DR. NOLLI SILVA RIORDAN (M.D.) – Surgery Physician, NPI 1124110192
Surgery Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
3,317 GENERAL SURGERY in CA
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Provider Addresses for DR. NOLLI SILVA RIORDAN (M.D.)
1320, El Capitan Drive, Danville, Contra Costa County, California, 94526, United States
STE 120
DANVILLE, CA 945266260
Phone: (925) 676-2600
Fax: (925) 680-0212
Type: Mailing
1000;1002;1004, Central Avenue, Gold Coast, Alameda, Alameda County, California, 94501, United States
ALAMEDA, CA 945012306
Phone: (510) 521-6078
Fax: (510) 521-6079
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 3 Open Payments records for all available years, with a total value of $97.
Total Amount is formed as General ($97) + Research ($0) + Ownership ($0) = $97.
Last reported payment date: 2023-06-01 • Largest payer in this snapshot: Abbott Laboratories ($57).
Total Amount
$97
General + Research + Ownership
Payments
3
Total payment records
General Amount
$97
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2023-06-01
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Abbott Laboratories | $57 |
| ATRICURE, INC. | $40 |
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: 2008-06-18
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 |
|---|---|---|---|---|
| I20080618000313 | I | General Surgery | 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.
No Medicare fee-for-service utilization data available for this provider in our database.
Insurance plans in this area (ZIP 94526)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Thoracic Surgery, Cardiac Surgery | CA | |
| Cardiac Surgery, Thoracic Surgery | CA | |
| General Surgery, Colorectal Surgery (Proctology) | CA | |
| O T O L A R Y N G O L O G Y | CA | |
| Cardiac Surgery, Thoracic Surgery, Vascular Surgery | CA | |
| Vascular Surgery, Thoracic Surgery | CA | |
| Cardiac Surgery, Thoracic Surgery | CA | |
| Vascular Surgery | CA | |
| Thoracic Surgery | CA | |
| Otolaryngology, Plastic And Reconstructive Surgery | CA |
Reviews
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