2026 NPPES data Ambulatory Care Registered Nurse NPI 1043497126 MSN, FNP
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KAREN KOZLESKI, MSN, FNP

Ambulatory Care Registered Nurse in MEDFORD, Oregon. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
298
Medicare Part D claims · 59 beneficiaries · Ambulatory Care Registered Nurse avg: 695
What the federal data reveals: KAREN KOZLESKI, MSN, FNP is a Ambulatory Care Registered Nurse ([object Object]) practicing in MEDFORD, Oregon with a Medicare Part D prescribing footprint of 298 claims across 59 beneficiaries .

What stands out: KAREN KOZLESKI, MSN, FNP filed 298 Medicare Part D claims in 2023 across MEDFORD, Oregon. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

KAREN KOZLESKI, MSN, FNP at a glance

Quality data not reported

NPI registry status

Active

Issued 01/30/2008

NPI 1043497126

Primary specialty

Ambulatory Care Registered Nurse

Niche

3,123 US NPIs in this specialty

Medicare Part D claims

298 57% vs specialty avg

2023 prescription claims

Specialty avg: 695

Specialty distribution in Oregon

How Ambulatory Care Registered Nurse compares to other specialties among Oregon providers

Oregon providers

Ambulatory Care Registered Nurse share within Oregon

1. Ambulatory Care Registered Nurse42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Ambulatory Care Registered Nurse share within Oregon

Specialty board-certification context

Estimated specialty board-certified rate — Ambulatory Care Registered Nurse (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Ambulatory Care Registered Nurse ABMS/AOA estimate

Est. board-certified rate (Ambulatory Care Registered Nurse) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Ambulatory Care Registered Nurse) — ABMS / AOA estimate

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 KOZLESKI, MSN, FNP is a Ambulatory Care Registered Nurse provider practicing in MEDFORD, Oregon, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MSN, FNP. NPI: 1043497126. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

KAREN KOZLESKI, MSN, FNP appears in the CMS NPPES registry as a Ambulatory Care Registered Nurse provider holding MSN, FNP credentials at 3524 HEATHROW WAY, MEDFORD, OR, 97504, with a listed phone of (541) 646-3505. NPI 1043497126 was issued on 01/30/2008. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what KOZLESKI most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 298 prescription claims written by this provider, covering 59 Medicare beneficiaries and totaling roughly $11K in drug spend. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Ambulatory Care Registered Nurse is a narrow specialty nationwide, with 3,123 enrolled providers across 53 states and an average of 695 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

3524 HEATHROW WAY
MEDFORD, OR 97504

Provider Details

NPI 1043497126
Specialty Ambulatory Care Registered Nurse
Credentials MSN, FNP
Gender Female
NPI Issued 01/30/2008

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

298
Total Claims
$11K
Total Drug Cost
59
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
831
Total Day Supply
24,862
Generic Drug Cost
$6K

Patient Demographics

Average Patient Age
76.0 years
Avg HCC Risk Score
0.94

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

Drug Claims
Levothyroxine Sodium
29
Amlodipine Besylate
20
Atorvastatin Calcium
19
Potassium Chloride
16
Lisinopril
15
Duloxetine Hcl
14
Losartan Potassium
12
Omeprazole
12

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Ambulatory Care Registered Nurse Overview

How KAREN KOZLESKI, MSN, FNP fits within the Ambulatory Care Registered Nurse landscape nationally.

3,123
Ambulatory Care Registered Nurse Providers in US
53
States with Ambulatory Care Registered Nurse
695
Avg Claims per Provider

KAREN KOZLESKI, MSN, FNP's 298 claims are below the specialty average of 695.

Nearby Ambulatory Care Registered Nurse Providers in Oregon

Other clinicians with the same primary specialty enrolled in Oregon, drawn from the same CMS NPPES roster as KOZLESKI.

Compare Ambulatory Care Registered Nurse nationally: see state-by-state distribution →

Frequently Asked Questions

What is KAREN KOZLESKI, MSN, FNP's specialty?
KAREN KOZLESKI, MSN, FNP specializes in Ambulatory Care Registered Nurse and practices in MEDFORD, Oregon. Credentials: MSN, FNP.
How much does KAREN KOZLESKI, MSN, FNP prescribe under Medicare Part D?
In 2023, KAREN KOZLESKI, MSN, FNP wrote 298 Medicare Part D claims totaling $11K in drug costs for 59 beneficiaries.
Where is KAREN KOZLESKI, MSN, FNP located?
KAREN KOZLESKI, MSN, FNP is located at 3524 HEATHROW WAY, MEDFORD, OR, 97504. Phone: (541) 646-3505.
What is KAREN KOZLESKI, MSN, FNP's NPI number?
KAREN KOZLESKI, MSN, FNP's National Provider Identifier (NPI) is 1043497126, issued on 01/30/2008.
How many Ambulatory Care Registered Nurse providers are there in the US?
There are 3,123 Ambulatory Care Registered Nurse providers across 53 states in the US. The average Ambulatory Care Registered Nurse provider writes 695 Medicare Part D claims per year.
What drugs does KAREN KOZLESKI, MSN, FNP prescribe most often?
Based on 2023 Medicare Part D data, KAREN KOZLESKI, MSN, FNP's most frequently prescribed drugs include Levothyroxine Sodium, Amlodipine Besylate, Atorvastatin Calcium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does KAREN KOZLESKI, MSN, FNP accept Medicare?
KAREN KOZLESKI, MSN, FNP appears in CMS Medicare data with 298 Part D claims and 59 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify KAREN KOZLESKI, MSN, FNP's credentials?
KAREN KOZLESKI, MSN, FNP's NPI is 1043497126 with credentials MSN, FNP. 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

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