GARRISON MATTHEW TONG MD
NPI 1639240609
Internal Medicine - Endocrinology, Diabetes & Metabolism in Los Angeles, CA
About Garrison Matthew Tong Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GARRISON MATTHEW TONG MD (NPI 1639240609) is an individual endocrinology, diabetes & metabolism provider in Los Angeles, California, licensed in California (A70113) and active in the NPI registry since November 2006. He is enrolled in Medicare PECOS and is a graduate of University Of California, San Diego School Of Medicine (1998).
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Garrison Matthew Tong Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Garrison Tong reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Los Angeles, CA 90027
- Reassigned Medicare billing, California enrollment
- 13,921 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 90027 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
LOS ANGELES, CA 90027
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 Garrison Tong's NPI number?
The NPI number for Garrison Tong is 1639240609. It was assigned to this individual provider in the NPPES registry on November 13, 2006.
Where is Garrison Tong located?
Garrison Tong practices at 4733 W Sunset Blvd, Los Angeles, CA 90027. The listed phone number is (323) 783-4011.
What is Garrison Tong's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.
Is Garrison Tong enrolled in Medicare?
Yes. Garrison Tong is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Garrison Tong's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Garrison Tong reassigns Medicare benefits to Southern California Permanente Medical Group (Los Angeles, CA). The 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 Garrison Tong's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Garrison Tong was last updated on November 30, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Garrison Matthew Tong, MD · NPI 1639240609
Endocrinology, Diabetes & Metabolism physician in Los Angeles, California. Individual provider, active in the CMS NPPES registry since November 13, 2006.
## Identity
- **NPI:** 1639240609 (Entity type: Individual)
- **Enumerated:** November 13, 2006
- **Primary specialty:** Internal Medicine - Endocrinology, Diabetes & Metabolism · taxonomy 207RE0101X
- **State license:** A70113 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 4733 W SUNSET BLVD, Los Angeles, CA 90027-6021
- **Phone:** (323) 783-4011
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Southern California Permanente Medical Group (NPI 1134151657, Los Angeles, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of California, San Diego School Of Medicine, class of 1998
## Record status
- **NPPES last updated:** November 30, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1639240609) · Data from the CMS NPPES public registry.