2026 NPPES data Registered Nurse NPI 1518308923 ARNP
Verify on CMS →

CASEY CLARK, ARNP

Registered Nurse in RALEIGH, North Carolina. 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 · 176 beneficiaries · Registered Nurse avg: 1K
Generic prescribing
88%
generic claims · 12% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$276.2
14 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

CASEY CLARK, ARNP filed 1,550 Medicare Part D claims in 2023 as a Registered Nurse in RALEIGH, North Carolina, prescribing 88% generic.

2K
Part D claims, 2023
88%
generic prescribing
$276.2
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.

CASEY CLARK, ARNP's Medicare Part D volume vs every U.S. prescriber

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

1,550 Top 19% higher than 81% 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%). This entry sits in this band. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. 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 CASEY CLARK, ARNP?

Quality data not reported

NPI registry status

Active

Issued 07/13/2013

NPI 1518308923

Primary specialty

Registered Nurse

High-volume

175,652 US NPIs in this specialty

Medicare Part D claims

1,550 55% vs specialty avg

2023 prescription claims

Specialty avg: 1,000

Specialty distribution in North Carolina

How Registered Nurse compares to other specialties among North Carolina providers

North Carolina providers

Registered Nurse share within North Carolina

1. Registered Nurse42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Registered Nurse share within North Carolina

Specialty board-certification context

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

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

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

0%100%78%
Est. board-certified rate (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).

CASEY CLARK, ARNP appears in the CMS NPPES registry as a Registered Nurse provider holding ARNP credentials at 815 OBERLIN RD, RALEIGH, NC, 27605, with a listed phone of (630) 740-0574. NPI 1518308923 was issued on 07/13/2013. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what CLARK 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 1,550 prescription claims written by this provider, covering 176 Medicare beneficiaries and totaling roughly $150K in drug spend, split 12% brand-name and 88% generic by claim count, with an opioid prescribing rate of 1.9%. 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.

Registered Nurse is a high-volume specialty nationwide, with 175,652 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

815 OBERLIN RD
RALEIGH, NC 27605

Provider Details

NPI 1518308923
Specialty Registered Nurse
Credentials ARNP
Gender Male
NPI Issued 07/13/2013

Hospital and facility affiliations

Facilities where CASEY CLARK, ARNP 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.

AVANCE CARE PA
KNIGHTDALE, NC

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 CASEY CLARK, ARNP. Source: openpaymentsdata.cms.gov.

Total received

$276

Largest payer

Lilly USA, LLC

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

CASEY CLARK, ARNP — brand share 12.0%
Specialty average (est.)

12% brand-name claims vs 88% generic, on 1,550 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.

1,550
Total Claims
$150K
Total Drug Cost
176
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
3,338
Total Day Supply
96,157
Brand vs Generic
12% brand / 88% generic
Brand Drug Cost
$124K
Generic Drug Cost
$24K
Opioid Claims
29 (1.9% rate)
Antibiotic Claims
60

Patient Demographics

Average Patient Age
69.2 years
Avg HCC Risk Score
1.11
Gender Split
54% female / 46% male

Top Prescribed Drugs (Medicare Part D)

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

What CASEY CLARK, ARNP 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
Amlodipine Besylate
92
Levothyroxine Sodium
64
Atorvastatin Calcium
55
Omeprazole
47
Losartan Potassium
43
Rosuvastatin Calcium
40
Metformin Hcl
37
Furosemide
33
Lisinopril
33
Tamsulosin Hcl
32

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

Registered Nurse Overview

How CASEY CLARK, ARNP fits within the Registered Nurse landscape nationally.

175,652
Registered Nurse Providers in US
56
States with Registered Nurse
1,000
Avg Claims per Provider

CASEY CLARK, ARNP's 1,550 claims are above the specialty average of 1,000.

Nearby Registered Nurse Providers in North Carolina

Other clinicians with the same primary specialty enrolled in North Carolina, drawn from the same CMS NPPES roster as CLARK.

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

Frequently Asked Questions

What is CASEY CLARK, ARNP's specialty?
CASEY CLARK, ARNP specializes in Registered Nurse and practices in RALEIGH, North Carolina. Credentials: ARNP.
How much does CASEY CLARK, ARNP prescribe under Medicare Part D?
In 2023, CASEY CLARK, ARNP wrote 1,550 Medicare Part D claims totaling $150K in drug costs for 176 beneficiaries.
Where is CASEY CLARK, ARNP located?
CASEY CLARK, ARNP is located at 815 OBERLIN RD, RALEIGH, NC, 27605. Phone: (630) 740-0574.
What is CASEY CLARK, ARNP's NPI number?
CASEY CLARK, ARNP's National Provider Identifier (NPI) is 1518308923, issued on 07/13/2013.
Does CASEY CLARK, ARNP prescribe more brand-name or generic drugs?
CASEY CLARK, ARNP's prescribing is 12% brand-name and 88% generic drugs by claim count, with $124K in brand drug costs.
Does CASEY CLARK, ARNP prescribe opioids?
Yes, CASEY CLARK, ARNP had 29 opioid claims in 2023 with an opioid prescribing rate of 1.9%.
How many Registered Nurse providers are there in the US?
There are 175,652 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 CASEY CLARK, ARNP prescribe most often?
Based on 2023 Medicare Part D data, CASEY CLARK, ARNP's most frequently prescribed drugs include Amlodipine Besylate, Levothyroxine Sodium, Atorvastatin Calcium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does CASEY CLARK, ARNP accept Medicare?
CASEY CLARK, ARNP appears in CMS Medicare data with 1,550 Part D claims and 176 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify CASEY CLARK, ARNP's credentials?
CASEY CLARK, ARNP's NPI is 1518308923 with credentials ARNP. 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