John Cassidy Duffy, DC
- Medicare patients, 2024
- 11
- Hospital affiliations
- 1
- State license
- 1
- Year NPI issued
- 2007
- Practice address
- 330 Mount Auburn Street, Cambridge, MA 02138
- Practice phone
- Call (617) 492-3500
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find John Duffy'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.
John Cassidy Duffy is a chiropractor in Cambridge, Massachusetts
John Duffy practices at Mount Auburn Hospital in Cambridge, Massachusetts, part of Beth Israel Lahey Health.
John Duffy's NPI, 1942481627, was assigned on November 21, 2007. John Duffy graduated from Life Chiropractic College in 1991. John Duffy holds Massachusetts license 1644.
- NPI
- 1942481627NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6305919135
- NPI enumeration date
- November 21, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (617) 492-3500
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 61
- Medical school graduation
- 1991
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
John Cassidy Duffy practices at Mount Auburn Hospital in Cambridge, Massachusetts
John Duffy's primary practice is Mount Auburn Hospital, at 330 Mount Auburn Street, Cambridge, MA 02138 in Middlesex County. The practice phone is (617) 492-3500.
- Mount Auburn Hospital330 Mount Auburn Street, Cambridge, MA 02138 · Middlesex CountyPhone(617) 492-3500
Source: Dmand AI Affiliation Data
John Cassidy Duffy is affiliated with 1 site of care
John Duffy's primary practice is Mount Auburn Hospital in Cambridge, Massachusetts, part of Beth Israel Lahey Health.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at John Cassidy Duffy's practice
Dmand AI tracks the electronic health record (EHR) system at each site where John Duffy practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mount Auburn Hospital | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Beth Israel Lahey Health and 6.2K+ hospitals, with verified contacts in the same login.
John Cassidy Duffy is one of 854 chiropractors in Massachusetts
Chiropractor is John Duffy's primary specialty in the NPI Registry, under taxonomy code 111N00000X. John Duffy is licensed in Massachusetts.
Specialties and state licenses
- Chiropractor, MassachusettsPrimary
Chiropractors near John Duffy
Counts of chiropractors 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
John Cassidy Duffy treated 11 Medicare patients in 2024, average age 74
CMS counts 11 Medicare patients who saw John Duffy in 2024. The largest group is under 65, with 0 patients. Their average risk score is 0.70, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts John Duffy's median patient age at 44, with 60% women.
John Duffy's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
John Duffy's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 44
Patient panel by sex, all payers
- Women60%
- Men40%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How John Cassidy Duffy takes part in Medicare
John Duffy 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)
John Cassidy Duffy graduated from Life Chiropractic College
John Duffy graduated from Life Chiropractic College in 1991.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for John Cassidy Duffy'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 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) |
| Training, board certification and memberships | Dmand AI Professional Profile 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 John Cassidy Duffy
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is John Cassidy Duffy's NPI number?
John Cassidy Duffy's NPI number is 1942481627. It was assigned on November 21, 2007, and it is active in the NPI Registry.
What does John Cassidy Duffy specialize in?
John Cassidy Duffy is a chiropractor in Cambridge, Massachusetts. The primary specialty in the NPI Registry is Chiropractor (taxonomy code 111N00000X).
Where does John Cassidy Duffy practice?
John Duffy practices at 330 Mount Auburn Street, Cambridge, MA 02138. John Duffy's primary practice is Mount Auburn Hospital in Cambridge, Massachusetts, part of Beth Israel Lahey Health.
What is John Cassidy Duffy's office phone number?
The practice phone on file for John Duffy is (617) 492-3500.
What is John Cassidy Duffy's medical license number?
John Duffy holds Massachusetts license 1644.
Which hospitals is John Cassidy Duffy affiliated with?
John Duffy practices at Mount Auburn Hospital in Cambridge, Massachusetts.
Does John Cassidy Duffy accept Medicare?
Yes. CMS lists John Duffy as accepting Medicare assignment.
How many Medicare patients does John Cassidy Duffy see?
CMS counts 11 Medicare patients who saw John Duffy in 2024, with an average age of 74.
Where did John Cassidy Duffy go to medical school?
John Duffy graduated from Life Chiropractic College in 1991.
How long has John Cassidy Duffy been practicing?
John Duffy graduated from medical school in 1991, 35 years ago.
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