REIKO SAKAI MD
NPI 1366805319
Hospitalist in Palo Alto, CA
About Reiko Sakai Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
REIKO SAKAI MD (NPI 1366805319) is an individual hospitalist provider in Palo Alto, California, licensed in California (A162381) and active in the NPI registry since March 2016. She is enrolled in Medicare PECOS and maintains a secondary practice location in Salinas.
NPPES Registry Identity
Specialties & Licenses 2
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 (PECOS)
Reiko Sakai Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Reiko Sakai reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Prunedale, CA 93907
- Reassigned Medicare billing, California enrollment
- 284 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 94304 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.
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 Reiko Sakai's NPI number?
The NPI number for Reiko Sakai is 1366805319. It was assigned to this individual provider in the NPPES registry on March 29, 2016.
Where is Reiko Sakai located?
Reiko Sakai practices at 725 Welch Rd, Palo Alto, CA 94304. The listed phone number is (650) 497-8000.
What is Reiko Sakai's specialty?
The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.
Is Reiko Sakai enrolled in Medicare?
Yes. Reiko Sakai is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Reiko Sakai's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Reiko Sakai reassigns Medicare benefits to County Of Monterey (Prunedale, 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 Reiko Sakai'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 Reiko Sakai was last updated on October 28, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 days 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.
# Reiko Sakai, MD · NPI 1366805319
Hospitalist physician in Palo Alto, California. Individual provider, active in the CMS NPPES registry since March 29, 2016.
## Identity
- **NPI:** 1366805319 (Entity type: Individual)
- **Enumerated:** March 29, 2016
- **Primary specialty:** Hospitalist · taxonomy 208M00000X
- **State license:** A162381 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 725 WELCH RD, Palo Alto, CA 94304-1601
- **Phone:** (650) 497-8000
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** County Of Monterey (NPI 1063151363, Prunedale, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** October 28, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1366805319) · Data from the CMS NPPES public registry.