NPI registry status
Active
2026 NPPES data Primary Care Nurse Practitioner NPI 1720661549 FNP-C
Verify on CMS → Karen Eller, FNP-C
Primary Care Nurse Practitioner in Sweetwater, Tennessee.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 10,138 in Primary Care 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
421
Medicare Part D claims · 133 beneficiaries · Primary Care Nurse Practitioner avg: 1K
Generic prescribing
96%
generic claims · 4% 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
Karen Eller, FNP-C filed 421 Medicare Part D claims in 2023 as a Primary Care Nurse Practitioner in Sweetwater, Tennessee, prescribing 96% generic.
- 421
- Part D claims, 2023
- 96%
- 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.
Karen Eller, FNP-C's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
421 Top 38% higher than 62% 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 Karen Eller, FNP-C?
Quality data not reportedPrimary specialty
Primary Care Nurse Practitioner
Medicare Part D claims
421 69% vs specialty avg
Specialty distribution in Tennessee
How Primary Care Nurse Practitioner compares to other specialties among Tennessee 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 Primary Care Nurse Practitioner. 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).
Karen Eller, FNP-C appears in the CMS NPPES registry as a Primary Care Nurse Practitioner provider holding FNP-C credentials at 304 WRIGHT ST, Sweetwater, TN, 37874, with a listed phone of (865) 213-8200. NPI 1720661549 was issued on 04/29/2021.
Medicare Part D records for calendar year 2023 show 421 prescription claims written by this provider, covering 133 Medicare beneficiaries and totaling roughly $5K in drug spend, split 4% brand-name and 96% generic by claim count.
Primary Care Nurse Practitioner is a mid-sized specialty nationwide, with 10,138 enrolled providers across 54 states and an average of 1,363 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 | 1720661549 |
|---|---|
| Specialty | Primary Care Nurse Practitioner |
| Credentials | FNP-C |
| Gender | Female |
| NPI Issued | 04/29/2021 |
Hospital and facility affiliations
Facilities where Karen Eller, 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.
Associated Wound Specialists PC
Knoxville, TN
Premier Wound Care OF Tennessee, PC
Morristown, TN
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 · Generic-heavy
Karen Eller, FNP-C - brand share 4.0%
Primary Care Nurse Practitioner average
4% brand-name claims vs 96% generic, on 421 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.
421
Total Claims
$5K
Total Drug Cost
133
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 497
- Total Day Supply
- 9,852
- Brand vs Generic
- 4% brand / 96% generic
- Brand Drug Cost
- $2K
- Generic Drug Cost
- $4K
- Antibiotic Claims
- 109
Patient Demographics
- Average Patient Age
- 65.6 years
- Avg HCC Risk Score
- 1.55
- Gender Split
- 62% female / 38% male
- Age Distribution
- <65: 48, 65-74: 59, 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 Karen Eller, FNP-C prescribes most
Top Medicare Part D drugs by claim count, 2023
- Prednisone
Prednisone
47 claims
- Azithromycin
Azithromycin
44 claims
- Albuterol Sulfate …
Albuterol Sulfate Hfa
32 claims
- Amoxicillin-Clavul…
Amoxicillin-Clavulanate Potass
29 claims
- Montelukast Sodium
Montelukast Sodium
22 claims
| Drug | Claims |
|---|---|
| Prednisone | 47 |
| Azithromycin | 44 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 32 |
| Amoxicillin-Clavulanate Potass Amoxicillin/Potassium Clav | 29 |
| Montelukast Sodium | 22 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Primary Care Nurse Practitioner Overview
How Karen Eller, FNP-C fits within the Primary Care Nurse Practitioner landscape nationally.
10,138
Primary Care Nurse Practitioner Providers in US
54
States with Primary Care Nurse Practitioner
1,363
Avg Claims per Provider
Karen Eller, FNP-C's 421 claims are below the specialty average of 1,363.
Nearby Primary Care Nurse Practitioner Providers in Tennessee
Other clinicians with the same primary specialty enrolled in Tennessee, drawn from the same CMS NPPES roster as Eller.
Dr. Anna Adams
FNP-BC
Ramer, TN
Dr. Tracie Adams
FNP-C
Lafayette, TN
Dr. Titilola Adebanjo
N.P.
Memphis, TN
Dr. Mofoluwasho Adenekan
FNP
Knoxville, TN
Dr. Trenika Alexander-Gorea
DNP FNP-BC
Memphis, TN
Compare Primary Care Nurse Practitioner 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 Tennessee medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Primary Care Nurse Practitioner 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 Tennessee
Frequently Asked Questions
What is Karen Eller, FNP-C's specialty? ▼
Karen Eller, FNP-C specializes in Primary Care Nurse Practitioner and practices in Sweetwater, Tennessee. Credentials: FNP-C.
How much does Karen Eller, FNP-C prescribe under Medicare Part D? ▼
In 2023, Karen Eller, FNP-C wrote 421 Medicare Part D claims totaling $5K in drug costs for 133 beneficiaries.
Where is Karen Eller, FNP-C located? ▼
Karen Eller, FNP-C is located at 304 WRIGHT ST, Sweetwater, TN, 37874. Phone: (865) 213-8200.
What is Karen Eller, FNP-C's NPI number? ▼
Karen Eller, FNP-C's National Provider Identifier (NPI) is 1720661549, issued on 04/29/2021.
Does Karen Eller, FNP-C prescribe more brand-name or generic drugs? ▼
Karen Eller, FNP-C's prescribing is 4% brand-name and 96% generic drugs by claim count, with $2K in brand drug costs.
How many Primary Care Nurse Practitioner providers are there in the US? ▼
There are 10,138 Primary Care Nurse Practitioner providers across 54 states in the US. The average Primary Care Nurse Practitioner provider writes 1,363 Medicare Part D claims per year.
What drugs does Karen Eller, FNP-C prescribe most often? ▼
Based on 2023 Medicare Part D data, Karen Eller, FNP-C's most frequently prescribed drugs include Prednisone, Azithromycin, Albuterol Sulfate Hfa. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Karen Eller, FNP-C accept Medicare? ▼
Karen Eller, FNP-C appears in CMS Medicare data with 421 Part D claims and 133 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Karen Eller, FNP-C's credentials? ▼
Karen Eller, FNP-C's NPI is 1720661549 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.