Dr. Dean Masaru Hashimoto, MD
- Publications
- 46
- Hospital affiliations
- 1
- Medical group
- 1
- State license
- 1
- Year NPI issued
- 2005
- Practice address
- 200 Groton Rd, Ayer, MA 01432
- Practice phone
- Call (978) 784-9000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Nashoba Valley Medical Center
Ayer, Massachusetts
Find Dr. Hashimoto's professional email, personal email and mobile number
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Dr. Dean Masaru Hashimoto is an occupational medicine physician in Ayer, Massachusetts
Dr. Hashimoto practices at Nashoba Valley Medical Center in Ayer, Massachusetts.
Dr. Hashimoto's NPI, 1306837802, was assigned on November 2, 2005. Dr. Hashimoto holds Massachusetts license 58822.
- NPI
- 1306837802NPI Registry (opens in a new tab)
- NPI enumeration date
- November 2, 2005
- NPI status
- Active
- Practice phone
- (978) 784-9000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Dean Masaru Hashimoto practices at Nashoba Valley Medical Center in Ayer, Massachusetts
Dr. Hashimoto's primary practice is Nashoba Valley Medical Center, at 200 Groton Rd, Ayer, MA 01432 in Middlesex County. The practice phone is (978) 784-9000.
- Nashoba Valley Medical Center200 Groton Rd, Ayer, MA 01432 · Middlesex CountyPhone(978) 784-9000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Dean Masaru Hashimoto is affiliated with 2 sites of care and 1 medical group
Dr. Hashimoto's primary practice is Nashoba Valley Medical Center in Ayer, Massachusetts. Dr. Hashimoto is also affiliated with Massachusetts General Hospital. The medical group on file is Brigham and Women's Hospital.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Dean Masaru Hashimoto's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Hashimoto practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Nashoba Valley Medical Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Dean Masaru Hashimoto is one of 19 occupational medicine physicians in Massachusetts
Occupational medicine is Dr. Hashimoto's primary specialty in the NPI Registry, under taxonomy code 2083X0100X. Dr. Hashimoto is licensed in Massachusetts.
Specialties and state licenses
- Occupational medicine, MassachusettsPrimary
Occupational medicine physicians near Dr. Hashimoto
Counts of occupational 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. Dean Masaru Hashimoto has 46 publications on record
Dmand AI links 46 papers to Dr. Hashimoto, published from 2011 to 2025. 2021 was the busiest year, with 5. The most frequent topics are Occupational Health, Boston and Health Personnel. Dr. Hashimoto has published most often in J Occup Environ Med. Dr. Hashimoto's most frequent co-authors are Erica Seiguer Shenoy, MD, PhD, Lacey Breena Robinson, MD and Aleena Banerji, MD.
Dr. Hashimoto's papers by year, 2014 to 2025
Topics Dr. Hashimoto writes about most
- Occupational Health
- Boston
- Health Personnel
- Occupational Diseases
- COVID-19
- Hospitals
- SARS-CoV-2
- Workplace
Dr. Hashimoto's most frequent co-authors
- Erica Seiguer Shenoy, MD, PhD9 shared papers
- Lacey Breena Robinson, MD4 shared papers
- Aleena Banerji, MD3 shared papers
Recent publications by Dr. Hashimoto
See who Dr. Hashimoto researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Hashimoto works with, so you can find a warm path to the right occupational medicine physicians.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Sources for Dr. Dean Masaru Hashimoto'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 |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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. Dean Masaru Hashimoto
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What is Dr. Dean Masaru Hashimoto's NPI number?
Dr. Dean Masaru Hashimoto's NPI number is 1306837802. It was assigned on November 2, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Dean Masaru Hashimoto?
Dr. Dean Masaru Hashimoto is an occupational medicine physician in Ayer, Massachusetts. The primary specialty in the NPI Registry is Occupational Medicine Physician (taxonomy code 2083X0100X).
Where does Dr. Dean Masaru Hashimoto practice?
Dr. Hashimoto practices at 200 Groton Rd, Ayer, MA 01432. Dr. Hashimoto's primary practice is Nashoba Valley Medical Center in Ayer, Massachusetts.
What is Dr. Dean Masaru Hashimoto's office phone number?
The practice phone on file for Dr. Hashimoto is (978) 784-9000.
What is Dr. Dean Masaru Hashimoto's medical license number?
Dr. Hashimoto holds Massachusetts license 58822.
Which hospitals is Dr. Dean Masaru Hashimoto affiliated with?
Dr. Hashimoto is affiliated with Massachusetts General Hospital.
What medical group is Dr. Dean Masaru Hashimoto part of?
Dr. Hashimoto is linked to Brigham and Women's Hospital.
How long has Dr. Dean Masaru Hashimoto been practicing?
Dr. Hashimoto's NPI was assigned in 2005.
Does Dr. Dean Masaru Hashimoto do research?
Dmand AI links 46 publications to Dr. Hashimoto, published from 2011 to 2025.
Who does Dr. Dean Masaru Hashimoto publish with?
Dr. Hashimoto's most frequent co-authors are Erica Seiguer Shenoy, MD, PhD (9 shared papers), Lacey Breena Robinson, MD (4 shared papers) and Aleena Banerji, MD (3 shared papers).
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