STACY SANG-AH HAN
NPI 1225665938
Internal Medicine in San Francisco, CA
About Stacy Sang-ah Han NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
STACY SANG-AH HAN (NPI 1225665938) is an individual internal medicine provider in San Francisco, California, licensed in California (185378) and active in the NPI registry since March 2020. She is enrolled in Medicare PECOS and is a graduate of University Of California, San Francisco School Of Medicine (2020).
NPPES Registry Identity
Specialties & Licenses 2
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
Stacy Sang-ah Han 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
4Medicare enrollment records show Stacy Han reassigns Medicare billing to 4 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
San Francisco, CA 94109
- Reassigned Medicare billing, California enrollment
- 213 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.
Areas of Expertise CMS Part B claims 4
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94110 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 94110
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 Stacy Han's NPI number?
The NPI number for Stacy Han is 1225665938. It was assigned to this individual provider in the NPPES registry on March 24, 2020.
Where is Stacy Han located?
Stacy Han practices at 3555 Cesar Chavez, San Francisco, CA 94110. The listed phone number is (415) 600-6000.
What is Stacy Han's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Stacy Han enrolled in Medicare?
Yes. Stacy Han 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 Stacy Han's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Stacy Han reassigns Medicare benefits to 4 organizations: Regents Of The University Of California (San Francisco, CA), University Of California San Francisco (San Francisco, CA), Ucsf Medical Group Business Services (San Francisco, CA) and Pacific Inpatient Medical Group (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 Stacy Han'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 Stacy Han was last updated on July 16, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# Stacy Sang-Ah Han · NPI 1225665938
Internal Medicine physician in San Francisco, California. Individual provider, active in the CMS NPPES registry since March 24, 2020.
## Identity
- **NPI:** 1225665938 (Entity type: Individual)
- **Enumerated:** March 24, 2020
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 185378 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 3555 CESAR CHAVEZ, San Francisco, CA 94110-4403
- **Phone:** (415) 600-6000
## 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:** 4 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); Pacific Inpatient Medical Group (NPI 1447447248, San Francisco, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of California, San Francisco School Of Medicine, class of 2020
## Record status
- **NPPES last updated:** July 16, 2026
---
Source: [NPI Profile](https://npiprofile.com/npi/1225665938) · Data from the CMS NPPES public registry.