Nizar Souayah, M.D.
NPI 1558402032 · Neurology Physician · Newark, NJ
Enrolled with Medicare as Practitioner - Neurology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nizar Souayah, M.D. is a Neurology Physician provider in Newark, NJ (NPI 1558402032).
Provider details
- NPI number
- 1558402032
- Entity type
- Individual
- Primary specialty
- Neurology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 25MA07746800 (NJ)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
14 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Initial Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 40 Minutes99221 | 14 | $87 |
Typical Medicare-allowed amounts for these services range $87–$87 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 10 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Immun Glob G(igg)/Gly/Iga Ov50brand: Gammagard Liquid | 47 |
| Edaravonebrand: Radicava Ors | 45 |
| Prednisone | 43 |
| Immune Globul G/Gly/Iga Avg 46brand: Gammaked | 25 |
| Gabapentin | 24 |
| Immune Globul G/Gly/Iga Avg 46brand: Gamunex-C | 22 |
| Immun Glob G(igg)/Pro/Iga 0-50brand: Privigen | 18 |
| Pyridostigmine Bromide | 18 |
| Immun Glob G(igg)-Ifas/Glycine |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$44,586 across 39 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-02-09
- Last updated
- 2024-04-10
- Certified
- 2024-04-10
Frequently asked questions
- What is Nizar Souayah's NPI number?
- Nizar Souayah's National Provider Identifier (NPI) is 1558402032, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nizar Souayah's specialty?
- Nizar Souayah is listed in the NPPES registry with a primary specialty of Neurology Physician (Allopathic & Osteopathic Physicians).
- Where is Nizar Souayah located?
- Nizar Souayah's practice location on file with NPPES is 90 Bergen St, Newark, NJ 07103-2425.
- What is Nizar Souayah's phone number?
- The practice phone number listed in the NPPES registry for Nizar Souayah is (973) 972-2550.
- Does Nizar Souayah accept Medicare?
- Nizar Souayah is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nizar Souayah's NPI active?
- Yes — Nizar Souayah's NPI (1558402032) is active in the NPPES registry as of the last update on 2024-04-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.