2026 NPPES data Adult Health Nurse Practitioner NPI 1639647449 FNP-C
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VANESSA JOHNSTON, FNP-C

Adult Health Nurse Practitioner in EUGENE, 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
2K
Medicare Part D claims · 145 beneficiaries · Adult Health Nurse Practitioner avg: 1K
Generic prescribing
93%
generic claims · 7% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$309.64
7 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

VANESSA JOHNSTON, FNP-C filed 2,169 Medicare Part D claims in 2023 as a Adult Health Nurse Practitioner in EUGENE, Oregon, prescribing 93% generic.

2K
Part D claims, 2023
93%
generic prescribing
$309.64
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.

VANESSA JOHNSTON, FNP-C's Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

2,169 Top 15% higher than 85% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). Below this entry. 600–800: 56,224 prescribers (4%). Below this entry. 800–1,000: 40,919 prescribers (3%). Below this entry. 1,000–1,200: 31,827 prescribers (2%). Below this entry. 1,200–1,400: 26,224 prescribers (2%). Below this entry. 1,400–1,600: 21,710 prescribers (2%). Below this entry. 1,600–1,800: 19,072 prescribers (1%). Below this entry. 1,800–2,000: 16,451 prescribers (1%). Below this entry. 2,000–2,200: 213,991 prescribers (16%). This entry sits in this band. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

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 VANESSA JOHNSTON, FNP-C?

Quality data not reported

NPI registry status

Active

Issued 11/09/2018

NPI 1639647449

Primary specialty

Adult Health Nurse Practitioner

Mid-sized

29,492 US NPIs in this specialty

Medicare Part D claims

2,169 81% vs specialty avg

2023 prescription claims

Specialty avg: 1,201

Specialty distribution in Oregon

How Adult Health Nurse Practitioner compares to other specialties among Oregon providers

Oregon providers

Adult Health Nurse Practitioner share within Oregon

1. Adult Health Nurse Practitioner42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Adult Health Nurse Practitioner share within Oregon

Specialty board-certification context

Estimated specialty board-certified rate — Adult Health Nurse Practitioner (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Adult Health Nurse Practitioner ABMS/AOA estimate

Est. board-certified rate (Adult Health Nurse Practitioner) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Adult Health Nurse Practitioner) — 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).

VANESSA JOHNSTON, FNP-C appears in the CMS NPPES registry as a Adult Health Nurse Practitioner provider holding FNP-C credentials at 1605 OAK ST, EUGENE, OR, 97401, with a listed phone of (541) 246-3400. NPI 1639647449 was issued on 11/09/2018. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what JOHNSTON 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 2,169 prescription claims written by this provider, covering 145 Medicare beneficiaries and totaling roughly $131K in drug spend, split 7% brand-name and 93% generic by claim count, with an opioid prescribing rate of 48.4%. 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.

Adult Health Nurse Practitioner is a mid-sized specialty nationwide, with 29,492 enrolled providers across 55 states and an average of 1,201 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

1605 OAK ST
EUGENE, OR 97401

Provider Details

NPI 1639647449
Specialty Adult Health Nurse Practitioner
Credentials FNP-C
Gender Female
NPI Issued 11/09/2018

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 VANESSA JOHNSTON, FNP-C. Source: openpaymentsdata.cms.gov.

Total received

$310

Largest payer

Averitas Pharma 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 · Generic-heavy

VANESSA JOHNSTON, FNP-C — brand share 7.0%
Specialty average (est.)

7% brand-name claims vs 93% generic, on 2,169 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.

2,169
Total Claims
$131K
Total Drug Cost
145
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
2,706
Total Day Supply
72,404
Brand vs Generic
7% brand / 93% generic
Brand Drug Cost
$38K
Generic Drug Cost
$93K
Opioid Claims
1,050 (48.4% rate)

Patient Demographics

Average Patient Age
69.5 years
Avg HCC Risk Score
1.46
Gender Split
64% female / 36% male

Top Prescribed Drugs (Medicare Part D)

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

What VANESSA JOHNSTON, FNP-C prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Hydrocodone-Acetaminophen
Hydrocodone/Acetaminophen
270
Oxycodone Hcl
250
Buprenorphine Hcl
239
Buprenorphine-Naloxone
Buprenorphine Hcl/Naloxone Hcl
158
Gabapentin
140
Morphine Sulfate
111
Morphine Sulfate Er
Morphine Sulfate
108
Oxycodone-Acetaminophen
Oxycodone Hcl/Acetaminophen
70
Hydromorphone Hcl
66
Naloxone Hcl
64

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

Adult Health Nurse Practitioner Overview

How VANESSA JOHNSTON, FNP-C fits within the Adult Health Nurse Practitioner landscape nationally.

29,492
Adult Health Nurse Practitioner Providers in US
55
States with Adult Health Nurse Practitioner
1,201
Avg Claims per Provider

VANESSA JOHNSTON, FNP-C's 2,169 claims are above the specialty average of 1,201.

Nearby Adult Health Nurse Practitioner Providers in Oregon

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

Compare Adult Health Nurse Practitioner nationally: see state-by-state distribution →

Frequently Asked Questions

What is VANESSA JOHNSTON, FNP-C's specialty?
VANESSA JOHNSTON, FNP-C specializes in Adult Health Nurse Practitioner and practices in EUGENE, Oregon. Credentials: FNP-C.
How much does VANESSA JOHNSTON, FNP-C prescribe under Medicare Part D?
In 2023, VANESSA JOHNSTON, FNP-C wrote 2,169 Medicare Part D claims totaling $131K in drug costs for 145 beneficiaries.
Where is VANESSA JOHNSTON, FNP-C located?
VANESSA JOHNSTON, FNP-C is located at 1605 OAK ST, EUGENE, OR, 97401. Phone: (541) 246-3400.
What is VANESSA JOHNSTON, FNP-C's NPI number?
VANESSA JOHNSTON, FNP-C's National Provider Identifier (NPI) is 1639647449, issued on 11/09/2018.
Does VANESSA JOHNSTON, FNP-C prescribe more brand-name or generic drugs?
VANESSA JOHNSTON, FNP-C's prescribing is 7% brand-name and 93% generic drugs by claim count, with $38K in brand drug costs.
Does VANESSA JOHNSTON, FNP-C prescribe opioids?
Yes, VANESSA JOHNSTON, FNP-C had 1,050 opioid claims in 2023 with an opioid prescribing rate of 48.4%.
How many Adult Health Nurse Practitioner providers are there in the US?
There are 29,492 Adult Health Nurse Practitioner providers across 55 states in the US. The average Adult Health Nurse Practitioner provider writes 1,201 Medicare Part D claims per year.
What drugs does VANESSA JOHNSTON, FNP-C prescribe most often?
Based on 2023 Medicare Part D data, VANESSA JOHNSTON, FNP-C's most frequently prescribed drugs include Hydrocodone-Acetaminophen, Oxycodone Hcl, Buprenorphine Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does VANESSA JOHNSTON, FNP-C accept Medicare?
VANESSA JOHNSTON, FNP-C appears in CMS Medicare data with 2,169 Part D claims and 145 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify VANESSA JOHNSTON, FNP-C's credentials?
VANESSA JOHNSTON, FNP-C's NPI is 1639647449 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

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