DIANE C SLIWKA M.D.
NPI 1275559544
Hospitalist in San Francisco, CA
About Diane C Sliwka M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DIANE C SLIWKA M.D. (NPI 1275559544) is an individual hospitalist provider in San Francisco, California, licensed in California (A100674) and active in the NPI registry since July 2006. She is enrolled in Medicare PECOS.
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 (PECOS)
Diane C Sliwka M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
3Medicare enrollment records show Diane Sliwka 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
- 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 94143
- Reassigned Medicare billing, California enrollment
- 2,112 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
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 94117 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 94117
SAN FRANCISCO, CA 94117
SAN FRANCISCO, CA 94117
SAN FRANCISCO, CA 94117
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 Diane Sliwka's NPI number?
The NPI number for Diane Sliwka is 1275559544. It was assigned to this individual provider in the NPPES registry on July 13, 2006.
Where is Diane Sliwka located?
Diane Sliwka practices at 350 Parnassus Ave Suite 150, San Francisco, CA 94117. The listed phone number is (415) 353-7363.
What is Diane Sliwka's specialty?
The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.
Is Diane Sliwka enrolled in Medicare?
Yes. Diane Sliwka is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Diane Sliwka's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Diane Sliwka reassigns Medicare benefits to 3 organizations: University Of California San Francisco (San Francisco, CA), Ucsf Medical Group Business Services (San Francisco, CA) and Regents Of The University Of California (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 Diane Sliwka'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 Diane Sliwka was last updated on February 24, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Diane C Sliwka, M.D. · NPI 1275559544
Hospitalist physician in San Francisco, California. Individual provider, active in the CMS NPPES registry since July 13, 2006.
## Identity
- **NPI:** 1275559544 (Entity type: Individual)
- **Enumerated:** July 13, 2006
- **Primary specialty:** Hospitalist · taxonomy 208M00000X
- **State license:** A100674 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 350 PARNASSUS AVE, SUITE 150, San Francisco, CA 94117
- **Phone:** (415) 353-7363 · **Fax:** (415) 502-1963
## 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): University Of California San Francisco (NPI 1346329380, San Francisco, CA); Ucsf Medical Group Business Services (NPI 1477624104, San Francisco, CA); Regents Of The University Of California (NPI 1376613943, San Francisco, CA) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** February 24, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1275559544) · Data from the CMS NPPES public registry.