Karla Lopez, FNP
NPI 1578082939 · Family Nurse Practitioner · Fontana, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karla Lopez, FNP is a Family Nurse Practitioner provider in Fontana, CA (NPI 1578082939).
Provider details
- NPI number
- 1578082939
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP
- Sex
- Female
- Sole proprietor
- No
- License
- 95007422 (CA)
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
8 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
168 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 | 54 | $117 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 29 | $83 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 29 | $121 |
| Hemoglobin A1c Level83036 | 22 | $10 |
| Administration of Influenza Virus VaccineG0008 | 19 | $33 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 15 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 73 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 267 | 106 |
| Metformin Hcl | 159 | 62 |
| Amlodipine Besylate | 130 | 46 |
| Semaglutidebrand: Ozempic | 115 | 26 |
| Lisinopril | 108 | 43 |
| Alendronate Sodium | 88 | 35 |
| Albuterol Sulfate |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,059 across 45 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
- 2017-09-15
- Last updated
- 2025-02-24
- Certified
- 2025-02-24
Frequently asked questions
- What is Karla Lopez's NPI number?
- Karla Lopez's National Provider Identifier (NPI) is 1578082939, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karla Lopez's specialty?
- Karla Lopez is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Karla Lopez located?
- Karla Lopez's practice location on file with NPPES is 16465 Sierra Lakes Pkwy Ste 300, Fontana, CA 92336-1242.
- What is Karla Lopez's phone number?
- The practice phone number listed in the NPPES registry for Karla Lopez is (909) 429-2864.
- Does Karla Lopez accept Medicare?
- Karla Lopez is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karla Lopez's NPI active?
- Yes — Karla Lopez's NPI (1578082939) is active in the NPPES registry as of the last update on 2025-02-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.