LAWRENCE CHUNG-LUN CHANG (M.D.) – Internal Medicine Physician, NPI 1528046430
Internal Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
21,511 INTERNAL MEDICINE in CA
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Provider Addresses for LAWRENCE CHUNG-LUN CHANG (M.D.)
665, Camino de Los Mares, San Clemente, Orange County, California, 92673, United States
SUITE 301
SAN CLEMENTE, CA 926732859
Phone: (949) 240-9664
Fax: (949) 240-0327
Mailing address matches the actual address.
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 $966.
Total Amount is formed as General ($966) + Research ($0) + Ownership ($0) = $966.
Last reported payment date: 2024-12-24 • Largest payer in this snapshot: Abbott Laboratories ($241).
Total Amount
$966
General + Research + Ownership
Payments
24
Total payment records
General Amount
$966
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-24
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Abbott Laboratories | $241 |
| Inari Medical, Inc. | $177 |
| NuVasive, Inc. | $145 |
| Janssen Pharmaceuticals, Inc | $100 |
| Eisai Inc. | $71 |
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: 2010-02-20
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 |
|---|---|---|---|---|
| I20100220000411 | I | Internal Medicine | 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 |
|---|---|---|---|---|
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 581 | 198 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 119 | 86 | $0 |
| G0439 | Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 91 | 91 | $0 |
| G0008 | Administration of influenza virus vaccine | 80 | 80 | $0 |
| 90688 | Influenza vaccine, quadrivalent, 0.5 ml dosage | 71 | 71 | $0 |
Insurance plans in this area (ZIP 92673)
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