KAY WEN CHANG MD
NPI 1649318577
Otolaryngology - Pediatric Otolaryngology in Palo Alto, CA
About Kay Wen Chang Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
KAY WEN CHANG MD (NPI 1649318577) is an individual pediatric otolaryngology provider in Palo Alto, California, licensed in California (G85741) and active in the NPI registry since February 2007. He is enrolled in Medicare PECOS, maintains a secondary practice location in Palo Alto, and is a graduate of Warren Alpert Medical School Of Brown University (1992).
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
Other Identifiers 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
Kay Wen Chang 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
2Medicare enrollment records show Kay Chang 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.
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 Kay Chang's NPI number?
The NPI number for Kay Chang is 1649318577. It was assigned to this individual provider in the NPPES registry on February 2, 2007.
Where is Kay Chang located?
Kay Chang practices at 725 Welch Rd, Palo Alto, CA 94304. The listed phone number is (650) 497-8000.
What is Kay Chang's specialty?
The primary specialty registered for this NPI is Otolaryngology, specializing in Pediatric Otolaryngology, with taxonomy code 207YP0228X.
Is Kay Chang enrolled in Medicare?
Yes. Kay Chang 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 Kay Chang's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Kay Chang 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 Kay Chang'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 Kay Chang 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.
# Kay Wen Chang, MD · NPI 1649318577
Pediatric Otolaryngology physician in Palo Alto, California. Individual provider, active in the CMS NPPES registry since February 2, 2007.
## Identity
- **NPI:** 1649318577 (Entity type: Individual)
- **Enumerated:** February 2, 2007
- **Primary specialty:** Otolaryngology - Pediatric Otolaryngology · taxonomy 207YP0228X
- **State license:** G85741 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 725 WELCH RD, Palo Alto, CA 94304-1601
- **Phone:** (650) 497-8000
## 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:** Warren Alpert Medical School Of Brown University, class of 1992
## Record status
- **NPPES last updated:** April 28, 2024
- **Other identifiers:** Other 00G857410 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1649318577) · Data from the CMS NPPES public registry.