NPI registry status
Active
2026 NPPES data Medical Physician Assistant NPI 1962912428 PA
Verify on CMS → Siobhan Arey, PA
Medical Physician Assistant in Portsmouth, New Hampshire.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 40,527 in Medical 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
842
Medicare Part D claims · 390 beneficiaries · Medical Physician Assistant avg: 1K
Generic prescribing
91%
generic claims · 9% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$736.35
23 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
Siobhan Arey, PA filed 842 Medicare Part D claims in 2023 as a Medical Physician Assistant in Portsmouth, New Hampshire, prescribing 91% generic.
- 842
- Part D claims, 2023
- 91%
- generic prescribing
- $736.35
- industry payments (Sunshine Act)
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.
Siobhan Arey, PA's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
842 Top 27% higher than 73% of 1,370,886 prescribers
Each bar is a band; taller bars hold more prescribers. 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 Medicare Part D Prescriber Public Use File · 2023
What does the federal data show about Siobhan Arey, PA?
Quality data not reportedPrimary specialty
Medical Physician Assistant
Medicare Part D claims
842 22% vs specialty avg
Specialty distribution in New Hampshire
How Medical Physician Assistant compares to other specialties among New Hampshire providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Medical Physician Assistant. Verify directly:
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).
Siobhan Arey, PA appears in the CMS NPPES registry as a Medical Physician Assistant provider holding PA credentials at 330 BORTHWICK AVE STE 303, Portsmouth, NH, 03801, with a listed phone of (603) 431-5205. NPI 1962912428 was issued on 10/10/2017.
Medicare Part D records for calendar year 2023 show 842 prescription claims written by this provider, covering 390 Medicare beneficiaries and totaling roughly $454K in drug spend, split 9% brand-name and 91% generic by claim count.
Medical Physician Assistant is a mid-sized specialty nationwide, with 40,527 enrolled providers across 55 states and an average of 1,077 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 | 1962912428 |
|---|---|
| Specialty | Medical Physician Assistant |
| Credentials | PA |
| Gender | Female |
| NPI Issued | 10/10/2017 |
Hospital and facility affiliations
Facilities where Siobhan Arey, PA bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
Forefront Dermatology - New Hampshire, PLLC
Portsmouth, NH
Mercy Hospital
Gorham, ME
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
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 Siobhan Arey, PA. Source: openpaymentsdata.cms.gov.
Total received
$736
Largest payer
Janssen Biotech, Inc.
Most common payment type
Food and Beverage
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 · Generic-heavy
Siobhan Arey, PA - brand share 9.0%
Medical Physician Assistant average
9% brand-name claims vs 91% generic, on 842 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.
842
Total Claims
$454K
Total Drug Cost
390
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 971
- Total Day Supply
- 24,744
- Brand vs Generic
- 9% brand / 91% generic
- Brand Drug Cost
- $424K
- Generic Drug Cost
- $30K
- Antibiotic Claims
- 45
Patient Demographics
- Average Patient Age
- 73.9 years
- Avg HCC Risk Score
- 0.86
- Gender Split
- 57% female / 43% male
- Age Distribution
- <65: 17, 65-74: 206, 75-84: 132, 85+: 35
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Siobhan Arey, PA prescribes most
Top Medicare Part D drugs by claim count, 2023
- Ketoconazole
Ketoconazole
194 claims
- Triamcinolone Acet…
Triamcinolone Acetonide
132 claims
- Fluorouracil
Fluorouracil
90 claims
- Clobetasol Propion… 62
Clobetasol Propionate
62 claims
- Doxycycline Hyclate 25
Doxycycline Hyclate
25 claims
- Hydroxychloroquine… 22
Hydroxychloroquine Sulfate
22 claims
- Mupirocin 22
Mupirocin
22 claims
- Spironolactone 22
Spironolactone
22 claims
| Drug | Claims |
|---|---|
| Ketoconazole | 194 |
| Triamcinolone Acetonide | 132 |
| Fluorouracil | 90 |
| Clobetasol Propionate | 62 |
| Doxycycline Hyclate | 25 |
| Hydroxychloroquine Sulfate | 22 |
| Mupirocin | 22 |
| Spironolactone | 22 |
| Hydrocortisone | 19 |
| Dupixent Syringe Dupilumab | 18 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Medical Physician Assistant Overview
How Siobhan Arey, PA fits within the Medical Physician Assistant landscape nationally.
40,527
Medical Physician Assistant Providers in US
55
States with Medical Physician Assistant
1,077
Avg Claims per Provider
Siobhan Arey, PA's 842 claims are below the specialty average of 1,077.
Nearby Medical Physician Assistant Providers in New Hampshire
Other clinicians with the same primary specialty enrolled in New Hampshire, drawn from the same CMS NPPES roster as Arey.
Dr. Stacey Abaid
PA-C
Milford, NH
Dr. Kathleen Abladian
PA
Bedford, NH
Dr. Kenneth Adams
PA-C
Concord, NH
Dr. Josephine Adewumi
PA-C
Merrimack, NH
Dr. Allison Allen
P.A.
Portsmouth, NH
Compare Medical 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 Hampshire medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Medical 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.
Healthcare Guides
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How to Find a Doctor
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Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore New Hampshire
Frequently Asked Questions
What is Siobhan Arey, PA's specialty? ▼
Siobhan Arey, PA specializes in Medical Physician Assistant and practices in Portsmouth, New Hampshire. Credentials: PA.
How much does Siobhan Arey, PA prescribe under Medicare Part D? ▼
In 2023, Siobhan Arey, PA wrote 842 Medicare Part D claims totaling $454K in drug costs for 390 beneficiaries.
Where is Siobhan Arey, PA located? ▼
Siobhan Arey, PA is located at 330 BORTHWICK AVE STE 303, Portsmouth, NH, 03801. Phone: (603) 431-5205.
What is Siobhan Arey, PA's NPI number? ▼
Siobhan Arey, PA's National Provider Identifier (NPI) is 1962912428, issued on 10/10/2017.
Does Siobhan Arey, PA prescribe more brand-name or generic drugs? ▼
Siobhan Arey, PA's prescribing is 9% brand-name and 91% generic drugs by claim count, with $424K in brand drug costs.
How many Medical Physician Assistant providers are there in the US? ▼
There are 40,527 Medical Physician Assistant providers across 55 states in the US. The average Medical Physician Assistant provider writes 1,077 Medicare Part D claims per year.
What drugs does Siobhan Arey, PA prescribe most often? ▼
Based on 2023 Medicare Part D data, Siobhan Arey, PA's most frequently prescribed drugs include Ketoconazole, Triamcinolone Acetonide, Fluorouracil. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Siobhan Arey, PA accept Medicare? ▼
Siobhan Arey, PA appears in CMS Medicare data with 842 Part D claims and 390 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Siobhan Arey, PA's credentials? ▼
Siobhan Arey, PA's NPI is 1962912428 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.
- 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.