XIAOYU CAO MD
NPI 1851850655
Internal Medicine - Critical Care Medicine in Stanford, CA
About Xiaoyu Cao Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
XIAOYU CAO MD (NPI 1851850655) is an individual critical care medicine provider in Stanford, California, licensed in California (A179708) and active in the NPI registry since March 2019. She is enrolled in Medicare PECOS, maintains a secondary practice location in Palo Alto, and is a graduate of University Of California, San Francisco School Of Medicine (2019).
NPPES Registry Identity
Specialties & Licenses 3
Other Names 1
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
Xiaoyu Cao 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 Reassignments
3Medicare enrollment records show Xiaoyu Cao reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Stanford, CA 94305
- Reassigned Medicare billing, California enrollment
- 4,258 clinicians in this Medicare group
Palo Alto, CA 94304
- Reassigned Medicare billing, California enrollment
- 3,617 clinicians in this Medicare group
Newark, CA 94560
- Reassigned Medicare billing, California enrollment
- 435 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 94305 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.
STANFORD, CA 94305
STANFORD, CA 94305
STANFORD, CA 94305
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 Xiaoyu Cao's NPI number?
The NPI number for Xiaoyu Cao is 1851850655. It was assigned to this individual provider in the NPPES registry on March 19, 2019. The provider is also known as Carrie Cao.
Where is Xiaoyu Cao located?
Xiaoyu Cao practices at 300 Pasteur Dr, Stanford, CA 94305. The listed phone number is (650) 723-4000.
What is Xiaoyu Cao's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Critical Care Medicine, with taxonomy code 207RC0200X.
Is Xiaoyu Cao enrolled in Medicare?
Yes. Xiaoyu Cao 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 organizations bill Medicare for Xiaoyu Cao's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Xiaoyu Cao reassigns Medicare benefits to 3 organizations: Stanford Health Care (Stanford, CA), Lpch Medical Group Div Of Lucile (Palo Alto, CA) and University Healthcare Alliance (Newark, CA). Each 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 Xiaoyu Cao'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 Xiaoyu Cao was last updated on October 1, 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.
# Xiaoyu Cao, MD · NPI 1851850655
Critical Care Medicine physician in Stanford, California. Individual provider, active in the CMS NPPES registry since March 19, 2019.
## Identity
- **NPI:** 1851850655 (Entity type: Individual)
- **Enumerated:** March 19, 2019
- **Primary specialty:** Internal Medicine - Critical Care Medicine · taxonomy 207RC0200X
- **State license:** A179708 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 300 PASTEUR DR, Stanford, CA 94305-2200
- **Phone:** (650) 723-4000
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Stanford Health Care (NPI 1437292927, Stanford, CA); Lpch Medical Group Div Of Lucile (NPI 1417907940, Palo Alto, CA); University Healthcare Alliance (NPI 1760531198, Newark, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of California, San Francisco School Of Medicine, class of 2019
## Record status
- **NPPES last updated:** October 1, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1851850655) · Data from the CMS NPPES public registry.