Robert Leibowitz, MD
NPI 1841253192 · Hematology & Oncology Physician · Los Angeles, CA
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Robert Leibowitz, MD is a Hematology & Oncology Physician provider in Los Angeles, CA (NPI 1841253192).
Provider details
- NPI number
- 1841253192
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- G2R905 (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
20 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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-04-08
- Last updated
- 2015-05-14
Frequently asked questions
- What is Robert Leibowitz's NPI number?
- Robert Leibowitz's National Provider Identifier (NPI) is 1841253192, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Leibowitz's specialty?
- Robert Leibowitz is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Robert Leibowitz located?
- Robert Leibowitz's practice location on file with NPPES is 2080 Century Park E, Los Angeles, CA 90067.
- What is Robert Leibowitz's phone number?
- The practice phone number listed in the NPPES registry for Robert Leibowitz is (310) 229-3555.
- Does Robert Leibowitz accept Medicare?
- Robert Leibowitz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Robert Leibowitz's NPI active?
- Yes — Robert Leibowitz's NPI (1841253192) is active in the NPPES registry as of the last update on 2015-05-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.