Dr. Chi-Hyun You, MD
- Medicare services, 2024
- 59
- Medicare patients, 2024
- 69
- Part D claims, 2024
- 2,266
- Hospital affiliations
- 1
- Industry payments
- $437
- Practice address
- 25825 South Vermont Avenue, Harbor City, CA 90710
- Practice phone
- Call (310) 325-5111
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. You's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Chi-Hyun You is a cardiologist in Harbor City, California
Dr. You practices at Kaiser Permanente South Bay Medical Center in Harbor City, California, part of Kaiser Permanente.
Dr. You's NPI, 1306117064, was assigned on January 25, 2012. Dr. You graduated from UMKC School of Medicine in 2009. Dr. You holds California license A121924.
- NPI
- 1306117064NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9638450034
- NPI enumeration date
- January 25, 2012
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (310) 325-5111
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 43
- Medical school graduation
- 2009
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Chi-Hyun You practices at Kaiser Permanente South Bay Medical Center in Harbor City, California
Dr. You's primary practice is Kaiser Permanente South Bay Medical Center, at 25825 South Vermont Avenue, Harbor City, CA 90710 in Los Angeles County. The practice phone is (310) 325-5111.
- Kaiser Permanente South Bay Medical Center25825 South Vermont Avenue, Harbor City, CA 90710 · Los Angeles CountyPhone(310) 325-5111
Source: Dmand AI Affiliation Data
Dr. Chi-Hyun You is affiliated with 1 site of care and 1 medical group
Dr. You's primary practice is Kaiser Permanente South Bay Medical Center in Harbor City, California, part of Kaiser Permanente. The medical group on file is Southern California Permanente Medical Group.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Chi-Hyun You's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. You practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Kaiser Permanente South Bay Medical Center | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Chi-Hyun You is one of 2,375 cardiologists in California
Cardiovascular disease is Dr. You's primary specialty in the NPI Registry, under taxonomy code 207RC0000X. Dr. You is board certified in cardiovascular disease by the American Board of Internal Medicine. Dr. You is licensed in California.
Specialties and state licenses
- Cardiovascular disease, CaliforniaPrimary
Clinical focus
Dmand AI lists cardiomyopathy and chronic hypertension among the conditions Dr. You treats.
Cardiologists near Dr. You
Counts of cardiologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Chi-Hyun You billed Medicare for 59 services in 2024
CMS data shows 59 Medicare services from Dr. You across 2 procedure codes in 2024, for 69 Medicare patients. Medicare paid $3,211 for them.
Dr. You's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 132024: 38192%
- Drugs given in the office
- 2023: 302024: 2130%
Where Dr. You's Medicare services took place, 2024
- In an office4881%
- In a facility1119%
Dr. You compared with the California median for cardiologists, 2024
- Dr. You
- California median
- Medicare services
- 59vs 1,56096% below
- Medicare patients
- 69vs 64489% below
- Part D claims
- 2,186vs 1,41055% above
Medians across 2,237 cardiologists in California with Dmand AI profiles that report each measure.
Dr. You's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. You?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. You and other cardiologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Chi-Hyun You treated 69 Medicare patients in 2024, average age 68
CMS counts 69 Medicare patients who saw Dr. You in 2024. The largest group is under 65, with 23 patients. 75% of them have high blood pressure, and 65% have high cholesterol. 49% are also on Medicaid. Their average risk score is 2.34, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. You's median patient age at 63, with 63% women.
Dr. You's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. You's Medicare patients by sex, 2024
- Women4058%
- Men2942%
Chronic conditions among Dr. You's Medicare patients, 2024
- High blood pressure75%
- High cholesterol65%
- Diabetes49%
- Chronic kidney disease38%
- Heart failure36%
- Arthritis33%
- Anxiety28%
- Ischemic heart disease28%
Share of Medicare patients with each condition. A patient can have several.
Dr. You's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 63
Patient panel by sex, all payers
- Women63%
- Men37%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Chi-Hyun You wrote 2,266 Medicare Part D claims in 2024
In 2024, Dr. You wrote 2,266 Medicare Part D claims for 446 patients. 80% of them were for generic drugs. CMS names the drug for 2,186 of them, across 29 drugs with 11 or more claims each, at $236,959 in total drug cost. In 2023, CMS named 1,890 claims across 25 drugs.
Dr. You's Part D claims by kind of drug, 2024
- Generic1,807 claims80%
- Brand-name459 claims20%
Dr. You's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. You's Part D claims, 2024
- Antibiotics1%24 of 2,266 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1,8902024: 2,18616%
Drugs named by CMS: 29 in 2024, 25 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Chi-Hyun You takes part in Medicare
Dr. You accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Upper gastrointestinal (GI) endoscopy for acid reflux: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Chi-Hyun You received $437 in industry payments in 2016
CMS Open Payments shows 6 general payments to Dr. You from 4 drug and device companies in 2016. Food and beverage make up the largest share, 98% of the total. Medtronic Vascular, Inc. paid the most, $153.
General payments to Dr. You by kind, 2016 to 2016
- Food and beverage$42898%
- Travel and lodging$92%
Companies that paid Dr. You the most, 2016 to 2016
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Chi-Hyun You graduated from UMKC School of Medicine
Dr. You graduated from UMKC School of Medicine in 2009. Dr. You is a member of ACC.
- Medical school
- Board certified in cardiovascular disease
Source: Dmand AI Professional Profile Data
Dr. Chi-Hyun You accepts plans from 2 insurance carriers
Dr. You is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Kaiser Permanente
- CMS Medicare
Plan types Dr. You accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Chi-Hyun You's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Chi-Hyun You
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Chi-Hyun You's NPI number?
Dr. Chi-Hyun You's NPI number is 1306117064. It was assigned on January 25, 2012, and it is active in the NPI Registry.
What kind of doctor is Dr. Chi-Hyun You?
Dr. Chi-Hyun You is a cardiologist in Harbor City, California. The primary specialty in the NPI Registry is Cardiovascular Disease Physician (taxonomy code 207RC0000X).
Where does Dr. Chi-Hyun You practice?
Dr. You practices at 25825 South Vermont Avenue, Harbor City, CA 90710. Dr. You's primary practice is Kaiser Permanente South Bay Medical Center in Harbor City, California, part of Kaiser Permanente.
What is Dr. Chi-Hyun You's office phone number?
The practice phone on file for Dr. You is (310) 325-5111.
What is Dr. Chi-Hyun You's medical license number?
Dr. You holds California license A121924.
Which hospitals is Dr. Chi-Hyun You affiliated with?
Dr. You practices at Kaiser Permanente South Bay Medical Center in Harbor City, California.
What medical group is Dr. Chi-Hyun You part of?
Dr. You is linked to Southern California Permanente Medical Group.
Does Dr. Chi-Hyun You accept Medicare?
Yes. CMS data shows Dr. You billed Medicare for 59 services in 2024, and Dr. You accepts Medicare assignment.
How many Medicare patients does Dr. Chi-Hyun You see?
CMS counts 69 Medicare patients who saw Dr. You in 2024, with an average age of 68.
Is Dr. Chi-Hyun You board certified?
Yes. Dr. You is board certified in cardiovascular disease by the American Board of Internal Medicine.
Show 6 more questionsShow fewer questions
What services does Dr. Chi-Hyun You bill to Medicare?
In 2024, Dr. You's most billed Medicare services were heart test or procedure (93306) and injected or infused drug (J7030).
Where did Dr. Chi-Hyun You go to medical school?
Dr. You graduated from UMKC School of Medicine in 2009.
What drugs does Dr. Chi-Hyun You prescribe most?
In 2024 Medicare Part D data, Dr. You's most prescribed drugs by claims were Pradaxa, Metoprolol Tartrate and Atorvastatin Calcium.
Has Dr. Chi-Hyun You received payments from drug or device companies?
CMS Open Payments shows $437 in general payments to Dr. You from 4 companies from 2016 to 2016. The largest total came from Medtronic Vascular, Inc.
How long has Dr. Chi-Hyun You been practicing?
Dr. You graduated from medical school in 2009, 17 years ago.
What insurance does Dr. Chi-Hyun You accept?
Dr. You is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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