TAMMY DARBY (PA-C) – Physician Assistant, NPI 1265828370
Physician Assistant
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
10,570 PHYSICIAN ASSISTANT in CA
Provider Addresses for TAMMY DARBY (PA-C)
2740 N GAREY AVE STE 100
POMONA, CA 917671800
Phone: (909) 623-2300
Fax: (909) 469-2472
Type: Location
1918 BUSINESS CENTER DR STE 110
SAN BERNARDINO, CA 924083471
Phone: (909) 890-5654
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 9 Open Payments records for all available years, with a total value of $200.
Total Amount is formed as General ($200) + Research ($0) + Ownership ($0) = $200.
Last reported payment date: 2024-10-25 • Largest payer in this snapshot: GlaxoSmithKline, LLC. ($40).
Total Amount
$200
General + Research + Ownership
Payments
9
Total payment records
General Amount
$200
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-10-25
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| GlaxoSmithKline, LLC. | $40 |
| Novartis Pharmaceuticals Corporation | $29 |
| Organon LLC | $26 |
| Amgen Inc. | $25 |
| PFIZER INC. | $22 |
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: 2023-10-10
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 |
|---|---|---|---|---|
| I20231010004092 | 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.
No Medicare fee-for-service utilization data available for this provider in our database.
Insurance plans in this area (ZIP 91767)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Clinical Psychologist | CA | |
| Physician Assistant | CA | |
| Physician Assistant | CA | |
| Family Practice | CA | |
| Clinical Social Worker | CA | |
| Family Practice | CA | |
| Family Practice, Internal Medicine | CA |
Reviews
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