Karen Holzer, FNP-C
NPI 1780394593 · Family Nurse Practitioner · La Vernia, TX
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karen Holzer, FNP-C is a Family Nurse Practitioner provider in La Vernia, TX (NPI 1780394593).
Provider details
- NPI number
- 1780394593
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP-C
- Sex
- Female
- Sole proprietor
- Yes
- License
- 1099965 (TX)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
3 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 10 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 56 | 51 |
| Methylprednisolone | 49 | 47 |
| Prednisone | 45 | 44 |
| Nitrofurantoin Monohyd/M-Crystbrand: Nitrofurantoin Mono-Macro | 34 | 33 |
| Azithromycin | 31 | 29 |
| Sulfamethoxazole/Trimethoprimbrand: Sulfamethoxazole-Trimethoprim | 25 | 24 |
| Mupirocin | 22 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$55 across 3 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
- 2022-12-02
- Last updated
- 2023-12-19
- Certified
- 2023-12-19
Frequently asked questions
- What is Karen Holzer's NPI number?
- Karen Holzer's National Provider Identifier (NPI) is 1780394593, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Holzer's specialty?
- Karen Holzer is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Karen Holzer located?
- Karen Holzer's practice location on file with NPPES is 13857 US Highway 87 W, La Vernia, TX 78121-5919.
- What is Karen Holzer's phone number?
- The practice phone number listed in the NPPES registry for Karen Holzer is (303) 711-4008.
- Does Karen Holzer accept Medicare?
- Karen Holzer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karen Holzer's NPI active?
- Yes — Karen Holzer's NPI (1780394593) is active in the NPPES registry as of the last update on 2023-12-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.