Alex Rosenberg, MD
NPI 1275074536 · Hospitalist Physician · Los Angeles, CA
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alex Rosenberg, MD is a Hospitalist Physician provider in Los Angeles, CA (NPI 1275074536).
Provider details
- NPI number
- 1275074536
- Entity type
- Individual
- Primary specialty
- Hospitalist PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A157841 (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
9 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
- 2017-03-19
- Last updated
- 2022-03-29
- Certified
- 2022-03-29
Frequently asked questions
- What is Alex Rosenberg's NPI number?
- Alex Rosenberg's National Provider Identifier (NPI) is 1275074536, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alex Rosenberg's specialty?
- Alex Rosenberg is listed in the NPPES registry with a primary specialty of Hospitalist Physician (Allopathic & Osteopathic Physicians).
- Where is Alex Rosenberg located?
- Alex Rosenberg's practice location on file with NPPES is 2051 Marengo St # C2k100, Los Angeles, CA 90033-1352.
- What is Alex Rosenberg's phone number?
- The practice phone number listed in the NPPES registry for Alex Rosenberg is (323) 409-5505.
- Does Alex Rosenberg accept Medicare?
- Alex Rosenberg is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alex Rosenberg's NPI active?
- Yes — Alex Rosenberg's NPI (1275074536) is active in the NPPES registry as of the last update on 2022-03-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.