ALVINA DOR-YAN CHU M.D.
NPI 1538355375
Internal Medicine - Rheumatology in Palo Alto, CA
About Alvina Dor-yan Chu M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ALVINA DOR-YAN CHU M.D. (NPI 1538355375) is an individual rheumatology provider in Palo Alto, California, licensed in California (A89065) and active in the NPI registry since September 2007. She is enrolled in Medicare PECOS, maintains a secondary practice location in Palo Alto, and is a graduate of State University Of New York At Buffalo School Of Medicine (2002).
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
Alvina Dor-yan Chu M.d. 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
2Medicare enrollment records show Alvina Chu reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Palo Alto, CA 94304
- Reassigned Medicare billing, California enrollment
- 3,617 clinicians in this Medicare group
Stanford, CA 94305
- Reassigned Medicare billing, California enrollment
- 4,258 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.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES
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 Alvina Chu's NPI number?
The NPI number for Alvina Chu is 1538355375. It was assigned to this individual provider in the NPPES registry on September 14, 2007.
Where is Alvina Chu located?
Alvina Chu practices at 1000 Welch Rd Ste 203, Palo Alto, CA 94304. The listed phone number is (650) 723-6961.
What is Alvina Chu's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Rheumatology, with taxonomy code 207RR0500X.
Is Alvina Chu enrolled in Medicare?
Yes. Alvina Chu 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 Alvina Chu's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Alvina Chu reassigns Medicare benefits to 2 organizations: Lpch Medical Group Div Of Lucile (Palo Alto, CA) and Stanford Health Care (Stanford, 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 Alvina Chu'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 Alvina Chu was last updated on April 28, 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.
# Alvina Dor-Yan Chu, M.D. · NPI 1538355375
Rheumatology physician in Palo Alto, California. Individual provider, active in the CMS NPPES registry since September 14, 2007.
## Identity
- **NPI:** 1538355375 (Entity type: Individual)
- **Enumerated:** September 14, 2007
- **Primary specialty:** Internal Medicine - Rheumatology · taxonomy 207RR0500X
- **State license:** A89065 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 1000 WELCH RD STE 203, Palo Alto, CA 94304-1808
- **Phone:** (650) 723-6961
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Lpch Medical Group Div Of Lucile (NPI 1417907940, Palo Alto, CA); Stanford Health Care (NPI 1437292927, Stanford, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** State University Of New York At Buffalo School Of Medicine, class of 2002
## Record status
- **NPPES last updated:** April 28, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1538355375) · Data from the CMS NPPES public registry.