1. Home
  2. Directory
  3. California
  4. Orange
  5. Pediatrics
  6. NPI Profile

HILLARY ZIEVE M.D.
NPI 1831500131
Pediatrics in Orange, CA

Active since May 08, 2014PECOS Enrolled
505 S MAIN ST, SUITE 525, ORANGE, CA 92868(714) 456-5631(714) 285-0389 Get Directions Write a Review

NPPES record last updated: December 5, 2017. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Dec 5, 2017, Dec 3, 2015 (2 updates tracked since 2015).

About Hillary Zieve M.d. NPPES

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

HILLARY ZIEVE M.D. (NPI 1831500131) is an individual pediatrics provider in Orange, California, licensed in California (138626) and active in the NPI registry since May 2014. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1831500131
Entity TypeIndividualFemale
Primary Taxonomy208000000X
Provider Legal NameHILLARY ZIEVECredential: M.D.
Location Address505 S MAIN ST, SUITE 525Orange, CA 92868-4509
Mailing Address505 S Main St, Suite 525Orange, CA 92868-4509 · (714) 456-5631 · Fax (714) 285-0389
Phone(714) 456-5631
Fax(714) 285-0389
Sole ProprietorNo
Enumeration DateMay 8, 2014
Last NPPES UpdateDecember 5, 20172 updates tracked since enumeration
✔ NPI 1831500131 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians
Taxonomy Code208000000X
License✔ Licensed in CA · 138626
Definition
A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.
505 S MAIN ST, Orange, CA 92868
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 (PECOS)

Hillary Zieve M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 Reassignments

2

Medicare enrollment records show Hillary Zieve reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Uc Regents Uci Dept Of Pediatrics
1.4 mi
Pediatrics
101 THE CITY DR S
Orange, CA 92868
  • Reassigned Medicare billing, California enrollment
  • 143 clinicians in this Medicare group
NPI 1235187311 (714) 456-8068
University Of California Irvine
3.0 mi
Federally Qualified Health Center (FQHC)
800 N MAIN ST
Santa Ana, CA 92701
  • Reassigned Medicare billing, California enrollment
  • 255 clinicians in this Medicare group
NPI 1851325906 (714) 456-6785

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 92868 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
$96.36 typical visit price
range $62.96 – $187.60
Typical copayment $24.09 (range $15.74 – $46.90)
Most-billed visit code 99203
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.

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.

DR. RYAN MICHAEL SMITH M.D.
Pediatrics
505 S MAIN ST
ORANGE, CA 92868
Orange County (714) 456-5631
MICHAEL ROSS RN
Case Manager/Care Coordinator
505 S MAIN ST
ORANGE, CA 92868
Orange County (907) 299-1410
KIMBERLY PETERSON NP
Nurse Practitioner (Pediatrics)
505 S MAIN ST
ORANGE, CA 92868
Orange County (714) 509-3939
DR. SUSAN WONG M.D.
Student in an Organized Health Care Education/Training Program
505 S MAIN ST, SUITE 525
ORANGE, CA 92868
Orange County (714) 456-5631
GALANT AND LIN MD'S INC.
Allergy & Immunology
505 S MAIN ST, STE 250
ORANGE, CA 92868
Orange County (714) 771-7994
DR. JORDAN FISHER M.D.
Pediatrics
505 S MAIN ST, SUITE 1200
ORANGE, CA 92868
Orange County (714) 509-8826
AHMED ABDELHALIM ABDELAZIZ ALI M.D.
Urology (Pediatric Urology)
505 S MAIN ST, SUITE 100
ORANGE, CA 92868
Orange County (714) 509-3914
MAYURIKA BANERJEE BARTENSTEIN
Student in an Organized Health Care Education/Training Program
505 S MAIN ST, SUITE 525
ORANGE, CA 92868
Orange County (714) 456-5631

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 Hillary Zieve's NPI number?

The NPI number for Hillary Zieve is 1831500131. It was assigned to this individual provider in the NPPES registry on May 8, 2014.

Where is Hillary Zieve located?

Hillary Zieve practices at 505 S Main St Suite 525, Orange, CA 92868. The listed phone number is (714) 456-5631.

What is Hillary Zieve's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

Is Hillary Zieve enrolled in Medicare?

Yes. Hillary Zieve is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Hillary Zieve's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Hillary Zieve reassigns Medicare benefits to 2 organizations: Uc Regents Uci Dept Of Pediatrics (Orange, CA) and University Of California Irvine (Santa Ana, 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 Hillary Zieve'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 Hillary Zieve was last updated on December 5, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.