DR. ARIELLE LOUISA KLEPPER
NPI 1912351180
Hospitalist in San Francisco, CA
About Dr. Arielle Louisa Klepper NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ARIELLE LOUISA KLEPPER (NPI 1912351180) is an individual hospitalist provider in San Francisco, California, licensed in California (A152544) and active in the NPI registry since April 2016. She is enrolled in Medicare PECOS and is a graduate of Other (2016).
NPPES Registry Identity
Specialties & Licenses 3
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
Dr. Arielle Louisa Klepper 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
3Medicare enrollment records show Arielle Klepper 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.
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 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 Arielle Klepper's NPI number?
The NPI number for Arielle Klepper is 1912351180. It was assigned to this individual provider in the NPPES registry on April 14, 2016.
Where is Arielle Klepper located?
Arielle Klepper practices at 505 Parnassus Ave Room 987, San Francisco, CA 94143. The listed phone number is (415) 476-1528.
What is Arielle Klepper's specialty?
The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.
Is Arielle Klepper enrolled in Medicare?
Yes. Arielle Klepper 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 Arielle Klepper's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Arielle Klepper 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 Arielle Klepper'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 Arielle Klepper was last updated on December 26, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 21 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.
# Dr. Arielle Louisa Klepper · NPI 1912351180
Hospitalist physician in San Francisco, California. Individual provider, active in the CMS NPPES registry since April 14, 2016.
## Identity
- **NPI:** 1912351180 (Entity type: Individual)
- **Enumerated:** April 14, 2016
- **Primary specialty:** Hospitalist · taxonomy 208M00000X
- **State license:** A152544 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 505 PARNASSUS AVE, ROOM 987, San Francisco, CA 94143-2204
- **Phone:** (415) 476-1528
## 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:** 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
- **Medical school:** Other, class of 2016
## Record status
- **NPPES last updated:** December 26, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1912351180) · Data from the CMS NPPES public registry.