DR. OLEG NISENBERG MD, PHD
NPI 1255541058
Internal Medicine in Loma Linda, CA
About Dr. Oleg Nisenberg Md, Phd NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. OLEG NISENBERG MD, PHD (NPI 1255541058) is an individual internal medicine provider in Loma Linda, California, licensed in California (A99081) and active in the NPI registry since May 2007. He is enrolled in Medicare PECOS and is a graduate of Pennsylvania State University College Of Medicine (2005).
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 and accepts Medicare assignment
Dr. Oleg Nisenberg Md, Phd 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 Reassignment
Medicare enrollment records show Oleg Nisenberg reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Anaheim, CA 92807
- Reassigned Medicare billing, California enrollment
- 13,921 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 92354 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.
LOMA LINDA, CA 92354
LOMA LINDA, CA 92354
LOMA LINDA, CA 92354
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 Oleg Nisenberg's NPI number?
The NPI number for Oleg Nisenberg is 1255541058. It was assigned to this individual provider in the NPPES registry on May 23, 2007.
Where is Oleg Nisenberg located?
Oleg Nisenberg practices at 11234 Anderson St Llumc House Staff Office Cp 21005, Loma Linda, CA 92354. The listed phone number is (909) 558-4000.
What is Oleg Nisenberg's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Oleg Nisenberg enrolled in Medicare?
Yes. Oleg Nisenberg 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 organization bills Medicare for Oleg Nisenberg's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Oleg Nisenberg reassigns Medicare benefits to Southern California Permanente Medical Group (Anaheim, 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 Oleg Nisenberg'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 Oleg Nisenberg was last updated on December 6, 2021. 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.
# Dr. Oleg Nisenberg, MD, PHD · NPI 1255541058
Internal Medicine physician in Loma Linda, California. Individual provider, active in the CMS NPPES registry since May 23, 2007.
## Identity
- **NPI:** 1255541058 (Entity type: Individual)
- **Enumerated:** May 23, 2007
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** A99081 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 11234 ANDERSON ST, LLUMC HOUSE STAFF OFFICE CP 21005, Loma Linda, CA 92354-2804
- **Phone:** (909) 558-4000
## 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:** Southern California Permanente Medical Group (NPI 1952333460, Anaheim, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Pennsylvania State University College Of Medicine, class of 2005
## Record status
- **NPPES last updated:** December 6, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1255541058) · Data from the CMS NPPES public registry.