SUNG HWAN CHUN (MD) – Clinical Cardiac Electrophysiology Physician, NPI 1477640381
Clinical Cardiac Electrophysiology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
313 CARDIAC ELECTROPHYSIOLOGY in CA
Provider Addresses for SUNG HWAN CHUN (MD)
87 Encina Ave
Palo Alto, CA 943012322
Phone: (650) 853-2975
Type: Location
795 El Camino Real
Palo Alto, CA 943012302
Phone: (650) 321-4121
Type: Location
300 PASTEUR DR
STANFORD, CA 943052200
Phone: (650) 723-4000
Type: Mailing
325, Distel Circle, Los Altos, Santa Clara County, California, 94022, United States
LOS ALTOS, CA 940221408
Phone: (650) 853-2975
Type: Mailing
PAMF Encina Bldg, 87, Encina Avenue, Town & Country Shopping Center, Palo Alto, Santa Clara County, California, 94301, United States
PALO ALTO, CA 943012322
Phone: (650) 853-2975
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 2 Open Payments records for all available years, with a total value of $62.
Total Amount is formed as General ($62) + Research ($0) + Ownership ($0) = $62.
Last reported payment date: 2024-06-03 • Largest payer in this snapshot: Biosense Webster, Inc. ($34).
Total Amount
$62
General + Research + Ownership
Payments
2
Total payment records
General Amount
$62
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-06-03
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Biosense Webster, Inc. | $34 |
| CARDIVA MEDICAL, INC. | $27 |
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: 2004-05-11
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 |
|---|---|---|---|---|
| I20040511001557 | I | Cardiac Electrophysiology | 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 |
|---|---|---|---|---|
| 93296 | Evaluation of single, dual, multiple lead or leadless pacemaker system or implantable defibrillator system, remote up to 90 days | 503 | 382 | $0 |
| 99215 | Established patient office or other outpatient visit, 40-54 minutes | 482 | 279 | $0 |
| 93010 | Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | 410 | 321 | $0 |
| 93294 | Evaluation of single, dual, multiple lead or leadless pacemaker system, remote up to 90 days | 405 | 309 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 353 | 271 | $0 |
Insurance plans in this area (ZIP 94301)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| CARDIAC ELECTROPHYSIOLOGY | CA | 93284 | Evaluation, testing and programming adjustment of defibrillator with analysis, review and report | 23 | 19 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| D E R M A T O L O G Y | CA | |
| A L L E R G Y/ I M M U N O L O G Y | CA | |
| - | CA | |
| Hospitalist, Obstetrics/Gynecology | CA | |
| O B S T E T R I C S/ G Y N E C O L O G Y | OR | |
| - | CA | |
| - | CA | |
| - | CA | |
| - | CA | |
| A N E S T H E S I O L O G Y | CA |
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