DR. KAMYAR KALANTAR-ZADEH (M.D.) – Nephrology Physician, NPI 1457314684
Nephrology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
1,405 NEPHROLOGY in CA
Provider Addresses for DR. KAMYAR KALANTAR-ZADEH (M.D.)
21840 NORMANDIE AVE
STE. 700
TORRANCE, CA 905022047
Phone: (310) 222-5101
Fax: (310) 320-5463
Type: Mailing
21840 Normandie Ave
Ste. 700
Torrance, CA 905022047
Phone: (310) 222-5101
Fax: (310) 320-5463
Type: Location
200 S MANCHESTER AVE STE 300
ORANGE, CA 928683219
Phone: (714) 456-2986
Type: Mailing
101 THE CITY DR S
ORANGE, CA 928683201
Phone: (714) 880-7812
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 26 Open Payments records for all available years, with a total value of $48,655.
Total Amount is formed as General ($48,655) + Research ($0) + Ownership ($0) = $48,655.
Last reported payment date: 2024-09-17 • Largest payer in this snapshot: Fresenius Kabi USA, LLC ($16,633).
Total Amount
$48,655
General + Research + Ownership
Payments
26
Total payment records
General Amount
$48,655
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-09-17
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Fresenius Kabi USA, LLC | $16,633 |
| GlaxoSmithKline, LLC. | $7,800 |
| Vifor (International) Ltd. | $6,500 |
| Fresenius USA Marketing, Inc. | $5,227 |
| SANOFI US SERVICES INC. | $4,575 |
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: 2011-02-02
PECOS data refreshed: 2026-06-15
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 |
|---|---|---|---|---|
| I20110202000479 | I | Nephrology | 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 |
|---|---|---|---|---|
| 99233 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 94 | 28 | $0 |
| 99215 | Established patient office or other outpatient visit, 40-54 minutes | 19 | 18 | $0 |
Insurance plans in this area (ZIP 90502)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Critical Care (Intensivists), Emergency Medicine, Internal Medicine | MO | |
| E N D O C R I N O L O G Y | CA | |
| Internal Medicine | CA | |
| - | CA | |
| - | CA | |
| Internal Medicine | CA | |
| - | CA | |
| Physician Assistant | CA | |
| - | CA | |
| - | CA |
Reviews
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