DR. STEPHANIE P CHEN MD
NPI 1629572136
Ophthalmology - Cornea and External Diseases Specialist in Los Altos, CA
About Dr. Stephanie P Chen Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. STEPHANIE P CHEN MD (NPI 1629572136) is an individual cornea and external diseases specialist in Los Altos, California, licensed in California (A165180) and active in the NPI registry since March 2018. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses 2
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)
Dr. Stephanie P Chen Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Stephanie Chen reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Los Altos, CA 94024
- Reassigned Medicare billing, California enrollment
Los Altos, CA 94024
- Reassigned Medicare billing, California enrollment
- Medicare enrollment name: David F Chang M D Inc
- 3 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 94024 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 8
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
LOS ALTOS, CA 94024
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 Stephanie Chen's NPI number?
The NPI number for Stephanie Chen is 1629572136. It was assigned to this individual provider in the NPPES registry on March 20, 2018.
Where is Stephanie Chen located?
Stephanie Chen practices at 762 Altos Oaks Dr, Los Altos, CA 94024. The listed phone number is (650) 948-9123.
What is Stephanie Chen's specialty?
The primary specialty registered for this NPI is Ophthalmology, specializing in Cornea and External Diseases Specialist, with taxonomy code 207WX0120X.
Is Stephanie Chen enrolled in Medicare?
Yes. Stephanie Chen is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Stephanie Chen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Stephanie Chen reassigns Medicare benefits to 2 organizations: Stephanie P Chen, MD Inc (Los Altos, CA) and David F. Chang MD Inc (Los Altos, 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 Stephanie Chen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Stephanie Chen accept?
Health plans from Molina Healthcare list Stephanie Chen 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 Stephanie Chen was last updated on July 21, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# Dr. Stephanie P Chen, MD · NPI 1629572136
Cornea and External Diseases Specialist physician in Los Altos, California. Individual provider, active in the CMS NPPES registry since March 20, 2018.
## Identity
- **NPI:** 1629572136 (Entity type: Individual)
- **Enumerated:** March 20, 2018
- **Primary specialty:** Ophthalmology - Cornea and External Diseases Specialist · taxonomy 207WX0120X
- **State license:** A165180 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 762 ALTOS OAKS DR, Los Altos, CA 94024-5434
- **Phone:** (650) 948-9123
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Stephanie P Chen, MD Inc (NPI 1740155464, Los Altos, CA); David F. Chang MD Inc (NPI 1275857088, Los Altos, CA) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** July 21, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1629572136) · Data from the CMS NPPES public registry.