Southern California Internists Medical Group
NPI 1689203374 · Internal Medicine Physician · Pasadena, CA
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Southern California Internists Medical Group is a Internal Medicine Physician organization in Pasadena, CA (NPI 1689203374).
Provider details
- NPI number
- 1689203374
- Entity type
- Organization
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Gregor Paronian, President(818) 482-5500
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
6 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2020-04-04
- Last updated
- 2020-04-04
- Certified
- 2020-04-04
Frequently asked questions
- What is Southern California Internists Medical Group's NPI number?
- Southern California Internists Medical Group's National Provider Identifier (NPI) is 1689203374, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Southern California Internists Medical Group?
- Southern California Internists Medical Group is classified in the NPPES registry as Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Southern California Internists Medical Group located?
- Southern California Internists Medical Group's practice location on file with NPPES is 1713 E Walnut St, Pasadena, CA 91106-1611.
- What is Southern California Internists Medical Group's phone number?
- The practice phone number listed in the NPPES registry for Southern California Internists Medical Group is (818) 482-5500.
- Does Southern California Internists Medical Group accept Medicare?
- Southern California Internists Medical Group is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Southern California Internists Medical Group?
- The authorized official listed on Southern California Internists Medical Group's NPPES record is Gregor Paronian, President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Southern California Internists Medical Group's NPI active?
- Yes — Southern California Internists Medical Group's NPI (1689203374) is active in the NPPES registry as of the last update on 2020-04-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.