NPI registry status
Active
2026 NPPES data Physician Assistant NPI 1881793206 PAC
Verify on CMS → John Anczak, PAC
Physician Assistant in Eau Claire, Wisconsin.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 156,084 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
681
Medicare Part D claims · 500 beneficiaries · Physician Assistant avg: 832
What the federal data shows
John Anczak, PAC filed 681 Medicare Part D claims in 2024 as a Physician Assistant in Eau Claire, Wisconsin.
- 681
- Part D claims, 2024
- ≥68th
- 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 John Anczak, PAC
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 1881793206), first enumerated 09/22/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 681 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
3 CMS Care Compare hospital affiliations on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- 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.
CMS NPPES provider registry desk
NPI 1881793206 · Physician Assistant
NPI-10 · ENUM-LEGACY · TAX-MEGA · RX-LIGHT · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1881793206
- ENUM-LEGACY 2006
- TAX-MEGA 156K Physician Assistant
- RX-LIGHT 681
- BOOK-LIGHT 3,317 in Wisconsin
- PHOTO-ENUM Angela Beckhold · 2006
John Anczak, PAC's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
681 ≥ 68th percentile 68% 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 John Anczak, PAC?
Quality data not reportedPrimary specialty
Physician Assistant
Medicare Part D claims
681 18% vs specialty avg
Specialty distribution in Wisconsin
How Physician Assistant compares to other specialties among Wisconsin 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).
Practice Address
Provider Details
| NPI | 1881793206 |
|---|---|
| Specialty | Physician Assistant |
| Credentials | PAC |
| Gender | Male |
| NPI Issued | 09/22/2006 |
Hospital and facility affiliations
Facilities where John Anczak, PAC 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.
According to CMS billing records, John Anczak, PAC is affiliated with 3 Medicare-billing facilities across 2 states.
Fairview Clinics
River Falls, WI
Healtheast Medical Research Institute
Saint Paul, MN
Mayo Clinic Health System-Northwest Wisconsin Region Inc
Eau Claire, WI
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2024.
681
Total Claims
$9K
Total Drug Cost
500
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 714.633
- Total Day Supply
- 9,363
- Generic Drug Cost
- $5K
- Antibiotic Claims
- 324
Patient Demographics
- Average Patient Age
- 72.4 years
- Avg HCC Risk Score
- 1.12
- Gender Split
- 61% female / 39% male
- Age Distribution
- <65: 56, 65-74: 224, 75-84: 171, 85+: 49
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What John Anczak, PAC prescribes most
Top Medicare Part D drugs by claim count, 2024
- Albuterol Sulfate …
Albuterol Sulfate Hfa
61 claims
- Cefdinir
Cefdinir
58 claims
- Cefadroxil
Cefadroxil
57 claims
- Amoxicillin-Clavul…
Amoxicillin-Clavulanate Potass
54 claims
- Doxycycline Hyclate
Doxycycline Hyclate
52 claims
- Prednisone
Prednisone
46 claims
- Fluticasone Propio…
Fluticasone Propionate
35 claims
- Cephalexin
Cephalexin
26 claims
| Drug | Claims |
|---|---|
| Albuterol Sulfate Hfa Albuterol Sulfate | 61 |
| Cefdinir | 58 |
| Cefadroxil | 57 |
| Amoxicillin-Clavulanate Potass Amoxicillin/Potassium Clav | 54 |
| Doxycycline Hyclate | 52 |
| Prednisone | 46 |
| Fluticasone Propionate | 35 |
| Cephalexin | 26 |
| Azithromycin | 22 |
| Diclofenac Sodium | 21 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Physician Assistant Overview
How John Anczak, PAC fits within the Physician Assistant landscape nationally.
156,084
Physician Assistant Providers in US
56
States with Physician Assistant
832
Avg Claims per Provider
John Anczak, PAC's 681 claims are below the specialty average of 832.
Nationwide Physician Assistant peers with similar MIPS or enrollment year
Two federal-record peer sets for Anczak, both outside Wisconsin so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Physician Assistant Providers in Wisconsin
Other clinicians with the same primary specialty enrolled in Wisconsin, drawn from the same CMS NPPES roster as Anczak.
One of 3,317 Physician Assistant providers enrolled in Wisconsin, 5 are shown here.
Amber Abraham
PA-C
Green Bay, WI
Roopa Achuri
Neenah, WI
Carleen Acker
PA-C
Madison, WI
Lauren Ackerman
PA-C
Cudahy, WI
Jocelyn Acompanado
PA-C
Sheboygan, WI
Compare Physician Assistant nationally: see state-by-state distribution →
Frequently Asked Questions
What is John Anczak, PAC's specialty? ▼
John Anczak, PAC specializes in Physician Assistant and practices in Eau Claire, Wisconsin. Credentials: PAC.
How much does John Anczak, PAC prescribe under Medicare Part D? ▼
In 2024, John Anczak, PAC wrote 681 Medicare Part D claims totaling $9K in drug costs for 500 beneficiaries.
Where is John Anczak, PAC located? ▼
John Anczak, PAC is located at 733 W CLAIREMONT AVE, Eau Claire, WI, 54701. Phone: (715) 838-5222.
What is John Anczak, PAC's NPI number? ▼
John Anczak, PAC's National Provider Identifier (NPI) is 1881793206, issued on 09/22/2006.
How many Physician Assistant providers are there in the US? ▼
There are 156,084 Physician Assistant providers across 56 states in the US. The average Physician Assistant provider writes 832 Medicare Part D claims per year.
What drugs does John Anczak, PAC prescribe most often? ▼
Based on 2024 Medicare Part D data, John Anczak, PAC's most frequently prescribed drugs include Albuterol Sulfate Hfa, Cefdinir, Cefadroxil. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does John Anczak, PAC accept Medicare? ▼
John Anczak, PAC appears in CMS Medicare data with 681 Part D claims and 500 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify John Anczak, PAC's credentials? ▼
John Anczak, PAC's NPI is 1881793206 with credentials PAC. 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.