Karen Merkel, FNP-C
NPI 1093109340 · Family Nurse Practitioner · Austin, TX
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karen Merkel, FNP-C is a Family Nurse Practitioner provider in Austin, TX (NPI 1093109340).
Provider details
- NPI number
- 1093109340
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP-C
- Sex
- Female
- Sole proprietor
- Yes
- License
- AP127465 (TX)
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
11 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
393 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 | 212 | $107 |
| Automated Urinalysis Test81003 | 54 | $2 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 49 | $12 |
| Detection Test By Immunoassay With Direct Visual Observation for Influenza Virus87804 | 26 | $16 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 17 | $75 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Tracing93005 | 13 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 13 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Methylprednisolone | 122 | 111 |
| Azithromycin | 68 | 63 |
| Nitrofurantoin Monohyd/M-Crystbrand: Nitrofurantoin Mono-Macro | 32 | 30 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 28 | 27 |
| Doxycycline Monohydrate | 24 | 24 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 20 | 17 |
| Cephalexin | 19 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$34 across 1 record (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
- 2015-03-25
- Last updated
- 2022-01-20
- Certified
- 2022-01-20
Frequently asked questions
- What is Karen Merkel's NPI number?
- Karen Merkel's National Provider Identifier (NPI) is 1093109340, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Merkel's specialty?
- Karen Merkel is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Karen Merkel located?
- Karen Merkel's practice location on file with NPPES is 5000 W Slaughter Ln, Austin, TX 78749-3997.
- What is Karen Merkel's phone number?
- The practice phone number listed in the NPPES registry for Karen Merkel is (512) 654-4000.
- Does Karen Merkel accept Medicare?
- Karen Merkel is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karen Merkel's NPI active?
- Yes — Karen Merkel's NPI (1093109340) is active in the NPPES registry as of the last update on 2022-01-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.