Dr. David Hyun, MD
- Medicare services, 2024
- 1,770
- Medicare patients, 2024
- 642
- Part D claims, 2024
- 4,716
- MIPS score, 2024
- 95
- Hospital affiliations
- 3
- Practice address
- 751 South Bascom Avenue, San Jose, CA 95128
- Practice phone
- Call (408) 885-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Hyun'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. David Hyun is a cardiologist in San Jose, California
Dr. Hyun practices at Santa Clara Valley Medical Center in San Jose, California, part of County of Santa Clara, CA.
Dr. Hyun's NPI, 1255312005, was assigned on November 9, 2005. Dr. Hyun graduated from SUNY Downstate Health Sciences University in 1990. Dr. Hyun holds California license A56256.
- NPI
- 1255312005NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3072572577
- NPI enumeration date
- November 9, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (408) 885-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 59
- Medical school graduation
- 1990
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. David Hyun practices at Santa Clara Valley Medical Center in San Jose, California
Dr. Hyun's primary practice is Santa Clara Valley Medical Center, at 751 South Bascom Avenue, San Jose, CA 95128 in Santa Clara County. The practice phone is (408) 885-5000.
- Santa Clara Valley Medical Center751 South Bascom Avenue, San Jose, CA 95128 · Santa Clara CountyPhone(408) 885-5000
Source: Dmand AI Affiliation Data
Dr. David Hyun is affiliated with 5 sites of care and 1 medical group
Dr. Hyun's primary practice is Santa Clara Valley Medical Center in San Jose, California, part of County of Santa Clara, CA. Dr. Hyun is also affiliated with Good Samaritan Hospital. The medical group on file is County of Santa Clara Behavioral Health Services, Las Plumas Behavioral Health Clinic. Dmand AI also links Dr. Hyun to 1 more hospital, 1 community health center and 1 physician office, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. David Hyun's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Hyun practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Santa Clara Valley Medical Center | Available with a free account |
| +4 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across County of Santa Clara, CA and 6.2K+ hospitals, with verified contacts in the same login.
Dr. David Hyun is one of 2,375 cardiologists in California
Cardiovascular disease is Dr. Hyun's primary specialty in the NPI Registry, under taxonomy code 207RC0000X. Dmand AI has Dr. Hyun's licenses on file in 2 states: California and Louisiana.
Specialties and state licenses
- Cardiovascular disease, CaliforniaPrimary
- Louisiana license
Clinical focus
Dmand AI lists aneurysm, aortic atherosclerois, atrial fibrillation and flutter, cardiac catheterization, cardiomyopathy, cerebrovascular disease, chronic hypertension and coronary artery disease among the conditions Dr. Hyun treats.
Cardiologists near Dr. Hyun
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. David Hyun billed Medicare for 1,770 services in 2024
CMS data shows 1,770 Medicare services from Dr. Hyun across 16 procedure codes in 2024, for 642 Medicare patients. Medicare paid $259,109 for them.
Dr. Hyun's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,5362024: 1,25418%
- Tests and treatments
- 2023: 8562024: 51640%
- Other services
- 2023: 212024: 0100%
Where Dr. Hyun's Medicare services took place, 2024
- In an office1,51686%
- In a facility25414%
Dr. Hyun compared with the California median for cardiologists, 2024
- Dr. Hyun
- California median
- Medicare services
- 1,770vs 1,56013% above
- Medicare patients
- 642vs 644Close to median
- Part D claims
- 4,285vs 1,4103.0 times
Medians across 2,237 cardiologists in California with Dmand AI profiles that report each measure.
Dr. Hyun'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. Hyun?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Hyun and other cardiologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. David Hyun treated 642 Medicare patients in 2024, average age 78
CMS counts 642 Medicare patients who saw Dr. Hyun in 2024. The largest group is 75 to 84, with 248 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 20% are also on Medicaid. Their average risk score is 1.53, 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. Hyun's median patient age at 71, with 48% women.
Dr. Hyun's Medicare patients by age, 2024
Dr. Hyun's Medicare patients by sex, 2024
- Women36056%
- Men28244%
Chronic conditions among Dr. Hyun's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Diabetes45%
- Arthritis43%
- Ischemic heart disease43%
- Atrial fibrillation33%
- Chronic kidney disease33%
- Heart failure33%
Share of Medicare patients with each condition. A patient can have several.
Dr. Hyun's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 71
Patient panel by sex, all payers
- Women48%
- Men51%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. David Hyun wrote 4,716 Medicare Part D claims in 2024
In 2024, Dr. Hyun wrote 4,716 Medicare Part D claims for 446 patients. 78% of them were for generic drugs. CMS names the drug for 4,285 of them, across 75 drugs with 11 or more claims each, at $1,004,905 in total drug cost. In 2023, CMS named 4,237 claims across 71 drugs.
Dr. Hyun's Part D claims by kind of drug, 2024
- Generic3,689 claims78%
- Brand-name and other1,027 claims22%
Dr. Hyun'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. Hyun's Part D claims, 2024
- Opioids0%17 of 4,716 claims
- Antibiotics1%37 of 4,716 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: 4,2372024: 4,2851%
Drugs named by CMS: 75 in 2024, 71 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
Dr. David Hyun scored 95 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 95 out of 100 for Dr. Hyun for performance year 2024, reported individually. Dr. Hyun accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Hyun's MIPS scores, performance year 2024
- 95of 100Final score
- 88.3of 100Quality
- 40of 100Improvement Activities
- 86of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. David Hyun received $10,590 in industry payments from 2016 to 2025
CMS Open Payments shows 548 general payments to Dr. Hyun from 28 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 98% of the total. Janssen Pharmaceuticals, Inc paid the most, $1,909.
General payments to Dr. Hyun by program year, 2016 to 2025
General payments to Dr. Hyun by kind, 2016 to 2025
- Food and beverage$10,36198%
- Education$2292%
Companies that paid Dr. Hyun the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. David Hyun graduated from SUNY Downstate Health Sciences University
Dr. Hyun graduated from SUNY Downstate Health Sciences University in 1990.
- Medical school
Source: Dmand AI Professional Profile Data
Dr. David Hyun accepts plans from 14 insurance carriers
Dr. Hyun is in network with 14 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Elevance
- HCSC
- Blue Cross Blue Shield of Massachusetts
- Regence Health Plans
- Alliant Health Plans
- +6 more carriersWith a free account
Plan types Dr. Hyun accepts, by number of carriers
- PPO9
- Medicare7
- HMO6
- EPO4
- POS4
Source: Dmand AI Insurance Network Data
Sources for Dr. David Hyun'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)Clinician Public Reporting: Overall MIPS Performance (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. David Hyun
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. David Hyun's NPI number?
Dr. David Hyun's NPI number is 1255312005. It was assigned on November 9, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. David Hyun?
Dr. David Hyun is a cardiologist in San Jose, California. The primary specialty in the NPI Registry is Cardiovascular Disease Physician (taxonomy code 207RC0000X).
Where does Dr. David Hyun practice?
Dr. Hyun practices at 751 South Bascom Avenue, San Jose, CA 95128. Dr. Hyun's primary practice is Santa Clara Valley Medical Center in San Jose, California, part of County of Santa Clara, CA. Dmand AI also links Dr. Hyun to 1 hospital, 1 community health center and 1 physician office.
What is Dr. David Hyun's office phone number?
The practice phone on file for Dr. Hyun is (408) 885-5000.
What is Dr. David Hyun's medical license number?
Dr. Hyun holds California license A56256, one of the licenses on file in 2 states.
Which states has Dr. David Hyun been licensed in?
Dmand AI has state licenses on file for Dr. Hyun in California (1996 to 2026) and Louisiana (1993 to 2005).
Which hospitals is Dr. David Hyun affiliated with?
Dr. Hyun practices at Santa Clara Valley Medical Center in San Jose, California. Dr. Hyun is also affiliated with Good Samaritan Hospital. Dmand AI links Dr. Hyun to 1 more hospital.
What medical group is Dr. David Hyun part of?
Dr. Hyun is linked to County of Santa Clara Behavioral Health Services, Las Plumas Behavioral Health Clinic.
Does Dr. David Hyun accept Medicare?
Yes. CMS data shows Dr. Hyun billed Medicare for 1,770 services in 2024, and Dr. Hyun accepts Medicare assignment.
What is Dr. David Hyun's MIPS score?
Dr. Hyun's MIPS final score for performance year 2024 is 95 out of 100, reported individually.
Show 7 more questionsShow fewer questions
How many Medicare patients does Dr. David Hyun see?
CMS counts 642 Medicare patients who saw Dr. Hyun in 2024, with an average age of 78.
What services does Dr. David Hyun bill to Medicare?
In 2024, Dr. Hyun's most billed Medicare services were office visit, established patient (99215), heart test or procedure (93306) and office visit, new patient (99205).
Where did Dr. David Hyun go to medical school?
Dr. Hyun graduated from SUNY Downstate Health Sciences University in 1990.
What drugs does Dr. David Hyun prescribe most?
In 2024 Medicare Part D data, Dr. Hyun's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Eliquis.
Has Dr. David Hyun received payments from drug or device companies?
CMS Open Payments shows $10,590 in general payments to Dr. Hyun from 28 companies from 2016 to 2025. The largest total came from Janssen Pharmaceuticals, Inc.
How long has Dr. David Hyun been practicing?
Dr. Hyun graduated from medical school in 1990, 36 years ago.
What insurance does Dr. David Hyun accept?
Dr. Hyun is in network with 14 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.
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