MR. DAVID HYUN (MD) – Cardiovascular Disease Physician, NPI 1255312005
Cardiovascular Disease Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
3,010 CARDIOVASCULAR DISEASE (CARDIOLOGY) in CA
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Provider Addresses for MR. DAVID HYUN (MD)
4585, Stevens Creek Boulevard, San Jose, Santa Clara County, California, 95129, United States
#101
SANTA CLARA, CA 950516700
Phone: (408) 298-0433
Fax: (408) 295-8818
Type: Mailing
2020 FOREST AVE STE. 3
SAN JOSE, CA 951284805
Phone: (408) 298-0433
Fax: (408) 295-8818
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 112 Open Payments records for all available years, with a total value of $2,648.
Total Amount is formed as General ($2,648) + Research ($0) + Ownership ($0) = $2,648.
Last reported payment date: 2024-12-11 • Largest payer in this snapshot: E.R. Squibb & Sons, L.L.C. ($656).
Total Amount
$2,648
General + Research + Ownership
Payments
112
Total payment records
General Amount
$2,648
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-11
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| E.R. Squibb & Sons, L.L.C. | $656 |
| Amgen Inc. | $400 |
| Boston Scientific Corporation | $331 |
| Janssen Pharmaceuticals, Inc | $295 |
| AstraZeneca Pharmaceuticals LP | $201 |
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2004-10-08
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20041008001312 | I | Cardiovascular Disease (Cardiology) | CA | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99215 | Established patient office or other outpatient visit, 40-54 minutes | 1,042 | 514 | $0 |
| 93306 | Ultrasound of heart with color-depicted blood flow, rate, direction and valve function | 409 | 398 | $0 |
| 99233 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 223 | 32 | $0 |
| 93042 | Electrocardiogram (ecg) 1 to 3 leads with review by physician only | 203 | 30 | $0 |
| 99205 | New patient office or other outpatient visit, 60-74 minutes | 123 | 123 | $0 |
Insurance plans in this area (ZIP 95051)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| CARDIOVASCULAR DISEASE (CARDIOLOGY) | CA | 78452 | Nuclear medicine study of vessels of heart using drugs or exercise multiple studies | 61 | 61 |
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