NPI registry status
Active
2026 NPPES data Neuromuscular Medicine (Psychiatry & Neurology) Physician NPI 1558402032 M.D.
Verify on CMS → Nizar Souayah, M.D.
Neuromuscular Medicine (Psychiatry & Neurology) Physician in Newark, New Jersey.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 338 in Neuromuscular Medicine (Psychiatry & Neurology) Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
506
Medicare Part D claims · 61 beneficiaries · Neuromuscular Medicine (Psychiatry & Neurology) Physician avg: 931
Generic prescribing
49%
generic claims · 51% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
73.3/100
▼ 10 pts below national avg 83.1 · Mid-tier
Industry payments
$44.6K
39 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Nizar Souayah, M.D. reported a CMS MIPS final score of 73.3/100 - below the 83.1 national average - and filed 506 Medicare Part D claims in 2023.
- 73.3/100
- MIPS score · -10 vs avg
- 506
- Part D claims, 2023
- 49%
- generic prescribing
- Likely
- board-certified (heuristic)
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Nizar Souayah, M.D.'s MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
73 11th percentile higher than 11% of 477,587 scored providers
Each bar is a band; taller bars hold more scored providers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Nizar Souayah, M.D. sits
This provider among neuromuscular medicine (psychiatry & neurology) physician peers
Across the 132 neuromuscular medicine (psychiatry & neurology) physician providers who report both Medicare Part D prescribing and a MIPS quality score, Nizar Souayah, M.D. writes more Part D claims than 39% of them and scores higher on MIPS quality than 6% - placing this provider in the lower-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one neuromuscular medicine (psychiatry & neurology) physician peer from a representative sample of 60; the gold marker is Nizar Souayah, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Nizar Souayah, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Nizar Souayah, M.D.?
Below national averagePrimary specialty
Neuromuscular Medicine (Psychiatry & Neurology) Physician
Medicare Part D claims
506 46% vs specialty avg
MIPS final score
73.3/100 9.8 pts vs avg
Specialty distribution in New Jersey
How Neuromuscular Medicine (Psychiatry & Neurology) Physician compares to other specialties among New Jersey providers
Medicare quality performance, MIPS
Nizar Souayah, M.D.'s 2023 MIPS final score plotted against the Neuromuscular Medicine (Psychiatry & Neurology) Physician national average
- MIPS Final Score
- 73.3/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Neuromuscular Medicine (Psychiatry & Neurology) Physician) - 73.3/100 vs national avg 83.1
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Nizar Souayah, M.D. appears in the CMS NPPES registry as a Neuromuscular Medicine (Psychiatry & Neurology) Physician provider holding M.D. credentials at 90 BERGEN ST, Newark, NJ, 07103, with a listed phone of (973) 972-2550. NPI 1558402032 was issued on 02/09/2007.
Medicare Part D records for calendar year 2023 show 506 prescription claims written by this provider, covering 61 Medicare beneficiaries and totaling roughly $3.7 million in drug spend, split 51% brand-name and 49% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 73.3/100 for the 2023 performance year (Quality 44.9, Cost 47.7), compared with the national average of 83.1.
Neuromuscular Medicine (Psychiatry & Neurology) Physician is a narrow specialty nationwide, with 338 enrolled providers across 44 states and an average of 931 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline.
Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.
Practice Address
Provider Details
| NPI | 1558402032 |
|---|---|
| Specialty | Neuromuscular Medicine (Psychiatry & Neurology) Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 02/09/2007 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
73.2773
Final Score
Avg: 83.1
44.8928
Quality
47.6995
Cost
83
Promoting Interoperability
Reporting: Group practice
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Nizar Souayah, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$44.6K
Largest payer
Takeda Pharmaceuticals U.S.A., Inc.
Most common payment type
Travel and Lodging
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
Brand vs generic prescribing mix · Brand-heavy
Nizar Souayah, M.D. - brand share 51.0%
Neuromuscular Medicine (Psychiatry & Neurology) Physician average
51% brand-name claims vs 49% generic, on 506 2023 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
506
Total Claims
$3.7M
Total Drug Cost
61
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 597
- Total Day Supply
- 16,304
- Brand vs Generic
- 51% brand / 49% generic
- Brand Drug Cost
- $3.7M
- Generic Drug Cost
- $18K
Patient Demographics
- Average Patient Age
- 65.4 years
- Avg HCC Risk Score
- 1.64
- Gender Split
- 56% female / 44% male
- Age Distribution
- <65: 23, 65-74: 22, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Nizar Souayah, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Radicava Ors
Radicava Ors
62 claims
- Prednisone
Prednisone
53 claims
- Pyridostigmine Bro…
Pyridostigmine Bromide
36 claims
- Relyvrio
Relyvrio
34 claims
- Gamunex-C
Gamunex-C
28 claims
- Gabapentin
Gabapentin
27 claims
- Riluzole
Riluzole
27 claims
- Gammagard Liquid
Gammagard Liquid
25 claims
| Drug | Claims |
|---|---|
| Radicava Ors Edaravone | 62 |
| Prednisone | 53 |
| Pyridostigmine Bromide | 36 |
| Relyvrio Sod Phenylbutyrat/Taurursodiol | 34 |
| Gamunex-C Immune Globul G/Gly/Iga Avg 46 | 28 |
| Gabapentin | 27 |
| Riluzole | 27 |
| Gammagard Liquid Immun Glob G(Igg)/Gly/Iga Ov50 | 25 |
| Vyvgart Efgartigimod Alfa-Fcab | 21 |
| Mycophenolate Mofetil | 20 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Neuromuscular Medicine (Psychiatry & Neurology) Physician in NJ →
All providers in New Jersey →
Compare specialties →
Neuromuscular Medicine (Psychiatry & Neurology) Physician Overview
How Nizar Souayah, M.D. fits within the Neuromuscular Medicine (Psychiatry & Neurology) Physician landscape nationally.
338
Neuromuscular Medicine (Psychiatry & Neurology) Physician Providers in US
44
States with Neuromuscular Medicine (Psychiatry & Neurology) Physician
931
Avg Claims per Provider
Nizar Souayah, M.D.'s 506 claims are below the specialty average of 931.
Nearby Neuromuscular Medicine (Psychiatry & Neurology) Physician Providers in New Jersey
Other clinicians with the same primary specialty enrolled in New Jersey, drawn from the same CMS NPPES roster as Souayah.
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the New Jersey medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Neuromuscular Medicine (Psychiatry & Neurology) Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Frequently Asked Questions
What is Nizar Souayah, M.D.'s specialty? ▼
Nizar Souayah, M.D. specializes in Neuromuscular Medicine (Psychiatry & Neurology) Physician and practices in Newark, New Jersey. Credentials: M.D..
How much does Nizar Souayah, M.D. prescribe under Medicare Part D? ▼
In 2023, Nizar Souayah, M.D. wrote 506 Medicare Part D claims totaling $3.7M in drug costs for 61 beneficiaries.
What is Nizar Souayah, M.D.'s Medicare quality score? ▼
Nizar Souayah, M.D. has a CMS MIPS Final Score of 73.3/100 (Quality: 44.9, Cost: 47.7). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Nizar Souayah, M.D. located? ▼
Nizar Souayah, M.D. is located at 90 BERGEN ST, Newark, NJ, 07103. Phone: (973) 972-2550.
What is Nizar Souayah, M.D.'s NPI number? ▼
Nizar Souayah, M.D.'s National Provider Identifier (NPI) is 1558402032, issued on 02/09/2007.
Does Nizar Souayah, M.D. prescribe more brand-name or generic drugs? ▼
Nizar Souayah, M.D.'s prescribing is 51% brand-name and 49% generic drugs by claim count, with $3.7M in brand drug costs.
How many Neuromuscular Medicine (Psychiatry & Neurology) Physician providers are there in the US? ▼
There are 338 Neuromuscular Medicine (Psychiatry & Neurology) Physician providers across 44 states in the US. The average Neuromuscular Medicine (Psychiatry & Neurology) Physician provider writes 931 Medicare Part D claims per year.
What drugs does Nizar Souayah, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Nizar Souayah, M.D.'s most frequently prescribed drugs include Radicava Ors, Prednisone, Pyridostigmine Bromide. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Nizar Souayah, M.D. accept Medicare? ▼
Nizar Souayah, M.D. appears in CMS Medicare data with 506 Part D claims and 61 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Nizar Souayah, M.D.'s credentials? ▼
Nizar Souayah, M.D.'s NPI is 1558402032 with credentials M.D.. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Compiled from official public sources by the PlainDoctor editorial team.