GEMMA TH KO,MD. INC.
NPI 1184633620
Internal Medicine in Pico Rivera, CA
About Gemma Th Ko,md. Inc. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GEMMA TH KO,MD. INC. (NPI 1184633620) is a healthcare organization registered as an internal medicine in Pico Rivera, California and active in the NPI registry since August 2006. The organization lists Michele Mary Guzman, Office Manager, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 3
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)
Gemma Th Ko,md. Inc. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
2Medicare enrollment records show 2 clinicians reassign Medicare billing to Gemma Th Ko,md. 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)
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 Gemma Th Ko,md. Inc.'s NPI number?
The NPI number for Gemma Th Ko,md. Inc. is 1184633620. It was assigned to this organization in the NPPES registry on August 5, 2006.
Where is Gemma Th Ko,md. Inc. located?
Gemma Th Ko,md. Inc. is located at 4511 Rosemead Blvd, Pico Rivera, CA 90660. The listed phone number is (562) 692-3388.
What is Gemma Th Ko,md. Inc.'s specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Gemma Th Ko,md. Inc. enrolled in Medicare?
Yes. Gemma Th Ko,md. Inc. is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Gemma Th Ko,md. Inc.?
According to the CMS Revalidation Reassignment List (October 2026 release), 2 clinicians, all in Internal Medicine, reassign their Medicare billing to Gemma Th Ko,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. 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 Gemma Th Ko,md. Inc. was last updated on February 8, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.
# Gemma Th Ko,md. Inc. · NPI 1184633620
Internal Medicine organization in Pico Rivera, California. Organization record, active in the CMS NPPES registry since August 5, 2006.
## Identity
- **NPI:** 1184633620 (Entity type: Organization)
- **Enumerated:** August 5, 2006
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **Organization subpart:** No
- **Authorized official:** Michele Guzman, OFFICE MANAGER
## Practice location
- **Address:** 4511 ROSEMEAD BLVD, Pico Rivera, CA 90660-2032
- **Phone:** (562) 692-3388
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 2 clinicians (Internal Medicine) reassign Medicare billing to this organization (form CMS-855R); 2 practice at this address · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** February 8, 2010
- **Other identifiers:** Medicare UPIN E58526 (CA); Medicaid 00G708660 (CA); Medicare ID-Type Unspecified G70866 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1184633620) · Data from the CMS NPPES public registry.