BRIAN K GREENBERG (M.D.) – Pediatric Allergy/Immunology Physician, NPI 1821023201
Pediatric Allergy/Immunology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
Provider Addresses for BRIAN K GREENBERG (M.D.)
29525 Canwood St Ste 250
Agoura, CA 913014231
Phone: (818) 735-5555
Type: Location
24422 AVENIDA DE LA CARLOTA STE 300
LAGUNA HILLS, CA 926533628
Phone: (949) 599-2434
Fax: (949) 599-2430
Type: Mailing
18370, Burbank Boulevard, Tarzana Safari Walk, Tarzana, Los Angeles, Los Angeles County, California, 91356, United States
SUITE 307
TARZANA, CA 913562804
Phone: (818) 996-6000
Fax: (818) 996-4712
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 24 Open Payments records for all available years, with a total value of $11,191.
Total Amount is formed as General ($11,191) + Research ($0) + Ownership ($0) = $11,191.
Last reported payment date: 2024-08-15 • Largest payer in this snapshot: Henry Schein, Inc. ($10,752).
Total Amount
$11,191
General + Research + Ownership
Payments
24
Total payment records
General Amount
$11,191
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-08-15
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Henry Schein, Inc. | $10,752 |
| Merck Sharp & Dohme LLC | $73 |
| GlaxoSmithKline, LLC. | $58 |
| AstraZeneca Pharmaceuticals LP | $57 |
| Jubilant HollisterStier LLC | $45 |
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: 2020-06-22
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 |
|---|---|---|---|---|
| I20200622000798 | I | Allergy/Immunology | 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 91301)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| - | CA |
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