NPI registry status
Active
2026 NPPES data Registered Nurse NPI 1740913904 FNP-C
Verify on CMS → William Anderson, FNP-C
Registered Nurse in Oshkosh, 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 177,204 in Registered Nurse, 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
2K
Medicare Part D claims · 171 beneficiaries · Registered Nurse avg: 1K
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
William Anderson, FNP-C filed 1,976 Medicare Part D claims in 2023 as a Registered Nurse in Oshkosh, Wisconsin.
- 2K
- Part D claims, 2023
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.
William Anderson, FNP-C's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
1,976 Top 16% higher than 84% 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 William Anderson, FNP-C?
Quality data not reportedPrimary specialty
Registered Nurse
Medicare Part D claims
1,976 98% vs specialty avg
Specialty distribution in Wisconsin
How Registered Nurse 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 Registered Nurse. 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).
William Anderson, FNP-C appears in the CMS NPPES registry as a Registered Nurse provider holding FNP-C credentials at 855 N WESTHAVEN DR, Oshkosh, WI, 54904, with a listed phone of (920) 456-7000. NPI 1740913904 was issued on 07/06/2022.
Medicare Part D records for calendar year 2023 show 1,976 prescription claims written by this provider, covering 171 Medicare beneficiaries and totaling roughly $148K in drug spend, with an opioid prescribing rate of 2.4%.
Registered Nurse is a high-volume specialty nationwide, with 177,204 enrolled providers across 56 states and an average of 1,000 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 | 1740913904 |
|---|---|
| Specialty | Registered Nurse |
| Credentials | FNP-C |
| Gender | Male |
| NPI Issued | 07/06/2022 |
Hospital and facility affiliations
Facilities where William Anderson, FNP-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.
Aurora Medical Group, Inc.
Oshkosh, 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 2023.
1,976
Total Claims
$148K
Total Drug Cost
171
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 2,745
- Total Day Supply
- 74,306
- Generic Drug Cost
- $37K
- Opioid Claims
- 48 (2.4% rate)
- Antibiotic Claims
- 53
Patient Demographics
- Average Patient Age
- 68.8 years
- Avg HCC Risk Score
- 1.72
- Gender Split
- 64% female / 36% male
- Age Distribution
- <65: 42, 65-74: 70, 75-84: 40, 85+: 19
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What William Anderson, FNP-C prescribes most
Top Medicare Part D drugs by claim count, 2023
- Tizanidine Hcl
Tizanidine Hcl
65 claims
- Atorvastatin Calcium
Atorvastatin Calcium
62 claims
- Buspirone Hcl
Buspirone Hcl
51 claims
- Levothyroxine Sodium
Levothyroxine Sodium
49 claims
- Omeprazole
Omeprazole
45 claims
- Potassium Chloride
Potassium Chloride
45 claims
- Famotidine
Famotidine
44 claims
- Metoprolol Succinate
Metoprolol Succinate
44 claims
| Drug | Claims |
|---|---|
| Tizanidine Hcl | 65 |
| Atorvastatin Calcium | 62 |
| Buspirone Hcl | 51 |
| Levothyroxine Sodium | 49 |
| Omeprazole | 45 |
| Potassium Chloride | 45 |
| Famotidine | 44 |
| Metoprolol Succinate | 44 |
| Amlodipine Besylate | 42 |
| Gabapentin | 42 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Registered Nurse Overview
How William Anderson, FNP-C fits within the Registered Nurse landscape nationally.
177,204
Registered Nurse Providers in US
56
States with Registered Nurse
1,000
Avg Claims per Provider
William Anderson, FNP-C's 1,976 claims are above the specialty average of 1,000.
Nearby Registered Nurse Providers in Wisconsin
Other clinicians with the same primary specialty enrolled in Wisconsin, drawn from the same CMS NPPES roster as Anderson.
Dr. Julie Abbott
RN, ADN
Arkdale, WI
Kathleen Abel
Madison, WI
Rhoda Abelmann
Franklin, WI
Dr. Jessica Acevedo
RN
Wauwatosa, WI
Dr. Kate Achman
DNP, RN, ACGNS-BC
Tomah, WI
Compare Registered Nurse 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 Wisconsin medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Registered Nurse 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 Wisconsin
Frequently Asked Questions
What is William Anderson, FNP-C's specialty? ▼
William Anderson, FNP-C specializes in Registered Nurse and practices in Oshkosh, Wisconsin. Credentials: FNP-C.
How much does William Anderson, FNP-C prescribe under Medicare Part D? ▼
In 2023, William Anderson, FNP-C wrote 1,976 Medicare Part D claims totaling $148K in drug costs for 171 beneficiaries.
Where is William Anderson, FNP-C located? ▼
William Anderson, FNP-C is located at 855 N WESTHAVEN DR, Oshkosh, WI, 54904. Phone: (920) 456-7000.
What is William Anderson, FNP-C's NPI number? ▼
William Anderson, FNP-C's National Provider Identifier (NPI) is 1740913904, issued on 07/06/2022.
Does William Anderson, FNP-C prescribe opioids? ▼
Yes, William Anderson, FNP-C had 48 opioid claims in 2023 with an opioid prescribing rate of 2.4%.
How many Registered Nurse providers are there in the US? ▼
There are 177,204 Registered Nurse providers across 56 states in the US. The average Registered Nurse provider writes 1,000 Medicare Part D claims per year.
What drugs does William Anderson, FNP-C prescribe most often? ▼
Based on 2023 Medicare Part D data, William Anderson, FNP-C's most frequently prescribed drugs include Tizanidine Hcl, Atorvastatin Calcium, Buspirone Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does William Anderson, FNP-C accept Medicare? ▼
William Anderson, FNP-C appears in CMS Medicare data with 1,976 Part D claims and 171 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify William Anderson, FNP-C's credentials? ▼
William Anderson, FNP-C's NPI is 1740913904 with credentials FNP-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.
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 May 2026.