CAROLINE KOO MD
NPI 1093917254
Physical Medicine & Rehabilitation in Union City, CA
About Caroline Koo Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
CAROLINE KOO MD (NPI 1093917254) is an individual physical medicine & rehabilitation provider in Union City, California, licensed in New Hampshire (0563) and active in the NPI registry since June 2007. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Caroline Koo Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Caroline Koo reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Redwood City, CA 94063
- Reassigned Medicare billing, California enrollment
- 20,078 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.
Other Providers at the Same Location NPPES 4
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
UNION CITY, CA 94587
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 Caroline Koo's NPI number?
The NPI number for Caroline Koo is 1093917254. It was assigned to this individual provider in the NPPES registry on June 1, 2007.
Where is Caroline Koo located?
Caroline Koo practices at 3553 Whipple Rd Fl 2, Union City, CA 94587. The listed phone number is (510) 675-3070.
What is Caroline Koo's specialty?
The primary specialty registered for this NPI is Physical Medicine & Rehabilitation with taxonomy code 208100000X.
Is Caroline Koo enrolled in Medicare?
Yes. Caroline Koo is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Caroline Koo's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Caroline Koo reassigns Medicare benefits to Permanente Medical Group Inc (Redwood City, 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 Caroline Koo's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Caroline Koo accept?
Health plans from Taro Health list Caroline Koo as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Caroline Koo was last updated on May 13, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.