NPI registry status
Active
2026 NPPES data Surgical Physician Assistant NPI 1730841107 PA-C
Verify on CMS → Michael Walker, PA-C
Surgical 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 16,119 in Surgical 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
220
Medicare Part D claims · 50 beneficiaries · Surgical Physician Assistant avg: 316
Generic prescribing
67%
generic claims · 33% brand-name · higher generic rates reduce patient out-of-pocket costs
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
Michael Walker, PA-C filed 220 Medicare Part D claims in 2023 as a Surgical Physician Assistant in Scottsdale, Arizona, prescribing 67% generic.
- 220
- Part D claims, 2023
- 67%
- 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.
Michael Walker, PA-C's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
220 49th percentile higher than 49% 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 Michael Walker, PA-C?
Quality data not reportedPrimary specialty
Surgical Physician Assistant
Medicare Part D claims
220 30% vs specialty avg
Specialty distribution in Arizona
How Surgical 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 Surgical 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).
Michael Walker, PA-C appears in the CMS NPPES registry as a Surgical Physician Assistant provider holding PA-C credentials at 13400 E SHEA BLVD, Scottsdale, AZ, 85259, with a listed phone of (480) 301-8000. NPI 1730841107 was issued on 10/12/2021.
Medicare Part D records for calendar year 2023 show 220 prescription claims written by this provider, covering 50 Medicare beneficiaries and totaling roughly $251K in drug spend, split 33% brand-name and 67% generic by claim count, with an opioid prescribing rate of 8.2%.
Surgical Physician Assistant is a mid-sized specialty nationwide, with 16,119 enrolled providers across 54 states and an average of 316 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 | 1730841107 |
|---|---|
| Specialty | Surgical Physician Assistant |
| Credentials | PA-C |
| Gender | Male |
| NPI Issued | 10/12/2021 |
Hospital and facility affiliations
Facilities where Michael Walker, 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.
Mayo Clinic Arizona
Scottsdale, 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).
Brand vs generic prescribing mix · Above average
Michael Walker, PA-C - brand share 33.0%
Surgical Physician Assistant average
33% brand-name claims vs 67% generic, on 220 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.
220
Total Claims
$251K
Total Drug Cost
50
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 263
- Total Day Supply
- 6,216
- Brand vs Generic
- 33% brand / 67% generic
- Brand Drug Cost
- $95K
- Generic Drug Cost
- $156K
- Opioid Claims
- 18 (8.2% rate)
Patient Demographics
- Average Patient Age
- 59.9 years
- Avg HCC Risk Score
- 1.75
- Age Distribution
- <65: 28, 65-74: 16, 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 Michael Walker, PA-C prescribes most
Top Medicare Part D drugs by claim count, 2023
- Trulicity
Trulicity
61 claims
- Ursodiol
Ursodiol
37 claims
- Ondansetron Odt 17
Ondansetron Odt
17 claims
- Scopolamine 16
Scopolamine
16 claims
- Ondansetron Hcl 14
Ondansetron Hcl
14 claims
- Oxycodone Hcl 13
Oxycodone Hcl
13 claims
| Drug | Claims |
|---|---|
| Trulicity Dulaglutide | 61 |
| Ursodiol | 37 |
| Ondansetron Odt Ondansetron | 17 |
| Scopolamine | 16 |
| Ondansetron Hcl | 14 |
| Oxycodone Hcl | 13 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Surgical Physician Assistant Overview
How Michael Walker, PA-C fits within the Surgical Physician Assistant landscape nationally.
16,119
Surgical Physician Assistant Providers in US
54
States with Surgical Physician Assistant
316
Avg Claims per Provider
Michael Walker, PA-C's 220 claims are below the specialty average of 316.
Nearby Surgical Physician Assistant Providers in Arizona
Other clinicians with the same primary specialty enrolled in Arizona, drawn from the same CMS NPPES roster as Walker.
Dr. Christopher Adams
PA
Tucson, AZ
Dr. Franchesca Alexander
P.A.-C
Mesa, AZ
Dr. Regan Alford
PAC
Phoenix, AZ
Dr. Aaron Allen
MD, SA-C
Gilbert, AZ
Dr. Diana Allen
PA-C
Tucson, AZ
Compare Surgical 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 Surgical 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
Learn more about finding, verifying, and understanding healthcare providers.
How to Find a Doctor
Step-by-step guide to choosing a provider
Verify Credentials
Check NPI, board certification & license status
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 Michael Walker, PA-C's specialty? ▼
Michael Walker, PA-C specializes in Surgical Physician Assistant and practices in Scottsdale, Arizona. Credentials: PA-C.
How much does Michael Walker, PA-C prescribe under Medicare Part D? ▼
In 2023, Michael Walker, PA-C wrote 220 Medicare Part D claims totaling $251K in drug costs for 50 beneficiaries.
Where is Michael Walker, PA-C located? ▼
Michael Walker, PA-C is located at 13400 E SHEA BLVD, Scottsdale, AZ, 85259. Phone: (480) 301-8000.
What is Michael Walker, PA-C's NPI number? ▼
Michael Walker, PA-C's National Provider Identifier (NPI) is 1730841107, issued on 10/12/2021.
Does Michael Walker, PA-C prescribe more brand-name or generic drugs? ▼
Michael Walker, PA-C's prescribing is 33% brand-name and 67% generic drugs by claim count, with $95K in brand drug costs.
Does Michael Walker, PA-C prescribe opioids? ▼
Yes, Michael Walker, PA-C had 18 opioid claims in 2023 with an opioid prescribing rate of 8.2%.
How many Surgical Physician Assistant providers are there in the US? ▼
There are 16,119 Surgical Physician Assistant providers across 54 states in the US. The average Surgical Physician Assistant provider writes 316 Medicare Part D claims per year.
What drugs does Michael Walker, PA-C prescribe most often? ▼
Based on 2023 Medicare Part D data, Michael Walker, PA-C's most frequently prescribed drugs include Trulicity, Ursodiol, Ondansetron Odt. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Michael Walker, PA-C accept Medicare? ▼
Michael Walker, PA-C appears in CMS Medicare data with 220 Part D claims and 50 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Michael Walker, PA-C's credentials? ▼
Michael Walker, PA-C's NPI is 1730841107 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.