NPI registry status
Active
2026 NPPES data Physician Assistant NPI 1043859267 PA-C
Verify on CMS → Riley Willman, PA-C
Physician Assistant in Scottsdale, Arizona.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 149,975 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
619
Medicare Part D claims · 213 beneficiaries · Physician Assistant avg: 790
Industry payments
$2.3K
97 payments · CMS Open Payments (Sunshine Act)
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Riley Willman, PA-C filed 619 Medicare Part D claims in 2023 as a Physician Assistant in Scottsdale, Arizona.
- 619
- Part D claims, 2023
- $2.3K
- 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.
Riley Willman, PA-C's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
619 Top 31% higher than 69% 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 Riley Willman, PA-C?
Quality data not reportedPrimary specialty
Physician Assistant
Medicare Part D claims
619 22% vs specialty avg
Specialty distribution in Arizona
How Physician Assistant compares to other specialties among Arizona 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 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).
Riley Willman, PA-C appears in the CMS NPPES registry as a Physician Assistant provider holding PA-C credentials at 13860 N NORTHSIGHT BLVD, Scottsdale, AZ, 85260, with a listed phone of (602) 734-0252. NPI 1043859267 was issued on 01/06/2020.
Medicare Part D records for calendar year 2023 show 619 prescription claims written by this provider, covering 213 Medicare beneficiaries and totaling roughly $89K in drug spend.
Physician Assistant is a high-volume specialty nationwide, with 149,975 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 | 1043859267 |
|---|---|
| Specialty | Physician Assistant |
| Credentials | PA-C |
| Gender | Female |
| NPI Issued | 01/06/2020 |
Hospital and facility affiliations
Facilities where Riley Willman, PA-C 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.
Arizona Asthma Allergy Legacy PLC
Avondale, AZ
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 Riley Willman, PA-C. Source: openpaymentsdata.cms.gov.
Total received
$2.3K
Largest payer
AstraZeneca Pharmaceuticals LP
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.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
619
Total Claims
$89K
Total Drug Cost
213
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 952
- Total Day Supply
- 24,412
- Generic Drug Cost
- $12K
- Antibiotic Claims
- 83
Patient Demographics
- Average Patient Age
- 71.5 years
- Avg HCC Risk Score
- 1.23
- Gender Split
- 76% female / 24% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Riley Willman, PA-C prescribes most
Top Medicare Part D drugs by claim count, 2023
- Montelukast Sodium
Montelukast Sodium
78 claims
- Prednisone
Prednisone
60 claims
- Azelastine Hcl
Azelastine Hcl
59 claims
- Levocetirizine Dih…
Levocetirizine Dihydrochloride
50 claims
- Albuterol Sulfate … 29
Albuterol Sulfate Hfa
29 claims
- Azithromycin 29
Azithromycin
29 claims
- Amoxicillin-Clavul… 28
Amoxicillin-Clavulanate Potass
28 claims
- Symbicort 27
Symbicort
27 claims
| Drug | Claims |
|---|---|
| Montelukast Sodium | 78 |
| Prednisone | 60 |
| Azelastine Hcl | 59 |
| Levocetirizine Dihydrochloride | 50 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 29 |
| Azithromycin | 29 |
| Amoxicillin-Clavulanate Potass Amoxicillin/Potassium Clav | 28 |
| Symbicort Budesonide/Formoterol Fumarate | 27 |
| Ipratropium Bromide | 24 |
| Fluticasone Propionate | 20 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Physician Assistant Overview
How Riley Willman, PA-C fits within the Physician Assistant landscape nationally.
149,975
Physician Assistant Providers in US
56
States with Physician Assistant
790
Avg Claims per Provider
Riley Willman, PA-C's 619 claims are below the specialty average of 790.
Nearby Physician Assistant Providers in Arizona
Other clinicians with the same primary specialty enrolled in Arizona, drawn from the same CMS NPPES roster as Willman.
Dr. Allison Abbey
PA-C
Cottonwood, AZ
Dr. Carley Abbott
PA-C
Chandler, AZ
Dr. Delmas Abbott
PA-C
Prescott, AZ
Dr. Sarah Abbott
PA
Phoenix, AZ
Dr. Kristen Abel
PA-C
Mesa, AZ
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 Arizona 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.
Healthcare Guides
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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 Arizona
Frequently Asked Questions
What is Riley Willman, PA-C's specialty? ▼
Riley Willman, PA-C specializes in Physician Assistant and practices in Scottsdale, Arizona. Credentials: PA-C.
How much does Riley Willman, PA-C prescribe under Medicare Part D? ▼
In 2023, Riley Willman, PA-C wrote 619 Medicare Part D claims totaling $89K in drug costs for 213 beneficiaries.
Where is Riley Willman, PA-C located? ▼
Riley Willman, PA-C is located at 13860 N NORTHSIGHT BLVD, Scottsdale, AZ, 85260. Phone: (602) 734-0252.
What is Riley Willman, PA-C's NPI number? ▼
Riley Willman, PA-C's National Provider Identifier (NPI) is 1043859267, issued on 01/06/2020.
How many Physician Assistant providers are there in the US? ▼
There are 149,975 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 Riley Willman, PA-C prescribe most often? ▼
Based on 2023 Medicare Part D data, Riley Willman, PA-C's most frequently prescribed drugs include Montelukast Sodium, Prednisone, Azelastine Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Riley Willman, PA-C accept Medicare? ▼
Riley Willman, PA-C appears in CMS Medicare data with 619 Part D claims and 213 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Riley Willman, PA-C's credentials? ▼
Riley Willman, PA-C's NPI is 1043859267 with credentials PA-C. 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.