CONSTANCE WU MD
NPI 1447837661
Internal Medicine in San Francisco, CA
About Constance Wu Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
CONSTANCE WU MD (NPI 1447837661) is an individual internal medicine provider in San Francisco, California, licensed in California (A191824) and active in the NPI registry since March 2021. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Constance Wu Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
3Medicare enrollment records show Constance Wu reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Francisco, CA 94143
- Reassigned Medicare billing, California enrollment
- 2,112 clinicians in this Medicare group
San Francisco, CA 94143
- Reassigned Medicare billing, California enrollment
- 5,645 clinicians in this Medicare group
San Francisco, CA 94122
- Reassigned Medicare billing, California enrollment
- 5,544 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 94143 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.
SAN FRANCISCO, CA 94143
SAN FRANCISCO, CA 94143
SAN FRANCISCO, CA 94143
SAN FRANCISCO, CA 94143
SAN FRANCISCO, CA 94143
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 Constance Wu's NPI number?
The NPI number for Constance Wu is 1447837661. It was assigned to this individual provider in the NPPES registry on March 24, 2021.
Where is Constance Wu located?
Constance Wu practices at 505 Parnassus Ave, San Francisco, CA 94143. The listed phone number is (415) 476-1000.
What is Constance Wu's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Constance Wu enrolled in Medicare?
Yes. Constance Wu is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Constance Wu's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Constance Wu reassigns Medicare benefits to 3 organizations: Regents Of The University Of California (San Francisco, CA), University Of California San Francisco (San Francisco, CA) and Ucsf Medical Group Business Services (San Francisco, 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 Constance Wu'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 Constance Wu was last updated on June 10, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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.
# Constance Wu, MD · NPI 1447837661
Internal Medicine physician in San Francisco, California. Individual provider, active in the CMS NPPES registry since March 24, 2021.
## Identity
- **NPI:** 1447837661 (Entity type: Individual)
- **Enumerated:** March 24, 2021
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** A191824 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 505 PARNASSUS AVE, San Francisco, CA 94143-2204
- **Phone:** (415) 476-1000
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Regents Of The University Of California (NPI 1376613943, San Francisco, CA); University Of California San Francisco (NPI 1346329380, San Francisco, CA); Ucsf Medical Group Business Services (NPI 1477624104, San Francisco, CA) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** June 10, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1447837661) · Data from the CMS NPPES public registry.