SOUTHERN CALIFORNIA INTERNISTS MEDICAL GROUP
NPI 1689203374
Internal Medicine in Pasadena, CA
About Southern California Internists Medical Group NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
SOUTHERN CALIFORNIA INTERNISTS MEDICAL GROUP (NPI 1689203374) is a healthcare organization registered as an internal medicine in Pasadena, California and active in the NPI registry since April 2020. The organization holds a CLIA Waiver certificate valid through July 20, 2028 and lists Gregor Paronian, President, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Group Practice 1
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 Internists Medical Group is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
3Medicare enrollment records show 3 clinicians reassign Medicare billing to Southern California Internists Medical Group, which bills Medicare for the services they deliver. Of these, 3 practice within 10 miles. They are listed nearest first.
Clinicians, nearest first (3)
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
CLIA Laboratory Certificates CMS CLIA
Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.
Certificate of Waiver 05D2188712
Southern California Internists Medical Group · Pasadena, CAFrequently 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 Internists Medical Group's NPI number?
The NPI number for Southern California Internists Medical Group is 1689203374. It was assigned to this organization in the NPPES registry on April 4, 2020.
Where is Southern California Internists Medical Group located?
Southern California Internists Medical Group is located at 1713 E Walnut St, Pasadena, CA 91106. The listed phone number is (818) 482-5500.
What is Southern California Internists Medical Group's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Southern California Internists Medical Group enrolled in Medicare?
Yes. Southern California Internists Medical Group is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Southern California Internists Medical Group?
According to the CMS Revalidation Reassignment List (October 2026 release), 3 clinicians reassign their Medicare billing to Southern California Internists Medical Group, in Internal Medicine and Nurse Practitioner. 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, 3 practice within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Does Southern California Internists Medical Group hold a CLIA laboratory certificate?
Yes. A Certificate of Waiver (number 05D2188712) is associated with this NPI, valid through July 20, 2028. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.
When was this NPI record last updated?
The NPPES record for Southern California Internists Medical Group was last updated on April 4, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.
# Southern California Internists Medical Group · NPI 1689203374
Internal Medicine organization in Pasadena, California. Organization record, active in the CMS NPPES registry since April 4, 2020.
## Identity
- **NPI:** 1689203374 (Entity type: Organization)
- **Enumerated:** April 4, 2020
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **Organization subpart:** No
- **Authorized official:** Gregor Paronian, PRESIDENT
## Practice location
- **Address:** 1713 E WALNUT ST, Pasadena, CA 91106-1611
- **Phone:** (818) 482-5500
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 3 clinicians in 2 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Nurse Practitioner (2), Internal Medicine (1); 3 practice within 10 miles · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** April 4, 2020
- **CLIA laboratory certificates:** 1 on file
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Source: [NPI Profile](https://npiprofile.com/npi/1689203374) · Data from the CMS NPPES public registry.