Cost-Benefit AnalysisDecision TreesEndovascular Procedures
Dr. Claus Z. Simonsen, MD, PhD
NPI1649400276
- Publications
- 151
- Clinical trials
- 1
- Industry payments
- $318
- State license
- 1
- Year NPI issued
- 2009
- Practice address
- Massachusetts General Hospital, Boston, MA 02114
- Practice phone
- Call (617) 726-2066
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Simonsen'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. Claus Z. Simonsen is a neurologist in Boston, Massachusetts
Dr. Simonsen practices in Boston, Massachusetts.
Dr. Simonsen's NPI, 1649400276, was assigned on July 16, 2009. Dr. Simonsen holds Massachusetts license L-240559.
NPI and contact details
- NPI
- 1649400276NPI Registry (opens in a new tab)
- NPI enumeration date
- July 16, 2009
- NPI status
- Active
- Practice phone
- (617) 726-2066
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
Sources: NPPES NPI Registry (CMS); and Dmand AI Professional Profile Data
Dr. Claus Z. Simonsen's practice address is in Boston, Massachusetts
Dr. Simonsen's practice address in the NPI Registry is Massachusetts General Hospital, Boston, MA 02114. The practice phone is (617) 726-2066.
- NPI Registry addressMassachusetts General Hospital, Boston, MA 02114Phone(617) 726-2066
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dmand AI tracks the EHR system at Dr. Claus Z. Simonsen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Simonsen practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dr. Simonsen's practice | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Claus Z. Simonsen is one of 806 neurologists in Massachusetts
Neurology is Dr. Simonsen's primary specialty in the NPI Registry, under taxonomy code 2084N0400X. Dr. Simonsen is licensed in Massachusetts.
Specialties and state licenses
- Neurology, MassachusettsPrimary
Neurologists near Dr. Simonsen
Counts of neurologists 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. Claus Z. Simonsen has 151 publications on record
Dmand AI links 151 papers to Dr. Simonsen, published from 2013 to 2025. 2021 was the busiest year, with 18. The most frequent topics are Stroke, Brain Ischemia and Ischemic Stroke. Dr. Simonsen has published most often in Stroke. Dr. Simonsen's most frequent co-authors are Ronil V. Chandra, MBBS, Albert J. Yoo, MD and Michael Hill, MD.
Papers151
Years published2013 to 2025
Dr. Simonsen's papers by year, 2016 to 2025
Topics Dr. Simonsen writes about most
- Stroke
- Brain Ischemia
- Ischemic Stroke
- Endovascular Procedures
- Thrombolytic Therapy
- Magnetic Resonance Imaging
- Tissue Plasminogen Activator
- Fibrinolytic Agents
Dr. Simonsen's most frequent co-authors
- Ronil V. Chandra, MBBS9 shared papers
- Albert J. Yoo, MD7 shared papers
- Michael Hill, MD5 shared papers
Recent publications by Dr. Simonsen
Blood-Brain BarrierDiffusion Magnetic Resonance ImagingIschemic Stroke
Endovascular ProceduresIschemic StrokeThrombectomy
Stroke Vasc Neurol
Cerebral Intraventricular HemorrhageFibrinolytic AgentsSubarachnoid Hemorrhage
See who Dr. Simonsen researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Simonsen works with, so you can find a warm path to the right neurologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Claus Z. Simonsen has worked on 1 clinical trial
Dmand AI links Dr. Simonsen to 1 clinical trial. Conditions studied include Stroke and Cerebrovascular Disorders.
Conditions in Dr. Simonsen's trials
- Stroke
- Cerebrovascular Disorders
Investigators on the most trials with Dr. Simonsen
Recent clinical trials with Dr. Simonsen
StrokeCerebrovascular DisordersThrombectomy
Sources: Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)
Dr. Claus Z. Simonsen received $318 in industry payments in 2017
CMS Open Payments shows 2 general payments to Dr. Simonsen from 1 drug or device company in 2017. Food and beverage make up the largest share, 100% of the total. Penumbra, Inc. paid the most, $318.
Companies that paid Dr. Simonsen the most, 2017 to 2017
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Claus Z. Simonsen'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Clinical trials and co-investigators | Dmand AI Research LinkageClinicalTrials.gov (National Library of Medicine) (opens in a new tab) |
| 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. Claus Z. Simonsen
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. Claus Z. Simonsen's NPI number?
Dr. Claus Z. Simonsen's NPI number is 1649400276. It was assigned on July 16, 2009, and it is active in the NPI Registry.
What kind of doctor is Dr. Claus Z. Simonsen?
Dr. Claus Z. Simonsen is a neurologist in Boston, Massachusetts. The primary specialty in the NPI Registry is Neurology Physician (taxonomy code 2084N0400X).
Where does Dr. Claus Z. Simonsen practice?
Dr. Simonsen practices at Massachusetts General Hospital, Boston, MA 02114.
What is Dr. Claus Z. Simonsen's office phone number?
The practice phone on file for Dr. Simonsen is (617) 726-2066.
What is Dr. Claus Z. Simonsen's medical license number?
Dr. Simonsen holds Massachusetts license L-240559.
Has Dr. Claus Z. Simonsen received payments from drug or device companies?
CMS Open Payments shows $318 in general payments to Dr. Simonsen from 1 company from 2017 to 2017. The largest total came from Penumbra, Inc.
How long has Dr. Claus Z. Simonsen been practicing?
Dr. Simonsen's NPI was assigned in 2009.
Does Dr. Claus Z. Simonsen do research?
Dmand AI links 151 publications to Dr. Simonsen, published from 2013 to 2025. Dr. Simonsen has worked on 1 clinical trial.
Who does Dr. Claus Z. Simonsen publish with?
Dr. Simonsen's most frequent co-authors are Ronil V. Chandra, MBBS (9 shared papers), Albert J. Yoo, MD (7 shared papers) and Michael Hill, MD (5 shared papers).
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