Karen Popp, N.P.
NPI 1588744791 · Family Nurse Practitioner · Thousand Oaks, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karen Popp, N.P. is a Family Nurse Practitioner provider in Thousand Oaks, CA (NPI 1588744791).
Provider details
- NPI number
- 1588744791
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- N.P.
- Sex
- Female
- Sole proprietor
- No
- License
- 515438 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Nursing Service Providers
Nursing Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 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
475 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 172 | $82 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 138 | $115 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 56 | $118 |
| Urinalysis, Manual Test81002 | 29 | $3 |
| Administration of Influenza Virus VaccineG0008 | 26 | $28 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 63 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 197 | 53 |
| Amlodipine Besylate | 179 | 48 |
| Atorvastatin Calcium | 172 | 45 |
| Lisinopril | 156 | 45 |
| Gabapentin | 99 | 29 |
| Simvastatin | 94 | 30 |
| Omeprazole | 79 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$209 across 12 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
- 2006-10-16
- Last updated
- 2020-02-26
- Certified
- 2020-02-26
Frequently asked questions
- What is Karen Popp's NPI number?
- Karen Popp's National Provider Identifier (NPI) is 1588744791, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Popp's specialty?
- Karen Popp is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Karen Popp located?
- Karen Popp's practice location on file with NPPES is 2100 Lynn Rd Ste 205, Thousand Oaks, CA 91360-8040.
- What is Karen Popp's phone number?
- The practice phone number listed in the NPPES registry for Karen Popp is (805) 497-3585.
- Does Karen Popp accept Medicare?
- Karen Popp is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karen Popp's NPI active?
- Yes — Karen Popp's NPI (1588744791) is active in the NPPES registry as of the last update on 2020-02-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.