DR. LOREN YUI CHEN (M.D.) – Internal Medicine Physician, NPI 1972581643
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 DR. LOREN YUI CHEN (M.D.)
Roscoe Boulevard, Panorama City, Los Angeles, Los Angeles County, California, 91331-6020, United States
SUITE 307
PANORAMA CITY, CA 914024665
Phone: (818) 787-4084
Fax: (818) 994-4491
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 5 Open Payments records for all available years, with a total value of $189.
Total Amount is formed as General ($189) + Research ($0) + Ownership ($0) = $189.
Last reported payment date: 2024-08-23 • Largest payer in this snapshot: Amgen Inc. ($146).
Total Amount
$189
General + Research + Ownership
Payments
5
Total payment records
General Amount
$189
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-08-23
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Amgen Inc. | $146 |
| Insulet Corporation | $26 |
| GlaxoSmithKline, 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: 2004-09-08
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 |
|---|---|---|---|---|
| I20040908000575 | 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 |
|---|---|---|---|---|
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 280 | 89 | $0 |
| 99222 | Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 16 | 16 | $0 |
Insurance plans in this area (ZIP 91402)
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