DR. REX TONG HYUN CHUNG (M.D.) – Surgical Critical Care Physician, NPI 1003021882
Surgical Critical Care Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
2,125 CRITICAL CARE (INTENSIVISTS) in CA
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Provider Addresses for DR. REX TONG HYUN CHUNG (M.D.)
25246, Barton Road, Loma Linda, San Bernardino County, California, 92354, United States
APT. #12
LOMA LINDA, CA 923543060
Phone: (909) 210-8222
Type: Mailing
11175, Campus Street, Loma Linda, San Bernardino County, California, 92354, United States
RM 21008
LOMA LINDA, CA 923501700
Phone: (909) 558-8131
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 24 Open Payments records for all available years, with a total value of $4,364.
Total Amount is formed as General ($4,364) + Research ($0) + Ownership ($0) = $4,364.
Last reported payment date: 2024-12-31 • Largest payer in this snapshot: Intuitive Surgical, Inc. ($4,171).
Total Amount
$4,364
General + Research + Ownership
Payments
24
Total payment records
General Amount
$4,364
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-31
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Intuitive Surgical, Inc. | $4,171 |
| Medtronic, Inc. | $175 |
| Ethicon US, LLC | $17 |
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: 2011-07-15
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 |
|---|---|---|---|---|
| I20110715000342 | I | Critical Care (Intensivists) | 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 |
|---|---|---|---|---|
| 99291 | Critical care, first 30-74 minutes | 220 | 74 | $0 |
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 157 | 69 | $0 |
| 99223 | Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 50 | 49 | $0 |
| 99233 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 44 | 34 | $0 |
| 99231 | Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | 42 | 41 | $0 |
Insurance plans in this area (ZIP 92354)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| CRITICAL CARE (INTENSIVISTS) | CA | 36620 | Insertion of arterial catheter for blood sampling or infusion, accessed through the skin | 12 | 12 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| - | WA | |
| Nurse Practitioner | CA | |
| Physician Assistant | CA | |
| Clinical Psychologist | CA | |
| Nurse Practitioner | CA | |
| N E U R O S U R G E R Y | OH | |
| Nurse Practitioner | CA | |
| General Surgery, Critical Care (Intensivists) | CA | |
| Internal Medicine | CA | |
| Endocrinology, Internal Medicine | CA |
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