J Am Med Dir Assoc
Managed Care ProgramsPrimary Health CarePsychiatry
Dr. Dan Osterweil, MD, FACP, CMD
NPI1588651905
- Part D claims, 2016
- 49
- Publications
- 8
- Industry payments
- $90
- State license
- 1
- Year NPI issued
- 2005
- Practice address
- CA
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
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Dr. Dan Osterweil is a geriatric medicine (internal medicine) physician in California
Dr. Osterweil practices in California.
Dr. Osterweil's NPI, 1588651905, was assigned on September 30, 2005. Dr. Osterweil holds California license A41240.
NPI and contact details
- NPI
- 1588651905NPI Registry (opens in a new tab)
- NPI enumeration date
- September 30, 2005
- NPI status
- Active
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
Sources: NPPES NPI Registry (CMS); and Dmand AI Professional Profile Data
Dmand AI tracks the EHR system at Dr. Dan Osterweil's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Osterweil practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dr. Osterweil's practice | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Dan Osterweil is one of 497 geriatric medicine (internal medicine) physicians in California
Geriatric medicine is Dr. Osterweil's primary specialty in the NPI Registry, under taxonomy code 207RG0300X. Dr. Osterweil is licensed in California.
Specialties and state licenses
- Geriatric medicine (internal medicine), CaliforniaPrimary
Geriatric medicine (internal medicine) physicians near Dr. Osterweil
Counts of geriatric medicine (internal medicine) physicians with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Dan Osterweil wrote 49 Medicare Part D claims in 2016
In 2016, Dr. Osterweil wrote 49 Medicare Part D claims. They cover 3 drugs, with $13,208 in total drug cost.
Part D claims, 201649
Drugs named by CMS3
Total drug cost$13,208
Dr. Osterweil's most prescribed drugs by claims, 2016
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Dan Osterweil has 8 publications on record
Dmand AI links 8 papers to Dr. Osterweil, published from 2014 to 2022. 2016 was the busiest year, with 3. Dr. Osterweil has published most often in J Am Med Dir Assoc. Dr. Osterweil's most frequent co-authors are Romilla A. Batra, MD, Harvey J. Cohen, MD and Samuel C. Durso, MD.
Papers8
Years published2014 to 2022
Dr. Osterweil's papers by year, 2014 to 2022
Dr. Osterweil's most frequent co-authors
- Romilla A. Batra, MD2 shared papers
- Harvey J. Cohen, MD1 shared paper
- Samuel C. Durso, MD1 shared paper
Recent publications by Dr. Osterweil
J Am Med Dir Assoc
HearingPovertySocial Isolation
See who Dr. Osterweil researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Osterweil works with, so you can find a warm path to the right geriatric medicine (internal medicine) physicians.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Dan Osterweil received $90 in industry payments in 2019
CMS Open Payments shows 1 general payment to Dr. Osterweil from 1 drug or device company in 2019. Food and beverage make up the largest share, 100% of the total. ACADIA Pharmaceuticals Inc paid the most, $90.
Companies that paid Dr. Osterweil the most, 2019 to 2019
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Dan Osterweil'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 |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (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) |
| 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. Dan Osterweil
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. Dan Osterweil's NPI number?
Dr. Dan Osterweil's NPI number is 1588651905. It was assigned on September 30, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Dan Osterweil?
Dr. Dan Osterweil is a geriatric medicine (internal medicine) physician in California. The primary specialty in the NPI Registry is Geriatric Medicine (Internal Medicine) Physician (taxonomy code 207RG0300X).
What is Dr. Dan Osterweil's medical license number?
Dr. Osterweil holds California license A41240.
What drugs does Dr. Dan Osterweil prescribe most?
In 2016 Medicare Part D data, Dr. Osterweil's most prescribed drugs by claims were Namenda XR, Celecoxib and Rivastigmine.
Has Dr. Dan Osterweil received payments from drug or device companies?
CMS Open Payments shows $90 in general payments to Dr. Osterweil from 1 company from 2019 to 2019. The largest total came from ACADIA Pharmaceuticals Inc.
How long has Dr. Dan Osterweil been practicing?
Dr. Osterweil's NPI was assigned in 2005.
Does Dr. Dan Osterweil do research?
Dmand AI links 8 publications to Dr. Osterweil, published from 2014 to 2022.
Who does Dr. Dan Osterweil publish with?
Dr. Osterweil's most frequent co-authors are Romilla A. Batra, MD (2 shared papers), Harvey J. Cohen, MD (1 shared paper) and Samuel C. Durso, MD (1 shared paper).
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