Chi-Hyun You, M.D.
Cardiovascular Disease Physician · Harbor City, CA
Chi-Hyun You, M.D. is a cardiovascular disease physician with a practice address in Harbor City, California, and NPI 1306117064, issued on Jan 25, 2012. Check the license (California A121924, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Chi-Hyun You
- Credential
- M.D.
- Primary taxonomy
- Cardiovascular Disease Physician 207RC0000X
- License numbers
- A121924 CA
113418 CA
Self-reported in NPPES; status is on the state search - Practice location
- 25825 South Vermont Ave., Harbor City, CA 90710
- Phone
- (310) 325-5111
- Enumerated
- Jan 25, 2012
- Record last updated
- Nov 9, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20161222001428); accepts Medicare assignment
- Medical or professional school
- University Of Missouri, Kansas City, School Of Medicine, 2009
- Entity
- Type 1 · individual
8 nearest cardiovascular disease physician records → All 2,574 in California → Look up another NPI →
Verify Chi-Hyun You in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A121924Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
26% fewer Medicare Part D claims than the average cardiovascular disease physician in 2024
2,266 Medicare Part D claims for 446 beneficiaries, against an average of 3,078 among the 20,728 providers of this specialty who prescribed in Part D. Brand-name drugs were 20% of claims.
Most prescribed
- Pradaxa300 claims
- Metoprolol Tartrate243 claims
- Atorvastatin Calcium240 claims
- Bisoprolol Fumarate240 claims
- Carvedilol138 claims
- Furosemide137 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 GroupHarbor City, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Chi-Hyun You among 2,574 cardiovascular disease physician records in California
Chi-Hyun You, M.D. is one of 2,574 cardiovascular disease physician records with a practice address in California. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 79% of them.
- NPI issued2012 · 79% of these records are older, 18% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2009 · median 1999 among the 1,742 with a school on file
- Record last updated2021 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Cardiovascular Disease Physician providers in California
There are 2,574 cardiovascular disease physician records in California.
All 2,574 in California → Every provider in Harbor City → Cardiovascular Disease Physician nationwide →
The 8 cardiovascular disease physician records with the nearest ZIP codes
- Howard Baik, MDHarbor City, CA 907101053482034
- Hed Ahmadpour, M.D.Lakewood, CA 907121912093436
- Isaac Eisenstein, M.D.Lakewood, CA 907121780649830
- William Madrid, M.D.Lakewood, CA 907121467419366
- Milan Rawal, M.D.Lakewood, CA 907121093913147
- Miguel Sanmarco, M.D.Lakewood, CA 907121508825258
- Kartik Thaker, M.D.Lakewood, CA 907121144207739
- Joseph Angelo, MDBellflower, CA 907061114075900
Common questions
What is Chi-Hyun You, M.D.'s NPI number?
Chi-Hyun You, M.D.'s National Provider Identifier (NPI) is 1306117064, issued on Jan 25, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Chi-Hyun You, M.D. located?
The NPPES record lists a practice address at 25825 South Vermont Ave., Harbor City, CA, 90710. Phone: (310) 325-5111. Providers update this record themselves, so call before visiting.
How can I verify Chi-Hyun You, M.D.'s license?
NPPES lists California license number A121924, 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 Chi-Hyun You, M.D. prescribe under Medicare Part D?
In 2024, Chi-Hyun You, M.D. had 2,266 Medicare Part D claims for 446 beneficiaries; the average among cardiovascular disease physician prescribers was 3,078. 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.