CarcinomaRadioisotopesRadionuclide Imaging
Dr. Nelson Barritt Arnstein, MD
NPI1629145529PAC ID9830220680
- Medicare services, 2018
- 12
- Medicare patients, 2024
- 18
- Publications
- 8
- Hospital affiliations
- 1
- Industry payments
- $176
- Practice address
- 9333 Imperial Highway, Downey, CA 90242
- Practice phone
- Call (562) 461-6007
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Arnstein's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Nelson Barritt Arnstein is a nuclear medicine physician in Downey, California
Dr. Arnstein practices at Downey Medical Center in Downey, California, part of Kaiser Permanente.
Dr. Arnstein's NPI, 1629145529, was assigned on November 29, 2006. Dr. Arnstein graduated from Icahn School Of Medicine At Mount Sinai in 1979. Dr. Arnstein holds California license G54909.
NPI and contact details
- NPI
- 1629145529NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9830220680
- NPI enumeration date
- November 29, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (562) 461-6007
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 73
- Medical school graduation
- 1979
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Nelson Barritt Arnstein practices at Downey Medical Center in Downey, California
Dr. Arnstein's primary practice is Downey Medical Center, at 9333 Imperial Highway, Downey, CA 90242 in Los Angeles County. The practice phone is (562) 461-6007.
- Downey Medical Center9333 Imperial Highway, Downey, CA 90242 · Los Angeles CountyPhone(562) 461-6007
Source: Dmand AI Affiliation Data
Dr. Nelson Barritt Arnstein is affiliated with 3 sites of care and 1 medical group
Dr. Arnstein's primary practice is Downey Medical Center in Downey, California, part of Kaiser Permanente. The medical group on file is Southern California Permanente Medical Group. Dmand AI also links Dr. Arnstein to 1 more breast imaging center and 1 group practice or clinic, each named with a free account.
Southern California Permanente Medical Group1 breast imaging centerName with a free account1 group practice or clinicName with a free account
See all 4 affiliations for Dr. ArnsteinSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Nelson Barritt Arnstein's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Arnstein practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Downey Medical Center | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Nelson Barritt Arnstein is one of 131 nuclear medicine physicians in California
Nuclear medicine is Dr. Arnstein's primary specialty in the NPI Registry, under taxonomy code 207U00000X. Dr. Arnstein is board certified in nuclear medicine by the American Board of Nuclear Medicine. Dr. Arnstein is licensed in California.
Specialties and state licenses
- Nuclear medicine, CaliforniaPrimary
Nuclear medicine physicians near Dr. Arnstein
Counts of nuclear medicine physicians with a Dmand AI profile, by place and practice. Each opens the list.
131nuclear medicine physicians in California
2nuclear medicine physicians in Downey
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Nelson Barritt Arnstein billed Medicare for 12 services in 2018
CMS data shows 12 Medicare services from Dr. Arnstein across 1 procedure code in 2018, for 18 Medicare patients. Medicare paid $705 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 201812
Medicare patients18
Paid by Medicare$705
Procedure codes1
Dr. Arnstein's Medicare services by type, 2017 to 2018
- 2017
- 2018
- Imaging
- 2017: 142018: 1214%
Dr. Arnstein compared with the California median for nuclear medicine physicians, 2018
- Dr. Arnstein
- California median
- Medicare services
- 12vs 61798% below
- Medicare patients
- 18vs 43896% below
Medians across 97 nuclear medicine physicians in California with Dmand AI profiles that report each measure.
Dr. Arnstein's most billed Medicare procedure codes, 2018
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Arnstein?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Arnstein and other nuclear medicine physicians in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Nelson Barritt Arnstein treated 18 Medicare patients in 2024, average age 68
CMS counts 18 Medicare patients who saw Dr. Arnstein in 2024. 75% of them have high blood pressure, and 72% have high cholesterol. Their average risk score is 3.40, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Arnstein's median patient age at 64, with 63% women.
Medicare patients, 202418
Average age68
Average risk score3.40
Chronic conditions among Dr. Arnstein's Medicare patients, 2024
- High blood pressure75%
- High cholesterol72%
- Chronic kidney disease61%
Share of Medicare patients with each condition. A patient can have several.
Dr. Arnstein's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 64
Patient panel by sex, all payers
- Women63%
- Men38%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How Dr. Nelson Barritt Arnstein takes part in Medicare
Dr. Arnstein accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Nelson Barritt Arnstein has 8 publications on record
Dmand AI links 8 papers to Dr. Arnstein. The most frequent topics are Radionuclide Imaging, Breast Neoplasms and Thyroid Neoplasms. Dr. Arnstein has published most often in J Nucl Med. Dr. Arnstein's most frequent co-authors are Jack Edward Juni, MD, Michael E. Siegel, MD and Richard L. Wahl, MD.
Papers8
Topics Dr. Arnstein writes about most
- Radionuclide Imaging
- Breast Neoplasms
- Thyroid Neoplasms
Dr. Arnstein's most frequent co-authors
- Jack Edward Juni, MD1 shared paper
- Michael E. Siegel, MD1 shared paper
- Richard L. Wahl, MD1 shared paper
Recent publications by Dr. Arnstein
Radiology
Gastric EmptyingObesityOrganotechnetium Compounds
Antineoplastic AgentsBone NeoplasmsBreast Neoplasms
Common Bile Duct DiseasesCystsUltrasonography
See who Dr. Arnstein researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Arnstein works with, so you can find a warm path to the right nuclear medicine physicians.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Nelson Barritt Arnstein received $176 in industry payments from 2017 to 2024
CMS Open Payments shows 3 general payments to Dr. Arnstein from 2 drug and device companies from 2017 to 2024. Food and beverage make up the largest share, 100% of the total. Bayer HealthCare Pharmaceuticals Inc. paid the most, $113.
General payments to Dr. Arnstein by program year, 2017 to 2024
Companies that paid Dr. Arnstein the most, 2017 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Nelson Barritt Arnstein graduated from Icahn School Of Medicine At Mount Sinai
Dr. Arnstein graduated from Icahn School Of Medicine At Mount Sinai in 1979.
- Medical school
- Board certified in nuclear medicine
Source: Dmand AI Professional Profile Data
Dr. Nelson Barritt Arnstein accepts plans from 2 insurance carriers
Dr. Arnstein is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Kaiser Permanente
- CMS Medicare
Plan types Dr. Arnstein accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Nelson Barritt Arnstein's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Nelson Barritt Arnstein
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Nelson Barritt Arnstein's NPI number?
Dr. Nelson Barritt Arnstein's NPI number is 1629145529. It was assigned on November 29, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Nelson Barritt Arnstein?
Dr. Nelson Barritt Arnstein is a nuclear medicine physician in Downey, California. The primary specialty in the NPI Registry is Nuclear Medicine Physician (taxonomy code 207U00000X).
Where does Dr. Nelson Barritt Arnstein practice?
Dr. Arnstein practices at 9333 Imperial Highway, Downey, CA 90242. Dr. Arnstein's primary practice is Downey Medical Center in Downey, California, part of Kaiser Permanente. Dmand AI also links Dr. Arnstein to 1 breast imaging center and 1 group practice or clinic.
What is Dr. Nelson Barritt Arnstein's office phone number?
The practice phone on file for Dr. Arnstein is (562) 461-6007.
What is Dr. Nelson Barritt Arnstein's medical license number?
Dr. Arnstein holds California license G54909.
Which hospitals is Dr. Nelson Barritt Arnstein affiliated with?
Dr. Arnstein practices at Downey Medical Center in Downey, California.
What medical group is Dr. Nelson Barritt Arnstein part of?
Dr. Arnstein is linked to Southern California Permanente Medical Group.
Does Dr. Nelson Barritt Arnstein accept Medicare?
Yes. CMS data shows Dr. Arnstein billed Medicare for 12 services in 2018, and Dr. Arnstein accepts Medicare assignment.
How many Medicare patients does Dr. Nelson Barritt Arnstein see?
CMS counts 18 Medicare patients who saw Dr. Arnstein in 2024, with an average age of 68.
Is Dr. Nelson Barritt Arnstein board certified?
Yes. Dr. Arnstein is board certified in nuclear medicine by the American Board of Nuclear Medicine.
Show 7 more questionsShow fewer questions
What services does Dr. Nelson Barritt Arnstein bill to Medicare?
In 2018, Dr. Arnstein's most billed Medicare services were nuclear medicine (78452).
Where did Dr. Nelson Barritt Arnstein go to medical school?
Dr. Arnstein graduated from Icahn School Of Medicine At Mount Sinai in 1979.
Has Dr. Nelson Barritt Arnstein received payments from drug or device companies?
CMS Open Payments shows $176 in general payments to Dr. Arnstein from 2 companies from 2017 to 2024. The largest total came from Bayer HealthCare Pharmaceuticals Inc.
How long has Dr. Nelson Barritt Arnstein been practicing?
Dr. Arnstein graduated from medical school in 1979, 47 years ago.
Does Dr. Nelson Barritt Arnstein do research?
Dmand AI links 8 publications to Dr. Arnstein.
Who does Dr. Nelson Barritt Arnstein publish with?
Dr. Arnstein's most frequent co-authors are Jack Edward Juni, MD (1 shared paper), Michael E. Siegel, MD (1 shared paper) and Richard L. Wahl, MD (1 shared paper).
What insurance does Dr. Nelson Barritt Arnstein accept?
Dr. Arnstein is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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