecology physician records with a practice address in California. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 70% of them.
- NPI issued2010 · 70% of these records are older, 28% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated2010 · median 2004 among the 2,700 with a school on file
- Record last updated2024 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Obstetrics & Gynecology Physician providers in California
There are 5,088 obstetrics & gynecology physician records in California.
All 5,088 in California → Every provider in Stanford → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Anna Altshuler, MDStanford, CA 943051447583877
- Rachel Chan Seay, MDStanford, CA 943051578790127
- Brooke Friedman, M.D.Stanford, CA 943051487836052
- Amreen Husain, MDStanford, CA 943051790856474
- Mary JacobsonStanford, CA 943051952443913
- Michelle Khan, MDStanford, CA 943051699970947
- Jonathan Kort, M.D.Stanford, CA 943051326364332
- Lisa Lee, MDStanford, CA 943051952374936
Common questions
What is Justin Hyuck-Jin Junn, MD's NPI number?
Justin Hyuck-Jin Junn, MD's National Provider Identifier (NPI) is 1164733358, issued on Jun 23, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Justin Hyuck-Jin Junn, MD located?
The NPPES record lists a practice address at 300 Pasteur Dr, Stanford, CA, 94305. Phone: (650) 723-4000. Providers update this record themselves, so call before visiting.
How can I verify Justin Hyuck-Jin Junn, MD's license?
NPPES lists California license number C169249, 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 Justin Hyuck-Jin Junn, MD prescribe under Medicare Part D?
In 2024, Justin Hyuck-Jin Junn, MD had 19 Medicare Part D claims; the average among obstetrics & gynecology physician prescribers was 165. Part D covers Medicare prescriptions only.
What is Justin Hyuck-Jin Junn, MD's MIPS final score?
The 2023 MIPS final score is 76.5 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.