ZAHRA TABASSIAN (MD) – Nephrology Physician, NPI 1871521716
Nephrology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
21,511 INTERNAL MEDICINE in CA
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Provider Addresses for ZAHRA TABASSIAN (MD)
PO BOX 661
EL SEGUNDO, CA 902450661
Phone: (310) 671-2420
Fax: (310) 330-5670
Type: Mailing
994, South La Brea Avenue, Inglewood, Los Angeles County, California, 90301, United States
INGLEWOOD, CA 903013816
Phone: (310) 671-2420
Fax: (310) 330-5670
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 $1,097.
Total Amount is formed as General ($1,097) + Research ($0) + Ownership ($0) = $1,097.
Last reported payment date: 2024-11-20 • Largest payer in this snapshot: Boehringer Ingelheim Pharmaceuticals, Inc. ($377).
Total Amount
$1,097
General + Research + Ownership
Payments
26
Total payment records
General Amount
$1,097
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-11-20
Latest reported date
Top Companies
Largest payers in this snapshot
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: 2011-12-13
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 |
|---|---|---|---|---|
| I20111213000227 | 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 |
|---|---|---|---|---|
| 99291 | Critical care, first 30-74 minutes | 2,091 | 23 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 100 | 25 | $0 |
| 99223 | Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 29 | 19 | $0 |
Insurance plans in this area (ZIP 90245)
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