JIAN A CHEN (M.D.) – Internal Medicine Physician, NPI 1679568612
Internal Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
21,511 INTERNAL MEDICINE in CA
Loading map...
Provider Addresses for JIAN A CHEN (M.D.)
243, March Street, Santa Paula, Ventura County, California, 93060, United States
SANTA PAULA, CA 930602511
Phone: (805) 525-7131
Type: Mailing
3400 DATA DR
RANCHO CORDOVA, CA 956707956
Phone:
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
Loading prescription activity...
Open Payments (CMS)
CMS reports 32 Open Payments records for all available years, with a total value of $782.
Total Amount is formed as General ($782) + Research ($0) + Ownership ($0) = $782.
Last reported payment date: 2024-12-18 • Largest payer in this snapshot: Novo Nordisk Inc ($179).
Total Amount
$782
General + Research + Ownership
Payments
32
Total payment records
General Amount
$782
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 |
|---|---|
| Novo Nordisk Inc | $179 |
| Amgen Inc. | $168 |
| Mannkind Corporation | $113 |
| Abbott Laboratories | $54 |
| ABBVIE INC. | $30 |
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: 2010-02-03
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 |
|---|---|---|---|---|
| I20100203000519 | 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 |
|---|---|---|---|---|
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 516 | 203 | $0 |
| G0439 | Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 171 | 171 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 149 | 99 | $0 |
| G0444 | Annual depression screening, 5 to 15 minutes | 60 | 60 | $0 |
| G0008 | Administration of influenza virus vaccine | 45 | 43 | $0 |
Insurance plans in this area (ZIP 93060)
Loading plans...
Group practice members
| Name | Specialty | State |
|---|---|---|
| Family Practice | CA | |
| - | CA | |
| Internal Medicine | CA | |
| N E U R O L O G Y | CA | |
| - | CA | |
| - | CA | |
| - | CA | |
| Family Practice | CA | |
| Diagnostic Radiology | CA | |
| - | CA |
Reviews
All reviews are moderated before publication. Reviews reflect users' opinions; we do not verify the accuracy of individual reviews.
No reviews yet. Be the first to share your experience — your opinion helps families compare providers.