SOUTHERN CALIFORNIA INFECTIOUS DISEASE MEDICAL GROUP
NPI 1639100662
Internal Medicine - Infectious Disease in Westlake Village, CA

Q: What is Southern California Infectious Disease Medical Group's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.

Active since July 06, 2006

2325 TOWNSGATE RD, SUITE 100, WESTLAKE VILLAGE, CA 91361(213) 483-0901(213) 483-6650 Get Directions Write a Review

NPPES record last updated: December 4, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

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About Southern California Infectious Disease Medical Group NPPES

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

SOUTHERN CALIFORNIA INFECTIOUS DISEASE MEDICAL GROUP (NPI 1639100662) is a healthcare organization registered as an infectious disease in Westlake Village, California and active in the NPI registry since July 2006. The organization lists Suman Radhakrishna, Md/partner, as its authorized official.

NPPES Registry Identity

NPI1639100662

Entity TypeOrganization

Primary Taxonomy207RI0200X

Legal Business NameSOUTHERN CALIFORNIA INFECTIOUS DISEASE MEDICAL GROUP

Location Address2325 TOWNSGATE RD, SUITE 100Westlake Village, CA 91361-5986

Mailing AddressPo Box 2190La Habra, CA 90632-2190 · (213) 483-0901 · Fax (213) 483-6650

Phone(213) 483-0901

Fax(213) 483-6650

Organization SubpartNo

Authorized OfficialSuman RadhakrishnaMd/partner · (213) 483-0901

Enumeration DateJuly 6, 2006

Last NPPES UpdateDecember 4, 2025

NPPES CertifiedDecember 4, 2025

✔ NPI 1639100662 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Infectious DiseaseAllopathic & Osteopathic Physicians

Taxonomy Code207RI0200X

License✔ Licensed in CA · W11997

Definition

An internist who deals with infectious diseases of all types and in all organ systems. Conditions requiring selective use of antibiotics call for this special skill. This physician often diagnoses and treats AIDS patients and patients with fevers which have not been explained. Infectious disease specialists may also have expertise in preventive medicine and travel medicine.

2325 TOWNSGATE RD, Westlake Village, CA 91361

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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)

Southern California Infectious Disease Medical Group is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 4 clinicians reassign Medicare billing to Southern California Infectious Disease 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 (4)

Joseph Nussbaum, MD

Infectious Disease

NPI 1922033463

2325 TOWNSGATE RD SUITE 100
Westlake Village, CA 91361

(213) 483-0901

✔ PECOS✔ Accepts MedicareSame address

Suman Radhakrishna, MD

Infectious Disease

NPI 1225069248

9001 WILSHIRE BLVD SUITE 203
Beverly Hills, CA 90211

(310) 274-6671

✔ PECOS✔ Accepts Medicare26 mi

Alexander Kim, MD

Infectious Disease

NPI 1881629335

9001 WILSHIRE BLVD SUITE 203
Beverly Hills, CA 90211

(310) 274-6671

✔ PECOS✔ Accepts Medicare26 mi

James Homans, MD

Infectious Disease

NPI 1841398005

1640 MARENGO ST # 300
Los Angeles, CA 90033

(323) 226-5068

✔ PECOS✔ Accepts Medicare36 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 Southern California Infectious Disease Medical Group's NPI number?

The NPI number for Southern California Infectious Disease Medical Group is 1639100662. It was assigned to this organization in the NPPES registry on July 6, 2006.

Where is Southern California Infectious Disease Medical Group located?

Southern California Infectious Disease Medical Group is located at 2325 Townsgate Rd Suite 100, Westlake Village, CA 91361. The listed phone number is (213) 483-0901.

What is Southern California Infectious Disease Medical Group's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.

Is Southern California Infectious Disease Medical Group enrolled in Medicare?

Yes. Southern California Infectious Disease Medical Group is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Southern California Infectious Disease Medical Group?

According to the CMS Revalidation Reassignment List (October 2026 release), 4 clinicians, all in Infectious Disease, reassign their Medicare billing to Southern California Infectious Disease 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 Southern California Infectious Disease Medical Group was last updated on December 4, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 months 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.