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WIELER & SEIN MEDICAL GROUP
NPI 1457448789
Radiology - Diagnostic Radiology in Santa Ana, CA

Active since October 06, 2006
1220 HEMLOCK WAY, SUITE 106, SANTA ANA, CA 92707(888) 407-3975(714) 545-9486 Get Directions Write a Review

NPPES record last updated: August 3, 2015. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Wieler & Sein Medical Group NPPES

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

WIELER & SEIN MEDICAL GROUP (NPI 1457448789) is a healthcare organization registered as a diagnostic radiology in Santa Ana, California and active in the NPI registry since October 2006. The organization lists Patrick Sein, Administrator, as its authorized official.

NPPES Registry Identity

NPI1457448789
Entity TypeOrganization
Primary Taxonomy2085R0202X
Legal Business NameWIELER & SEIN MEDICAL GROUP
Location Address1220 HEMLOCK WAY, SUITE 106Santa Ana, CA 92707-3650
Mailing Address1220 Hemlock Way, Suite 106Santa Ana, CA 92707-3650 · (888) 407-3975 · Fax (714) 545-9486
Phone(888) 407-3975
Fax(714) 545-9486
Organization SubpartNo
Authorized OfficialPatrick SeinAdministrator · (714) 545-9441
Enumeration DateOctober 6, 2006
Last NPPES UpdateAugust 3, 2015
✔ NPI 1457448789 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyRadiology · Diagnostic RadiologyAllopathic & Osteopathic Physicians
Taxonomy Code2085R0202X
Definition
A radiologist who utilizes x-ray, radionuclides, ultrasound and electromagnetic radiation to diagnose and treat disease.
1220 HEMLOCK WAY, Santa Ana, CA 92707
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Other Identifiers 2

Medicare PINHW7709CCA
Medicare PINHW7709CA

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Wieler & Sein Medical Group is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

2

Medicare enrollment records show 2 clinicians reassign Medicare billing to Wieler & Sein Medical Group, which bills Medicare for the services they deliver. Of these, 1 practice at this address. They are listed nearest first.

Clinicians, nearest first (2)

Martin Wieler, M.D.
Diagnostic Radiology
NPI 1689610552
1220 HEMLOCK WAY SUITE 106
Santa Ana, CA 92707
(714) 545-9441
✔ PECOS✔ Accepts MedicareSame address
Alfred Sein, MD
Diagnostic Radiology
NPI 1881830735
8700 BEVERLY BLVD TAPER BLDG. M335
Los Angeles, CA 90048
(310) 423-3095
✔ PECOS✔ Accepts Medicare38 mi

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

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 Wieler & Sein Medical Group's NPI number?

The NPI number for Wieler & Sein Medical Group is 1457448789. It was assigned to this organization in the NPPES registry on October 6, 2006.

Where is Wieler & Sein Medical Group located?

Wieler & Sein Medical Group is located at 1220 Hemlock Way Suite 106, Santa Ana, CA 92707. The listed phone number is (888) 407-3975.

What is Wieler & Sein Medical Group's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.

Is Wieler & Sein Medical Group enrolled in Medicare?

Yes. Wieler & Sein Medical Group is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Wieler & Sein Medical Group?

According to the CMS Revalidation Reassignment List (October 2026 release), 2 clinicians, all in Diagnostic Radiology, reassign their Medicare billing to Wieler & Sein Medical Group. A 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 the clinician's services. Of these, 1 practice at this address. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Wieler & Sein Medical Group was last updated on August 3, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.