NPI registry status
Active
2026 NPPES data Physician Assistant NPI 1265946222 PA
Verify on CMS → Louis Diamond, PA
Physician Assistant in Bergenfield, 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 150,974 in Physician Assistant, 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
471
Medicare Part D claims · 378 beneficiaries · Physician Assistant avg: 790
Generic prescribing
91%
generic claims · 9% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
46.3/100
▼ 37 pts below national avg 83.1 · Below average
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
Louis Diamond, PA reported a CMS MIPS final score of 46.3/100 - below the 83.1 national average - and filed 471 Medicare Part D claims in 2023.
- 46.3/100
- MIPS score · -37 vs avg
- 471
- Part D claims, 2023
- 91%
- generic prescribing
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.
Louis Diamond, PA's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
46 4th percentile higher than 4% 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 Louis Diamond, PA sits
This provider among physician assistant peers
Across the 27,054 physician assistant providers who report both Medicare Part D prescribing and a MIPS quality score, Louis Diamond, PA writes more Part D claims than 67% of them and scores higher on MIPS quality than 1% - placing this provider in the high-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 physician assistant peer from a representative sample of 60; the gold marker is Louis Diamond, PA. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
What does the federal data show about Louis Diamond, PA?
Below national averagePrimary specialty
Physician Assistant
Medicare Part D claims
471 40% vs specialty avg
MIPS final score
46.3/100 36.8 pts vs avg
Specialty distribution in New Jersey
How Physician Assistant compares to other specialties among New Jersey providers
Medicare quality performance, MIPS
Louis Diamond, PA's 2023 MIPS final score plotted against the Physician Assistant national average
- MIPS Final Score
- 46.3/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Physician Assistant) - 46.3/100 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).
Louis Diamond, PA appears in the CMS NPPES registry as a Physician Assistant provider holding PA credentials at 19 S WASHINGTON AVE, Bergenfield, NJ, 07621, with a listed phone of (201) 387-0177. NPI 1265946222 was issued on 11/28/2017.
Medicare Part D records for calendar year 2023 show 471 prescription claims written by this provider, covering 378 Medicare beneficiaries and totaling roughly $7K in drug spend, split 9% brand-name and 91% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 46.3/100 for the 2023 performance year (Quality 51, Cost 60.8), compared with the national average of 83.1.
Physician Assistant is a high-volume specialty nationwide, with 150,974 enrolled providers across 56 states and an average of 790 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 | 1265946222 |
|---|---|
| Specialty | Physician Assistant |
| Credentials | PA |
| Gender | Male |
| NPI Issued | 11/28/2017 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
46.3147
Final Score
Avg: 83.1
51.0381
Quality
60.8125
Cost
Reporting: Group practice
Brand vs generic prescribing mix · Generic-heavy
Louis Diamond, PA - brand share 9.0%
Physician Assistant average
9% brand-name claims vs 91% generic, on 471 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.
471
Total Claims
$7K
Total Drug Cost
378
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 473
- Total Day Supply
- 5,705
- Brand vs Generic
- 9% brand / 91% generic
- Brand Drug Cost
- $1K
- Generic Drug Cost
- $6K
- Antibiotic Claims
- 234
Patient Demographics
- Average Patient Age
- 76.3 years
- Avg HCC Risk Score
- 1.18
- Gender Split
- 68% female / 32% male
- Age Distribution
- <65: 14, 65-74: 132, 75-84: 180, 85+: 52
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Louis Diamond, PA prescribes most
Top Medicare Part D drugs by claim count, 2023
- Azelastine Hcl
Azelastine Hcl
102 claims
- Amoxicillin-Clavul…
Amoxicillin-Clavulanate Potass
70 claims
- Nitrofurantoin Mon…
Nitrofurantoin Mono-Macro
65 claims
- Methylprednisolone 35
Methylprednisolone
35 claims
- Doxycycline Hyclate 31
Doxycycline Hyclate
31 claims
- Cephalexin 29
Cephalexin
29 claims
- Azithromycin 23
Azithromycin
23 claims
- Oseltamivir Phosph… 15
Oseltamivir Phosphate
15 claims
| Drug | Claims |
|---|---|
| Azelastine Hcl | 102 |
| Amoxicillin-Clavulanate Potass Amoxicillin/Potassium Clav | 70 |
| Nitrofurantoin Mono-Macro Nitrofurantoin Monohyd/M-Cryst | 65 |
| Methylprednisolone | 35 |
| Doxycycline Hyclate | 31 |
| Cephalexin | 29 |
| Azithromycin | 23 |
| Oseltamivir Phosphate | 15 |
| Ciprofloxacin Hcl | 14 |
| Naproxen | 12 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Physician Assistant Overview
How Louis Diamond, PA fits within the Physician Assistant landscape nationally.
150,974
Physician Assistant Providers in US
56
States with Physician Assistant
790
Avg Claims per Provider
Louis Diamond, PA's 471 claims are below the specialty average of 790.
Nearby Physician Assistant Providers in New Jersey
Other clinicians with the same primary specialty enrolled in New Jersey, drawn from the same CMS NPPES roster as Diamond.
Dr. Ann Marie Abadeer
PA-C, MHS
Ramsey, NJ
Sydney Abajian
Wayne, NJ
Dr. Ann Abbate
PA-C
Freehold, NJ
Diana Abbate
Marlboro, NJ
Nisreen Abdelaziz
Hoboken, NJ
Compare Physician Assistant nationally: see state-by-state distribution →
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 Physician Assistant 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 Louis Diamond, PA's specialty? ▼
Louis Diamond, PA specializes in Physician Assistant and practices in Bergenfield, New Jersey. Credentials: PA.
How much does Louis Diamond, PA prescribe under Medicare Part D? ▼
In 2023, Louis Diamond, PA wrote 471 Medicare Part D claims totaling $7K in drug costs for 378 beneficiaries.
What is Louis Diamond, PA's Medicare quality score? ▼
Louis Diamond, PA has a CMS MIPS Final Score of 46.3/100 (Quality: 51, Cost: 60.8). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Louis Diamond, PA located? ▼
Louis Diamond, PA is located at 19 S WASHINGTON AVE, Bergenfield, NJ, 07621. Phone: (201) 387-0177.
What is Louis Diamond, PA's NPI number? ▼
Louis Diamond, PA's National Provider Identifier (NPI) is 1265946222, issued on 11/28/2017.
Does Louis Diamond, PA prescribe more brand-name or generic drugs? ▼
Louis Diamond, PA's prescribing is 9% brand-name and 91% generic drugs by claim count, with $1K in brand drug costs.
How many Physician Assistant providers are there in the US? ▼
There are 150,974 Physician Assistant providers across 56 states in the US. The average Physician Assistant provider writes 790 Medicare Part D claims per year.
What drugs does Louis Diamond, PA prescribe most often? ▼
Based on 2023 Medicare Part D data, Louis Diamond, PA's most frequently prescribed drugs include Azelastine Hcl, Amoxicillin-Clavulanate Potass, Nitrofurantoin Mono-Macro. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Louis Diamond, PA accept Medicare? ▼
Louis Diamond, PA appears in CMS Medicare data with 471 Part D claims and 378 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Louis Diamond, PA's credentials? ▼
Louis Diamond, PA's NPI is 1265946222 with credentials PA. 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.