Victoria Zylstra Lopez, MD
Internal Medicine Physician · Porterville, CA
Victoria Zylstra Lopez, MD is an internal medicine physician with a practice address in Porterville, California, and NPI 1255900585, issued on Jun 21, 2021. Check the license (California A191603, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Victoria Zylstra Lopez
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A191603 CA
Self-reported in NPPES; status is on the state search - Practice location
- 465 W Putnam Ave, Porterville, CA 93257
- Phone
- (559) 784-1110
- Enumerated
- Jun 21, 2021
- Record last updated
- Mar 21, 2024
- Medicare enrollment
- Enrolled (PECOS I20240701000449); accepts Medicare assignment
- Entity
- Type 1 · individual
Also registered at 465 W Putnam Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Victoria Zylstra Lopez in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A191603Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
95% fewer Medicare Part D claims than the average internal medicine physician in 2024
153 Medicare Part D claims for 57 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims.
Most prescribed
- Atorvastatin Calcium15 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $59.80
3 payments; by number, the most common kind was food and beverage; the largest payer was Novartis Pharmaceuticals Corporation. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Hospitalists OF Modesto Medical Group IncModesto, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
32 internal medicine physician records list a practice address in Porterville
They are 32 of the 795 NPPES records with a practice address in Porterville, and 17,696 internal medicine physician records in California.
All 32 in Porterville → All 17,696 in California → Every provider in Porterville →
Other internal medicine physician records in California
- Jacob Aaron, MDSan Francisco, CA1407202518
- Alistair Aaronson, MDStanford, CA1457628760
- Jose Abad., MDSacramento, CA1144607219
- Donna Abare, MDOakland, CA1386722155
- Marce AbareScotts Valley, CA1457744708
- Samuel Abarte, M.D.Chula Vista, CA1578535498
- Alexander Abary, MDLong Beach, CA1104995919
- Luba Abascal, MDSan Francisco, CA1023180874
- Michael Abate, MDSacramento, CA1548248131
- Wali Abawi, D.O.Joshua Tree, CA1104362268
Common questions
What is Victoria Zylstra Lopez, MD's NPI number?
Victoria Zylstra Lopez, MD's National Provider Identifier (NPI) is 1255900585, issued on Jun 21, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Victoria Zylstra Lopez, MD located?
The NPPES record lists a practice address at 465 W Putnam Ave, Porterville, CA, 93257. Phone: (559) 784-1110. Providers update this record themselves, so call before visiting.
How can I verify Victoria Zylstra Lopez, MD's license?
NPPES lists California license number A191603, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Victoria Zylstra Lopez, MD prescribe under Medicare Part D?
In 2024, Victoria Zylstra Lopez, MD had 153 Medicare Part D claims for 57 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.