DR. VICTORIA ZYLSTRA LOPEZ MD
NPI 1255900585
Internal Medicine in Porterville, CA
About Dr. Victoria Zylstra Lopez Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. VICTORIA ZYLSTRA LOPEZ MD (NPI 1255900585) is an individual internal medicine provider in Porterville, California, licensed in California (A191603) and active in the NPI registry since June 2021. She is enrolled in Medicare PECOS and is a graduate of Other (2021).
NPPES Registry Identity
Specialties & Licenses 3
Other Names 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Victoria Zylstra Lopez Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
3Medicare enrollment records show Victoria Lopez reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Porterville, CA 93257
- Reassigned Medicare billing, California enrollment
- 159 clinicians in this Medicare group
Modesto, CA 95350
- Reassigned Medicare billing, California enrollment
- 176 clinicians in this Medicare group
San Francisco, CA 94111
- Reassigned Medicare billing, California enrollment
- 407 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 93257 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
PORTERVILLE, CA 93257
PORTERVILLE, CA 93257
PORTERVILLE, CA 93257
PORTERVILLE, CA 93257
PORTERVILLE, CA 93257
PORTERVILLE, CA 93257
PORTERVILLE, CA 93257
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Victoria Lopez's NPI number?
The NPI number for Victoria Lopez is 1255900585. It was assigned to this individual provider in the NPPES registry on June 21, 2021. The provider is also known as Miss Victoria Nicole Zylstra.
Where is Victoria Lopez located?
Victoria Lopez practices at 465 W Putnam Ave, Porterville, CA 93257. The listed phone number is (559) 784-1110.
What is Victoria Lopez's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Victoria Lopez enrolled in Medicare?
Yes. Victoria Lopez is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Victoria Lopez's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Victoria Lopez reassigns Medicare benefits to 3 organizations: 24 On Physicians Of California, PC (Porterville, CA), Hospitalists Of Modesto Medical Group Inc (Modesto, CA) and Signify Health Medical Associates Of California, PC (San Francisco, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Victoria Lopez's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Victoria Lopez was last updated on March 21, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Victoria Zylstra Lopez, MD · NPI 1255900585
Internal Medicine physician in Porterville, California. Individual provider, active in the CMS NPPES registry since June 21, 2021.
## Identity
- **NPI:** 1255900585 (Entity type: Individual)
- **Enumerated:** June 21, 2021
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** A191603 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 465 W PUTNAM AVE, Porterville, CA 93257-3320
- **Phone:** (559) 784-1110
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): 24 On Physicians Of California, PC (NPI 1730570565, Porterville, CA); Hospitalists Of Modesto Medical Group Inc (NPI 1821190711, Modesto, CA); Signify Health Medical Associates Of California, PC (NPI 1124685169, San Francisco, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2021
## Record status
- **NPPES last updated:** March 21, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1255900585) · Data from the CMS NPPES public registry.