WOLDEMARIAM GEBRESELASSIE MD
NPI 1811056427
Internal Medicine - Nephrology in Fontana, CA
About Woldemariam Gebreselassie Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WOLDEMARIAM GEBRESELASSIE MD (NPI 1811056427) is an individual nephrology provider in Fontana, California, licensed in California (A43179) and active in the NPI registry since December 2006. He 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)
Woldemariam Gebreselassie Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Woldemariam Gebreselassie reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Norwalk, CA 90650
- Reassigned Medicare billing, California enrollment
- 755 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 92335 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.
FONTANA, CA 92335
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 Woldemariam Gebreselassie's NPI number?
The NPI number for Woldemariam Gebreselassie is 1811056427. It was assigned to this individual provider in the NPPES registry on December 8, 2006.
Where is Woldemariam Gebreselassie located?
Woldemariam Gebreselassie practices at 9961 Sierra Ave, Fontana, CA 92335. The listed phone number is (909) 427-3910.
What is Woldemariam Gebreselassie's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.
Is Woldemariam Gebreselassie enrolled in Medicare?
Yes. Woldemariam Gebreselassie is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Woldemariam Gebreselassie's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Woldemariam Gebreselassie reassigns Medicare benefits to Department Of State Hospitals (Norwalk, CA). The 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 Woldemariam Gebreselassie'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 Woldemariam Gebreselassie was last updated on September 23, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.
# Woldemariam Gebreselassie, MD · NPI 1811056427
Nephrology physician in Fontana, California. Individual provider, active in the CMS NPPES registry since December 8, 2006.
## Identity
- **NPI:** 1811056427 (Entity type: Individual)
- **Enumerated:** December 8, 2006
- **Primary specialty:** Internal Medicine - Nephrology · taxonomy 207RN0300X
- **State license:** A43179 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 9961 SIERRA AVE, Fontana, CA 92335-6720
- **Phone:** (909) 427-3910
## 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:** Department Of State Hospitals (NPI 1265406565, Norwalk, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** September 23, 2008
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Source: [NPI Profile](https://npiprofile.com/npi/1811056427) · Data from the CMS NPPES public registry.