Eugenia Zweibach
Internal Medicine Physician · Foothill Ranch, CA
Eugenia Zweibach is an internal medicine physician with a practice address in Foothill Ranch, California, and NPI 1710410550, issued on Apr 8, 2017. Check the license on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Eugenia Zweibach
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 20164 NV
Self-reported in NPPES; status is on the state search - Practice location
- 26672 Portola Pkwy Ste 112, Foothill Ranch, CA 92610
- Phone
- (949) 557-0820
- Enumerated
- Apr 8, 2017
- Record last updated
- Oct 29, 2025
- Medicare enrollment
- Enrolled (PECOS I20251120002131); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Verify Eugenia Zweibach in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of CaliforniaCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% fewer Medicare Part D claims than the average internal medicine physician in 2024
96 Medicare Part D claims for 35 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 53% of claims.
Most prescribed
- Levothyroxine Sodium11 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: $563.05
8 payments; by number, the most common kind was food and beverage; the largest payer was Amgen Inc. 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
- Hoag ClinicFoothill Ranch, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Eugenia Zweibach among 17,696 internal medicine physician records in California
Eugenia Zweibach is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 81% of them.
- NPI issued2017 · 81% of these records are older, 16% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2013 · median 2004 among the 11,065 with a school on file
- Record last updated2025 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Internal Medicine Physician providers in California
There are 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Foothill Ranch → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Susan Davoodifar, M.D.Irvine, CA 926121013287119
- Pamela Lawrence, M.D.Irvine, CA 926121336299734
- Marta Long, MDIrvine, CA 926121205860509
- Juliana Mathewson, M.D.Irvine, CA 926121275709594
- William Tsai, M.D.Irvine, CA 926121952356560
- Grace Chang, M.D.Irvine, CA 926141992877625
- Mamak Eatesam, M.D.Irvine, CA 926061407139314
- Stuart Gilman, MDIrvine, CA 926061184681041
Common questions
What is Eugenia Zweibach's NPI number?
Eugenia Zweibach's National Provider Identifier (NPI) is 1710410550, issued on Apr 8, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Eugenia Zweibach located?
The NPPES record lists a practice address at 26672 Portola Pkwy Ste 112, Foothill Ranch, CA, 92610. Phone: (949) 557-0820. Providers update this record themselves, so call before visiting.
How can I verify Eugenia Zweibach's license?
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 Eugenia Zweibach prescribe under Medicare Part D?
In 2024, Eugenia Zweibach had 96 Medicare Part D claims for 35 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.