Dr. John Spencer Herendeen, MD
- Part D claims, 2024
- 37
- Publications
- 1
- Industry payments
- $21
- State license
- 1
- Year NPI issued
- 2021
- Practice address
- 750 Washington St, Boston, MA 02111
- Practice phone
- Call (617) 636-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Herendeen'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. John Spencer Herendeen is a neurosurgeon in Boston, Massachusetts
Dr. Herendeen practices in Boston, Massachusetts.
Dr. Herendeen's NPI, 1104406834, was assigned on April 8, 2021. Dr. Herendeen holds Massachusetts license 289703.
- NPI
- 1104406834NPI Registry (opens in a new tab)
- NPI enumeration date
- April 8, 2021
- NPI status
- Active
- Practice phone
- (617) 636-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); and Dmand AI Professional Profile Data
Dr. John Spencer Herendeen's practice address is in Boston, Massachusetts
Dr. Herendeen's practice address in the NPI Registry is 750 Washington St, Boston, MA 02111, in Suffolk County. The practice phone is (617) 636-5000.
- NPI Registry address750 Washington St, Boston, MA 02111 · Suffolk CountyPhone(617) 636-5000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dmand AI tracks the EHR system at Dr. John Spencer Herendeen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Herendeen practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dr. Herendeen's practice | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John Spencer Herendeen is one of 182 neurosurgeons in Massachusetts
Neurological surgery is Dr. Herendeen's primary specialty in the NPI Registry, under taxonomy code 207T00000X. Dr. Herendeen is licensed in Massachusetts.
Specialties and state licenses
- Neurological surgery, MassachusettsPrimary
Neurosurgeons near Dr. Herendeen
Counts of neurosurgeons 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. John Spencer Herendeen wrote 37 Medicare Part D claims in 2024
In 2024, Dr. Herendeen wrote 37 Medicare Part D claims for 19 patients. 84% of them were for generic drugs. CMS names the drug for 13 of them, across 1 drug with 11 or more claims each, at $60 in total drug cost.
Dr. Herendeen's Part D claims by kind of drug, 2024
- Generic31 claims84%
- Brand-name and other6 claims16%
Dr. Herendeen's most prescribed drugs by claims, 2023
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Herendeen's Part D claims, 2024
- Opioids32%12 of 37 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Dr. John Spencer Herendeen has 1 publication on record
Dmand AI links 1 paper to Dr. Herendeen in 2022. Dr. Herendeen's most frequent co-authors are James T. Kryzanski, MD and Joel Michael Oster, MD.
Dr. Herendeen's most frequent co-authors
Recent publications by Dr. Herendeen
See who Dr. Herendeen researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Herendeen works with, so you can find a warm path to the right neurosurgeons.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. John Spencer Herendeen received $21 in industry payments in 2025
CMS Open Payments shows 1 general payment to Dr. Herendeen from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. Stryker Corporation paid the most, $21.
Companies that paid Dr. Herendeen the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. John Spencer Herendeen'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 |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (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. John Spencer Herendeen
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. John Spencer Herendeen's NPI number?
Dr. John Spencer Herendeen's NPI number is 1104406834. It was assigned on April 8, 2021, and it is active in the NPI Registry.
What kind of doctor is Dr. John Spencer Herendeen?
Dr. John Spencer Herendeen is a neurosurgeon in Boston, Massachusetts. The primary specialty in the NPI Registry is Neurological Surgery Physician (taxonomy code 207T00000X).
Where does Dr. John Spencer Herendeen practice?
Dr. Herendeen practices at 750 Washington St, Boston, MA 02111.
What is Dr. John Spencer Herendeen's office phone number?
The practice phone on file for Dr. Herendeen is (617) 636-5000.
What is Dr. John Spencer Herendeen's medical license number?
Dr. Herendeen holds Massachusetts license 289703.
What drugs does Dr. John Spencer Herendeen prescribe most?
In 2023 Medicare Part D data, Dr. Herendeen's most prescribed drugs by claims were Oxycodone HCl.
Has Dr. John Spencer Herendeen received payments from drug or device companies?
CMS Open Payments shows $21 in general payments to Dr. Herendeen from 1 company from 2025 to 2025. The largest total came from Stryker Corporation.
How long has Dr. John Spencer Herendeen been practicing?
Dr. Herendeen's NPI was assigned in 2021.
Does Dr. John Spencer Herendeen do research?
Dmand AI links 1 publication to Dr. Herendeen.
Who does Dr. John Spencer Herendeen publish with?
Dr. Herendeen's most frequent co-authors are James T. Kryzanski, MD (1 shared paper) and Joel Michael Oster, MD (1 shared paper).
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