Arnold Felsenfeld, M.D.
NPI 1952411159 · Nephrology Physician · Los Angeles, CA
Enrolled with Medicare as Order and Referring Only - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Arnold Felsenfeld, M.D. is a Nephrology Physician provider in Los Angeles, CA (NPI 1952411159).
Provider details
- NPI number
- 1952411159
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G66659 (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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-30
- Last updated
- 2007-07-08
Frequently asked questions
- What is Arnold Felsenfeld's NPI number?
- Arnold Felsenfeld's National Provider Identifier (NPI) is 1952411159, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Arnold Felsenfeld's specialty?
- Arnold Felsenfeld is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Arnold Felsenfeld located?
- Arnold Felsenfeld's practice location on file with NPPES is 11301 Wilshire Blvd, Los Angeles, CA 90073-1003.
- What is Arnold Felsenfeld's phone number?
- The practice phone number listed in the NPPES registry for Arnold Felsenfeld is (310) 268-4381.
- Does Arnold Felsenfeld accept Medicare?
- Arnold Felsenfeld is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Arnold Felsenfeld's NPI active?
- Yes — Arnold Felsenfeld's NPI (1952411159) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.