NPI registry status
Active
2026 NPPES data Nurse Practitioner NPI 1619534690 DNP
Verify on CMS → Amy Fellenz, DNP
Nurse Practitioner in Marshfield, 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 89,808 in Nurse Practitioner, 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
919
Medicare Part D claims · 201 beneficiaries · Nurse Practitioner avg: 1K
Generic prescribing
86%
generic claims · 14% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
78.9/100
▼ 5 pts below national avg 83.5 · Above neutral
Industry payments
$74.4
3 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Amy Fellenz, DNP reported a CMS MIPS final score of 78.9/100 - below the 83.5 national average - and filed 919 Medicare Part D claims in 2024.
- 78.9/100
- MIPS score · -5 vs avg
- 919
- Part D claims, 2024
- 86%
- generic prescribing
- $74.4
- 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.
Federal trust snapshot
What official records show about Amy Fellenz, DNP
Federal records show an active NPI with both Medicare prescribing volume and a measured CMS quality score — objective registry data, not patient reviews.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1619534690), first enumerated 05/24/2019.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 919 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
CMS quality reporting (MIPS)
Reported a CMS MIPS final score of 78.9/100 in the Quality Payment Program — a federal quality measure, not a patient review.
Source: CMS Quality Payment Program
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Reported
Industry payment transparency
$74.4 in reported industry payments (3 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.
CMS NPPES provider registry desk
NPI 1619534690 · Nurse Practitioner
NPI-10 · ENUM-RECENT · TAX-MEGA · MIPS-BELOW · RX-LIGHT · BOOK-LIGHT · PHOTO-FINISH
- NPI-10 1619534690
- ENUM-RECENT 2019
- TAX-MEGA 90K Nurse Practitioner
- MIPS-BELOW 78.9/100
- RX-LIGHT 919
- BOOK-LIGHT 3,463 in Wisconsin
- PHOTO-FINISH Jerri Bingham · ±0.0
MIPS final-score neighbourhood
Same-specialty nationwide peers by CMS final score, not geographic proximity
- Fellenz · this p…
Fellenz · this provider
78.9 MIPS pts
- Rebekah Salles, …
Rebekah Salles, FNP
78.9 MIPS pts
- Joshua Holewinsk…
Joshua Holewinski, AGPCNP
78.9 MIPS pts
- Jerri Bingham · …
Jerri Bingham
78.9 MIPS pts
- Heather Kohring,…
Heather Kohring, FNP-C
78.9 MIPS pts
What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).
Amy Fellenz, DNP's MIPS score vs every measured U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.
79 ≥ 23rd percentile 23% of 454,083 measured providers are in lower value bands
Each bar is a band; taller bars hold more measured providers. 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 whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Amy Fellenz, DNP sits
This provider among nurse practitioner peers
Across the 13,205 nurse practitioner providers who report both Medicare Part D prescribing and a MIPS quality score, Amy Fellenz, DNP writes more Part D claims than 69% of them and scores higher on MIPS quality than 27% - placing this provider in the high-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Each dot is one nurse practitioner peer from a representative sample of 60; the gold marker is Amy Fellenz, DNP. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
What does the federal data show about Amy Fellenz, DNP?
Near national averagePrimary specialty
Nurse Practitioner
Medicare Part D claims
919 20% vs specialty avg
MIPS final score
78.9/100 4.6 pts vs avg
Specialty distribution in Wisconsin
How Nurse Practitioner compares to other specialties among Wisconsin providers
Medicare quality performance, MIPS
Amy Fellenz, DNP's 2023 MIPS final score plotted against the Nurse Practitioner national average
- MIPS Final Score
- 78.9/100
- vs 83.5 national avg · 2023 performance year
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 | 1619534690 |
|---|---|
| Specialty | Nurse Practitioner |
| Credentials | DNP |
| Gender | Female |
| NPI Issued | 05/24/2019 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
78.8552
Final Score
Measured-score avg: 83.5
66.6851
Quality
54.8733
Cost
99
Promoting Interoperability
Reporting: Group practice
Hospital and facility affiliations
Facilities where Amy Fellenz, DNP 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.
Mchs Hospitals Inc
Marshfield, 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).
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 Amy Fellenz, DNP. Source: openpaymentsdata.cms.gov.
Total received
$74
Largest payer
Medtronic, 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 · Typical
Amy Fellenz, DNP - brand share 14.0%
Nurse Practitioner average
14% brand-name claims vs 86% generic, on 919 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.
919
Total Claims
$82K
Total Drug Cost
201
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,515.2
- Total Day Supply
- 42,921
- Brand vs Generic
- 14% brand / 86% generic
- Brand Drug Cost
- $61K
- Generic Drug Cost
- $21K
- Antibiotic Claims
- 105
Patient Demographics
- Average Patient Age
- 75.1 years
- Avg HCC Risk Score
- 1.66
- Gender Split
- 42% female / 58% male
- Age Distribution
- <65: 23, 65-74: 66, 75-84: 78, 85+: 34
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Amy Fellenz, DNP prescribes most
Top Medicare Part D drugs by claim count, 2024
- Tamsulosin Hcl
Tamsulosin Hcl
181 claims
- Methenamine Hippur…
Methenamine Hippurate
108 claims
- Oxybutynin Chlorid…
Oxybutynin Chloride Er
100 claims
- Myrbetriq
Myrbetriq
95 claims
- Solifenacin Succin… 57
Solifenacin Succinate
57 claims
- Finasteride 55
Finasteride
55 claims
- Cephalexin 40
Cephalexin
40 claims
- Nitrofurantoin Mon… 35
Nitrofurantoin Mono-Macro
35 claims
| Drug | Claims |
|---|---|
| Tamsulosin Hcl | 181 |
| Methenamine Hippurate | 108 |
| Oxybutynin Chloride Er Oxybutynin Chloride | 100 |
| Myrbetriq Mirabegron | 95 |
| Solifenacin Succinate | 57 |
| Finasteride | 55 |
| Cephalexin | 40 |
| Nitrofurantoin Mono-Macro Nitrofurantoin Monohyd/M-Cryst | 35 |
| Oxybutynin Chloride | 23 |
| Fesoterodine Fumarate Er Fesoterodine Fumarate | 22 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Nurse Practitioner Overview
How Amy Fellenz, DNP fits within the Nurse Practitioner landscape nationally.
89,808
Nurse Practitioner Providers in US
56
States with Nurse Practitioner
1,144
Avg Claims per Provider
Amy Fellenz, DNP's 919 claims are below the specialty average of 1,144.
Nationwide Nurse Practitioner peers with similar MIPS or enrollment year
Two federal-record peer sets for Fellenz, both outside Wisconsin so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (78.9 here).
Same NPPES enumeration year (2019)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Nurse Practitioner Providers in Wisconsin
Other clinicians with the same primary specialty enrolled in Wisconsin, drawn from the same CMS NPPES roster as Fellenz.
One of 3,463 Nurse Practitioner providers enrolled in Wisconsin, 5 are shown here.
Caroline Aaberg
APNP
Madison, WI
Joyce Abbott
APNP
Oshkosh, WI
Mohamed Abdelazim
APNP
Appleton, WI
Jade Abts
NP
Green Bay, WI
Carol Adamczyk
MSN
Wauwatosa, WI
Compare Nurse Practitioner nationally: see state-by-state distribution →
Frequently Asked Questions
What is Amy Fellenz, DNP's specialty? ▼
Amy Fellenz, DNP specializes in Nurse Practitioner and practices in Marshfield, Wisconsin. Credentials: DNP.
How much does Amy Fellenz, DNP prescribe under Medicare Part D? ▼
In 2024, Amy Fellenz, DNP wrote 919 Medicare Part D claims totaling $82K in drug costs for 201 beneficiaries.
What is Amy Fellenz, DNP's Medicare quality score? ▼
Amy Fellenz, DNP has a CMS MIPS Final Score of 78.9/100 (Quality: 66.7, Cost: 54.9). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Amy Fellenz, DNP located? ▼
Amy Fellenz, DNP is located at 1000 N OAK AVE, Marshfield, WI, 54449. Phone: (715) 207-8691.
What is Amy Fellenz, DNP's NPI number? ▼
Amy Fellenz, DNP's National Provider Identifier (NPI) is 1619534690, issued on 05/24/2019.
Does Amy Fellenz, DNP prescribe more brand-name or generic drugs? ▼
Amy Fellenz, DNP's prescribing is 14% brand-name and 86% generic drugs by claim count, with $61K in brand drug costs.
How many Nurse Practitioner providers are there in the US? ▼
There are 89,808 Nurse Practitioner providers across 56 states in the US. The average Nurse Practitioner provider writes 1,144 Medicare Part D claims per year.
What drugs does Amy Fellenz, DNP prescribe most often? ▼
Based on 2024 Medicare Part D data, Amy Fellenz, DNP's most frequently prescribed drugs include Tamsulosin Hcl, Methenamine Hippurate, Oxybutynin Chloride Er. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Amy Fellenz, DNP accept Medicare? ▼
Amy Fellenz, DNP appears in CMS Medicare data with 919 Part D claims and 201 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Amy Fellenz, DNP's credentials? ▼
Amy Fellenz, DNP's NPI is 1619534690 with credentials DNP. 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.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- 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.