Oleg Nisenberg, MD, PHD
NPI 1255541058 · Internal Medicine Physician · Loma Linda, CA
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Oleg Nisenberg, MD, PHD is a Internal Medicine Physician provider in Loma Linda, CA (NPI 1255541058).
Provider details
- NPI number
- 1255541058
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, PHD
- Sex
- Male
- Sole proprietor
- No
- License
- A99081 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 21 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Furosemide | 58 | 30 |
| Atorvastatin Calcium | 53 | 28 |
| Cefpodoxime Proxetil | 52 | 50 |
| Amlodipine Besylate | 28 | 17 |
| Prednisone | 28 | 25 |
| Clopidogrel Bisulfatebrand: Clopidogrel | 27 | 14 |
| Hydrocodone/Acetaminophen |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-05-23
- Last updated
- 2021-12-06
Frequently asked questions
- What is Oleg Nisenberg's NPI number?
- Oleg Nisenberg's National Provider Identifier (NPI) is 1255541058, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Oleg Nisenberg's specialty?
- Oleg Nisenberg is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Oleg Nisenberg located?
- Oleg Nisenberg's practice location on file with NPPES is 11234 Anderson St, Loma Linda, CA 92354-2804.
- What is Oleg Nisenberg's phone number?
- The practice phone number listed in the NPPES registry for Oleg Nisenberg is (909) 558-4000.
- Does Oleg Nisenberg accept Medicare?
- Oleg Nisenberg is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Oleg Nisenberg's NPI active?
- Yes — Oleg Nisenberg's NPI (1255541058) is active in the NPPES registry as of the last update on 2021-12-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.