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EL SERENO MEDICAL GROUP INC
NPI 1336189117
Family Medicine in Los Angeles, CA

Active since June 08, 2006
3301 N EASTERN AVE, LOS ANGELES, CA 90032(323) 225-2351(323) 225-7555 Get Directions Write a Review

NPPES record last updated: October 11, 2007. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About El Sereno Medical Group Inc NPPES

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

EL SERENO MEDICAL GROUP INC (NPI 1336189117) is a healthcare organization registered as a family medicine in Los Angeles, California and active in the NPI registry since June 2006. The organization lists An Pang Chieng, Owner/president, as its authorized official.

NPPES Registry Identity

NPI1336189117
Entity TypeOrganization
Primary Taxonomy207Q00000X
Legal Business NameAN PANG CHIENG MD A PROFESSIONAL CORPORATION
Location Address3301 N EASTERN AVELos Angeles, CA 90032-1931
Mailing Address3301 N Eastern AveLos Angeles, CA 90032-1931 · (323) 225-2351 · Fax (323) 225-7555
Phone(323) 225-2351
Fax(323) 225-7555
Organization SubpartNo
Authorized OfficialAn Pang ChiengOwner/president · (323) 225-2351
Enumeration DateJune 8, 2006
Last NPPES UpdateOctober 11, 2007
✔ NPI 1336189117 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
License✔ Licensed in CA · 20A8055
Definition
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
Also ListedInternal MedicineTaxonomy 207R00000X · License G66648 (CA)
Also ListedGeneral PracticeTaxonomy 208D00000X · License A48048 (CA)
3301 N EASTERN AVE, Los Angeles, CA 90032
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Other Names 1

Other NameEl Sereno Medical Group Inc

Other Identifiers 9

Medicare ID-Type UnspecifiedWG66648ACA · Dr. An Pang Chieng
Medicare ID-Type UnspecifiedW20A8055BCA · Dr. James N. Wang
Medicaid00AX80550CA
Medicare UPINF14971CA
Medicaid00G666480CA
Medicaid00A480480CA
Medicare UPINE47712CA
Medicare UPINI00308CA
Medicare ID-Type UnspecifiedWA48048CCA · Dr. Wei-der Show

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-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)

El Sereno Medical Group Inc 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 El Sereno Medical Group Inc, which bills Medicare for the services they deliver. Of these, 2 practice at this address. They are listed nearest first.

Clinicians, nearest first (2)

An Pang Chieng, M.D.
Internal Medicine
NPI 1821030305
3301 N EASTERN AVE
Los Angeles, CA 90032
(323) 225-2351
✔ PECOS✔ Accepts MedicareSame address
Wei Show, M.D.
General Practice
NPI 1386686889
3301 N EASTERN AVE
Los Angeles, CA 90032
(323) 225-2351
✔ PECOSSame address

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 An Pang Chieng MD A Professional Corporation's NPI number?

The NPI number for An Pang Chieng MD A Professional Corporation is 1336189117. It was assigned to this organization in the NPPES registry on June 8, 2006. The provider is also known as El Sereno Medical Group Inc.

Where is An Pang Chieng MD A Professional Corporation located?

An Pang Chieng MD A Professional Corporation is located at 3301 N Eastern Ave, Los Angeles, CA 90032. The listed phone number is (323) 225-2351.

What is An Pang Chieng MD A Professional Corporation's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Is An Pang Chieng MD A Professional Corporation enrolled in Medicare?

Yes. An Pang Chieng MD A Professional Corporation is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through An Pang Chieng MD A Professional Corporation?

According to the CMS Revalidation Reassignment List (October 2026 release), 2 clinicians reassign their Medicare billing to An Pang Chieng MD A Professional Corporation, in General Practice and Internal Medicine. 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, 2 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 An Pang Chieng MD A Professional Corporation was last updated on October 11, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.