Karen Diez, FNP-C
NPI 1265999023 · Nurse Practitioner · Asheville, NC
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karen Diez, FNP-C is a Nurse Practitioner provider in Asheville, NC (NPI 1265999023).
Provider details
- NPI number
- 1265999023
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP-C
- Sex
- Female
- Sole proprietor
- No
- License
- 5011534 (NC)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
7 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
3,893 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 469 | $101 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 466 | $9 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 375 | $10 |
| Blood Test, Lipids (cholesterol and Triglycerides)80061 | 300 | $13 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 298 | $8 |
| Blood Test, Thyroid Stimulating Hormone (tsh)84443 | 278 | $16 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 136 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 364 | 106 |
| Amlodipine Besylate | 361 | 119 |
| Atorvastatin Calcium | 345 | 100 |
| Lisinopril | 270 | 82 |
| Rosuvastatin Calcium | 203 | 69 |
| Gabapentin | 191 | 59 |
| Simvastatin | 168 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$115 across 2 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2019-02-27
- Last updated
- 2024-12-18
- Certified
- 2024-12-18
Frequently asked questions
- What is Karen Diez's NPI number?
- Karen Diez's National Provider Identifier (NPI) is 1265999023, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Diez's specialty?
- Karen Diez is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Karen Diez located?
- Karen Diez's practice location on file with NPPES is 4 Vanderbilt Park Dr Ste 100, Asheville, NC 28803-2476.
- What is Karen Diez's phone number?
- The practice phone number listed in the NPPES registry for Karen Diez is (828) 258-0397.
- Does Karen Diez accept Medicare?
- Karen Diez is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karen Diez's NPI active?
- Yes — Karen Diez's NPI (1265999023) is active in the NPPES registry as of the last update on 2024-12-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.