UNION SQUARE DERMATOLOGY A PROFESSIONAL CORPORATION
NPI 1023263613
Dermatology in San Francisco, CA
About Union Square Dermatology A Professional Corporation NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
UNION SQUARE DERMATOLOGY A PROFESSIONAL CORPORATION (NPI 1023263613) is a healthcare organization registered as a dermatology in San Francisco, California and active in the NPI registry since November 2008. The organization holds a CLIA Certificate of Compliance certificate valid through February 19, 2028 and lists Vail Charles Reese, Physician, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Group Practice 1
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Union Square Dermatology A Professional Corporation is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
7Medicare enrollment records show 7 clinicians reassign Medicare billing to Union Square Dermatology A Professional Corporation, which bills Medicare for the services they deliver. Of these, 2 practice at this address and 6 within 10 miles. They are listed nearest first.
Clinicians, nearest first (7)
Mill Valley, CA 94941
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
CLIA Laboratory Certificates CMS CLIA
Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.
Certificate of Compliance 05D1059083
Union Square Dermatology A Professional Corp · San Francisco, CAFrequently 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 Union Square Dermatology A Professional Corporation's NPI number?
The NPI number for Union Square Dermatology A Professional Corporation is 1023263613. It was assigned to this organization in the NPPES registry on November 24, 2008.
Where is Union Square Dermatology A Professional Corporation located?
Union Square Dermatology A Professional Corporation is located at 450 Sutter St Suite 830, San Francisco, CA 94108. The listed phone number is (415) 393-0550.
What is Union Square Dermatology A Professional Corporation's specialty?
The primary specialty registered for this NPI is Dermatology with taxonomy code 207N00000X.
Is Union Square Dermatology A Professional Corporation enrolled in Medicare?
Yes. Union Square Dermatology A Professional Corporation is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Union Square Dermatology A Professional Corporation?
According to the CMS Revalidation Reassignment List (October 2026 release), 7 clinicians in 2 Medicare specialties reassign their Medicare billing to Union Square Dermatology A Professional Corporation. A 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 the clinician's services. The largest specialties are Dermatology (6) and Nurse Practitioner (1). Of these, 2 practice at this address and 6 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Does Union Square Dermatology A Professional Corporation hold a CLIA laboratory certificate?
Yes. A Certificate of Compliance (number 05D1059083) is associated with this NPI, valid through February 19, 2028. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.
When was this NPI record last updated?
The NPPES record for Union Square Dermatology A Professional Corporation was last updated on November 24, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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.
# Union Square Dermatology A Professional Corporation · NPI 1023263613
Dermatology organization in San Francisco, California. Organization record, active in the CMS NPPES registry since November 24, 2008.
## Identity
- **NPI:** 1023263613 (Entity type: Organization)
- **Enumerated:** November 24, 2008
- **Primary specialty:** Dermatology · taxonomy 207N00000X
- **Organization subpart:** No
- **Authorized official:** Vail Reese, PHYSICIAN
## Practice location
- **Address:** 450 SUTTER ST, SUITE 830, San Francisco, CA 94108-3915
- **Phone:** (415) 393-0550 · **Fax:** (415) 393-9956
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 7 clinicians in 2 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Dermatology (6), Nurse Practitioner (1); 2 practice at this address and 6 within 10 miles · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** November 24, 2008
- **CLIA laboratory certificates:** 1 on file
---
Source: [NPI Profile](https://npiprofile.com/npi/1023263613) · Data from the CMS NPPES public registry.