GARRETT CHAN MD
NPI 1629728449
Internal Medicine in Fremont, CA
About Garrett Chan Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GARRETT CHAN MD (NPI 1629728449) is an individual internal medicine provider in Fremont, California, licensed in California (A201129) and active in the NPI registry since March 2022. He is enrolled in Medicare PECOS, maintains a secondary practice location in Milpitas, and is a graduate of Other (2022).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
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
Garrett Chan 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 Garrett Chan reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Palo Alto, CA 94301
- Reassigned Medicare billing, California enrollment
- 4,479 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 94538 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.
FREMONT, CA 94538
FREMONT, CA 94538
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 Garrett Chan's NPI number?
The NPI number for Garrett Chan is 1629728449. It was assigned to this individual provider in the NPPES registry on March 25, 2022.
Where is Garrett Chan located?
Garrett Chan practices at 3200 Kearney St, Fremont, CA 94538. The listed phone number is (800) 478-8837.
What is Garrett Chan's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Garrett Chan enrolled in Medicare?
Yes. Garrett Chan 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 Garrett Chan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Garrett Chan reassigns Medicare benefits to Sutter Bay Medical Foundation (Palo Alto, 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 Garrett Chan'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 Garrett Chan was last updated on October 28, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.
# Garrett Chan, MD · NPI 1629728449
Internal Medicine physician in Fremont, California. Individual provider, active in the CMS NPPES registry since March 25, 2022.
## Identity
- **NPI:** 1629728449 (Entity type: Individual)
- **Enumerated:** March 25, 2022
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** A201129 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 3200 KEARNEY ST, Fremont, CA 94538-2299
- **Phone:** (800) 478-8837
## 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:** Sutter Bay Medical Foundation (NPI 1013950807, Palo Alto, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2022
## Record status
- **NPPES last updated:** October 28, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1629728449) · Data from the CMS NPPES public registry.