1. Home
  2. Directory
  3. California
  4. Foothill Ranch
  5. Internal Medicine
  6. NPI Profile
Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

EUGENIA ZWEIBACH
NPI 1710410550
Internal Medicine - Endocrinology, Diabetes & Metabolism in Foothill Ranch, CA

Active since April 08, 2017PECOS Enrolled
26672 PORTOLA PKWY STE 112, FOOTHILL RANCH, CA 92610(949) 557-0820 Get Directions Write a Review

NPPES record last updated: October 23, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Eugenia Zweibach NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

EUGENIA ZWEIBACH (NPI 1710410550) is an individual endocrinology, diabetes & metabolism provider in Foothill Ranch, California, licensed in California (A185205) and active in the NPI registry since April 2017. She is enrolled in Medicare PECOS and is a graduate of Other (2013).

NPPES Registry Identity

NPI1710410550
Entity TypeIndividualFemale
Primary Taxonomy207RE0101X
Provider Legal NameEUGENIA ZWEIBACH
Location Address26672 PORTOLA PKWY STE 112Foothill Ranch, CA 92610-1773
Mailing Address26672 Portola Pkwy Ste 112Foothill Ranch, CA 92610-1773 · (949) 557-0820
Phone(949) 557-0820
Sole ProprietorNo
Medical School CMSOtherGraduated 2013
Enumeration DateApril 8, 2017
Last NPPES UpdateOctober 23, 2026
NPPES CertifiedOctober 23, 2026
✔ NPI 1710410550 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Endocrinology, Diabetes & MetabolismAllopathic & Osteopathic Physicians
Taxonomy Code207RE0101X
License✔ Licensed in CA · A185205
Definition
An internist who concentrates on disorders of the internal (endocrine) glands such as the thyroid and adrenal glands. This specialist also deals with disorders such as diabetes, metabolic and nutritional disorders, obesity, pituitary diseases and menstrual and sexual problems.
Also ListedInternal MedicineTaxonomy 207R00000X · License 20164 (NV)
26672 PORTOLA PKWY STE 112, Foothill Ranch, CA 92610
Open in Google Maps ↗

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

Eugenia Zweibach 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.

PECOS PAC ID1355612219
PECOS Enrollment IDI20251120002131
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Eugenia Zweibach reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Hoag Clinic
15 mi
Primary Care
510 SUPERIOR AVE
Newport Beach, CA 92663
  • Reassigned Medicare billing, California enrollment
  • 529 clinicians in this Medicare group
NPI 1942799523 (949) 791-3001

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92610 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$142.39 typical visit price
range $62.96 – $187.60
Typical copayment $35.59 (range $15.74 – $46.90)
Most-billed visit code 99204
Established Patient
$109.96 typical visit price
range $20.84 – $153.61
Typical copayment $27.49 (range $5.21 – $38.40)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Referred Medical Equipment & Supplies CMS DME claims 2

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing E0431
DME-Oxygen and Supplies · category DC000N
2 suppliers26 claims26 services$12.55 avg. paid by Medicare
Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate E1390
DME-Oxygen and Supplies · category DC002N
2 suppliers26 claims26 services$55.10 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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 Eugenia Zweibach's NPI number?

The NPI number for Eugenia Zweibach is 1710410550. It was assigned to this individual provider in the NPPES registry on April 8, 2017.

Where is Eugenia Zweibach located?

Eugenia Zweibach practices at 26672 Portola Pkwy Ste 112, Foothill Ranch, CA 92610. The listed phone number is (949) 557-0820.

What is Eugenia Zweibach's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.

Is Eugenia Zweibach enrolled in Medicare?

Yes. Eugenia Zweibach 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 organization bills Medicare for Eugenia Zweibach's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Eugenia Zweibach reassigns Medicare benefits to Hoag Clinic (Newport Beach, CA). The 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 Eugenia Zweibach'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 Eugenia Zweibach was last updated on October 23, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 days 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.