Nelson Arnstein, MD
NPI 1629145529 · Nuclear Medicine Physician · Bellflower, CA
Enrolled with Medicare as Practitioner - Nuclear Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nelson Arnstein, MD is a Nuclear Medicine Physician provider in Bellflower, CA (NPI 1629145529).
Provider details
- NPI number
- 1629145529
- Entity type
- Individual
- Primary specialty
- Nuclear Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- G54909 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
19 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$63 across 2 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-29
- Last updated
- 2021-11-22
Frequently asked questions
- What is Nelson Arnstein's NPI number?
- Nelson Arnstein's National Provider Identifier (NPI) is 1629145529, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nelson Arnstein's specialty?
- Nelson Arnstein is listed in the NPPES registry with a primary specialty of Nuclear Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Nelson Arnstein located?
- Nelson Arnstein's practice location on file with NPPES is 9400 Rosecrans Ave, Bellflower, CA 90706-2246.
- What is Nelson Arnstein's phone number?
- The practice phone number listed in the NPPES registry for Nelson Arnstein is (562) 461-3000.
- Does Nelson Arnstein accept Medicare?
- Nelson Arnstein is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nelson Arnstein's NPI active?
- Yes — Nelson Arnstein's NPI (1629145529) is active in the NPPES registry as of the last update on 2021-11-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.