RUEY JEN CHANG (P.A.) – Medical Physician Assistant, NPI 1699064006
Medical Physician Assistant
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
10,570 PHYSICIAN ASSISTANT in CA
Provider Addresses for RUEY JEN CHANG (P.A.)
5451 LA PALMA AVE
SUITE 25
LA PALMA, CA 906231728
Phone: (714) 670-1340
Fax: (714) 443-3780
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 126 Open Payments records for all available years, with a total value of $2,650.
Total Amount is formed as General ($2,650) + Research ($0) + Ownership ($0) = $2,650.
Last reported payment date: 2024-12-18 • Largest payer in this snapshot: Janssen Biotech, Inc. ($330).
Total Amount
$2,650
General + Research + Ownership
Payments
126
Total payment records
General Amount
$2,650
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-18
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Janssen Biotech, Inc. | $330 |
| UCB, Inc. | $274 |
| ABBVIE INC. | $268 |
| Novartis Pharmaceuticals Corporation | $265 |
| GlaxoSmithKline, LLC. | $213 |
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: 2011-06-02
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 |
|---|---|---|---|---|
| I20110602000103 | I | Physician Assistant | 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 |
|---|---|---|---|---|
| J7332 | Hyaluronan or derivative, triluron, for intra-articular injection, 1 mg | 1,220 | 25 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 226 | 144 | $0 |
| 20611 | Aspiration and/or injection of fluid large joint using ultrasound guidance | 125 | 50 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 69 | 66 | $0 |
| 76881 | Complete ultrasound scan of joint | 52 | 26 | $0 |
Insurance plans in this area (ZIP 90623)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Physician Assistant | CA | |
| Physician Assistant | CA | |
| Internal Medicine, Rheumatology | CA | |
| R H E U M A T O L O G Y | CA | |
| - | CA | |
| Physician Assistant | CA | |
| Rheumatology, Internal Medicine, Pediatric Medicine | CA | |
| R H E U M A T O L O G Y | CA | |
| Nurse Practitioner | CA |
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