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NATHAN S CHUNG MD INC
NPI 1144455148
Surgery in Los Alamitos, CA

Active since May 19, 2009
3801 KATELLA AVE STE 420, LOS ALAMITOS, CA 90720(562) 598-2439(562) 598-0022 Get Directions Write a Review

NPPES record last updated: May 19, 2009. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Nathan S Chung Md Inc NPPES

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

NATHAN S CHUNG MD INC (NPI 1144455148) is a healthcare organization registered as a surgery in Los Alamitos, California and active in the NPI registry since May 2009. The organization lists Nathan S Chung, President, as its authorized official.

NPPES Registry Identity

NPI1144455148
Entity TypeOrganization
Primary Taxonomy208600000X
Legal Business NameNATHAN S CHUNG MD INC
Location Address3801 KATELLA AVE STE 420Los Alamitos, CA 90720-6903
Mailing Address5 Holland Ste 101Irvine, CA 92618-2568 · (949) 588-2190 · Fax (949) 588-2199
Phone(562) 598-2439
Fax(562) 598-0022
Organization SubpartNo
Authorized OfficialNathan S ChungPresident · (949) 588-2190
Enumeration DateMay 19, 2009
✔ NPI 1144455148 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySurgeryAllopathic & Osteopathic Physicians
Taxonomy Code208600000X
Definition
A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.
3801 KATELLA AVE STE 420, Los Alamitos, CA 90720
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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)

Nathan S Chung Md Inc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Nathan S Chung MD Inc, which bills Medicare for the services this clinician delivers.

Clinician (1)

Nathan Chung, MD
General Surgery
NPI 1144249152
19341 BEAR VALLEY ROAD SUITE 205
Apple Valley, CA 92308
(760) 247-0333
✔ PECOS✔ Accepts Medicare66 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 Nathan S Chung MD Inc's NPI number?

The NPI number for Nathan S Chung MD Inc is 1144455148. It was assigned to this organization in the NPPES registry on May 19, 2009.

Where is Nathan S Chung MD Inc located?

Nathan S Chung MD Inc is located at 3801 Katella Ave Ste 420, Los Alamitos, CA 90720. The listed phone number is (562) 598-2439.

What is Nathan S Chung MD Inc's specialty?

The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.

Is Nathan S Chung MD Inc enrolled in Medicare?

Yes. Nathan S Chung MD Inc is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Nathan S Chung MD Inc?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (General Surgery) reassigns their Medicare billing to Nathan S Chung MD Inc. 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. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Nathan S Chung MD Inc was last updated on May 19, 2009. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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.