Karen Noreen Cassidy Diez, FNP-C
Nurse Practitioner · Asheville, NC
Karen Noreen Cassidy Diez, FNP-C is a nurse practitioner with a practice address in Asheville, North Carolina, and NPI 1265999023, issued on Feb 27, 2019. Check the license (North Carolina 5011534, as entered in NPPES) with the North Carolina board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Karen Noreen Cassidy Diez
- Credential
- FNP-C
- Primary taxonomy
- Nurse Practitioner 363L00000X
- License number
- 5011534 NC
Self-reported in NPPES; status is on the state search - Practice location
- 4 Vanderbilt Park Dr Ste 100, Asheville, NC 28803
- Phone
- (828) 258-0397
- Enumerated
- Feb 27, 2019
- Record last updated
- Dec 18, 2024
- Fax
- (828) 252-1969
- Medicare enrollment
- Enrolled (PECOS I20230508002542); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest nurse practitioner records → All 4,524 in North Carolina → Look up another NPI →
Also registered at 4 Vanderbilt Park Dr Ste 100
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Karen Noreen Cassidy Diez in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich North Carolina board licenses this profession
Search for license 5011534Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
7.1 times the Medicare Part D claims of the average nurse practitioner in 2024
7,848 Medicare Part D claims for 677 beneficiaries, against an average of 1,109 among the 54,319 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims. 216 claims were for opioids.
Most prescribed
- Levothyroxine Sodium364 claims
- Amlodipine Besylate361 claims
- Atorvastatin Calcium345 claims
- Lisinopril270 claims
- Rosuvastatin Calcium203 claims
- Gabapentin191 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $114.89
2 payments; by number, the most common kind was food and beverage; the largest payer was Salix Pharmaceuticals, a division of Bausch Health US, LLC. The 38,884 providers of this specialty with any payment received $791.64 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Inpatient Consultants OF North Carolina PCAsheville, NC
- NM Pacs 2 LLCAsheville, NC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Karen Noreen Cassidy Diez among 4,524 nurse practitioner records in North Carolina
Karen Noreen Cassidy Diez, FNP-C is one of 4,524 nurse practitioner records with a practice address in North Carolina. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 61% of them.
- NPI issued2019 · 61% of these records are older, 33% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2018 · median 2018 among the 2,863 with a school on file
- Record last updated2024 · 34% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363L00000X and a North Carolina practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
198 nurse practitioner records list a practice address in Asheville
They are 198 of the 8,173 NPPES records with a practice address in Asheville, and 4,524 nurse practitioner records in North Carolina.
All 4,524 in North Carolina → Every provider in Asheville → Nurse Practitioner nationwide →
The 8 nurse practitioner records with the nearest ZIP codes
- Stephanie Anderson, RNMSNAsheville, NC 288031366656761
- Lee Boyd, ARNPAsheville, NC 288031295700573
- Shawn Fiora, NPAsheville, NC 288031376675389
- Mary Girardi, N.P.Asheville, NC 288031427279256
- Linda Harwood, FNPAsheville, NC 288031598719122
- Rani Khan, RN, MSN, CNMAsheville, NC 288031073570966
- Susan Koesters, F.N.P.Asheville, NC 288031063599603
- Susan Meade, NURSE PRACTICTIONERAsheville, NC 288031346344819
Common questions
What is Karen Noreen Cassidy Diez, FNP-C's NPI number?
Karen Noreen Cassidy Diez, FNP-C's National Provider Identifier (NPI) is 1265999023, issued on Feb 27, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Karen Noreen Cassidy Diez, FNP-C located?
The NPPES record lists a practice address at 4 Vanderbilt Park Dr Ste 100, Asheville, NC, 28803. Phone: (828) 258-0397. Providers update this record themselves, so call before visiting.
How can I verify Karen Noreen Cassidy Diez, FNP-C's license?
NPPES lists North Carolina license number 5011534, as entered by the provider. Search the North Carolina board that licenses this profession; the NPPES record confirms identity only.
How much does Karen Noreen Cassidy Diez, FNP-C prescribe under Medicare Part D?
In 2024, Karen Noreen Cassidy Diez, FNP-C had 7,848 Medicare Part D claims for 677 beneficiaries; the average among nurse practitioner prescribers was 1,109. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.