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 40,694 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
337
Medicare Part D claims · 157 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, 2024
What the federal data shows
Siobhan Arey, PA filed 337 Medicare Part D claims in 2024 as a Medical Physician Assistant in Portsmouth, New Hampshire, prescribing 91% generic.
- 337
- Part D claims, 2024
- 91%
- generic prescribing
- $736.35
- industry payments (Sunshine Act)
- ≥56th
- pct by Part D claim volume (lower-bound band)
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.
Federal trust snapshot
What official records show about Siobhan Arey, PA
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1962912428), first enumerated 10/10/2017.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 337 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Hospital affiliations
2 CMS Care Compare hospital affiliations on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Reported
Industry payment transparency
$736.35 in reported industry payments (23 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
Compare Arey with other Medical Physician Assistant providers
Same primary specialty, same federal CMS NPPES roster.
Also enrolled in New Hampshire
- Stacey Abaid, PA-C Milford, NH
- Kathleen Abladian, PA Bedford, NH
- Kenneth Adams, PA-C Concord, NH
- Josephine Adewumi, PA-C Merrimack, NH
- Allison Allen, P.A. Portsmouth, NH
- Philippe Andre, PA-C Barrington, NH
Other specialties in Portsmouth: Mental Health Counselor (154) · Counselor (119) · Student in an Organized Health Care Education/Training Program (108) · Behavior Analyst (104)
CMS NPPES provider registry desk
NPI 1962912428 · Medical Physician Assistant
NPI-10 · ENUM-RECENT · TAX-MID · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1962912428
- ENUM-RECENT 2017
- TAX-MID 41K Medical Physician
- RX-LIGHT 337
- BOOK-THIN 250 in New Hampshire
- PHOTO-ENUM Lindsey Anderson, PA-C · 2017
Siobhan Arey, PA's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
337 ≥ 56th percentile 56% of 1,416,883 prescribers are in lower value bands
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.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2024
What does the federal data show about Siobhan Arey, PA?
Quality data not reportedPrimary specialty
Medical Physician Assistant
Medicare Part D claims
337 70% 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).
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 337 2024 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 2024.
337
Total Claims
$217K
Total Drug Cost
157
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 370.867
- Total Day Supply
- 9,269
- Brand vs Generic
- 9% brand / 91% generic
- Brand Drug Cost
- $210K
- Generic Drug Cost
- $7K
- Antibiotic Claims
- 44
Patient Demographics
- Average Patient Age
- 72.9 years
- Avg HCC Risk Score
- 1.00
- Gender Split
- 59% female / 41% male
- Age Distribution
- <65: 12, 65-74: 87, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Siobhan Arey, PA prescribes most
Top Medicare Part D drugs by claim count, 2024
- Clobetasol Propion…
Clobetasol Propionate
51 claims
- Ketoconazole
Ketoconazole
48 claims
- Triamcinolone Acet…
Triamcinolone Acetonide
42 claims
- Doxycycline Hyclate 18
Doxycycline Hyclate
18 claims
- Tacrolimus 16
Tacrolimus
16 claims
- Doxycycline Monohy… 14
Doxycycline Monohydrate
14 claims
- Fluorouracil 14
Fluorouracil
14 claims
| Drug | Claims |
|---|---|
| Clobetasol Propionate | 51 |
| Ketoconazole | 48 |
| Triamcinolone Acetonide | 42 |
| Doxycycline Hyclate | 18 |
| Tacrolimus | 16 |
| Doxycycline Monohydrate | 14 |
| Fluorouracil | 14 |
* 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.
40,694
Medical Physician Assistant Providers in US
55
States with Medical Physician Assistant
1,139
Avg Claims per Provider
Siobhan Arey, PA's 337 claims are below the specialty average of 1,139.
Nationwide Medical Physician Assistant peers with similar MIPS or enrollment year
Two federal-record peer sets for Arey, both outside New Hampshire so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2017)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
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.
One of 250 Medical Physician Assistant providers enrolled in New Hampshire, 11 are shown on this page.
William Argie
PA-C
Keene, NH
Sharon Rose Arokia Raja
Nashua, NH
Emily Auger
PA
Bedford, NH
Michael Bacotti
PA-C
Concord, NH
Mary Baillargeon
MPAS
Hooksett, NH
Compare Medical Physician Assistant nationally: see state-by-state distribution →
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 2024, Siobhan Arey, PA wrote 337 Medicare Part D claims totaling $217K in drug costs for 157 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 $210K in brand drug costs.
How many Medical Physician Assistant providers are there in the US? ▼
There are 40,694 Medical Physician Assistant providers across 55 states in the US. The average Medical Physician Assistant provider writes 1,139 Medicare Part D claims per year.
What drugs does Siobhan Arey, PA prescribe most often? ▼
Based on 2024 Medicare Part D data, Siobhan Arey, PA's most frequently prescribed drugs include Clobetasol Propionate, Ketoconazole, Triamcinolone Acetonide. 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 337 Part D claims and 157 Medicare beneficiaries in 2024. 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 (2024). 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 August 2026 (NPPES) / 2024 (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
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 August 2026.