Caroline Ann Callahan
- Medicare patients, 2024
- 25
- Part D claims, 2024
- 164
- Hospital affiliations
- 1
- Industry payments
- $118
- Medical groups
- 2
- Practice address
- 55 Fruit Street, Boston, MA 02114
- Practice phone
- Call (617) 726-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Caroline Callahan'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.
Caroline Ann Callahan is a nurse practitioner in Boston, Massachusetts
Caroline Callahan practices at Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham.
Caroline Callahan's NPI, 1962913525, was assigned on October 23, 2017. Caroline Callahan holds Massachusetts license 271683.
- NPI
- 1962913525NPI Registry (opens in a new tab)
- NPI enumeration date
- October 23, 2017
- NPI status
- Active
- Practice phone
- (617) 726-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Caroline Ann Callahan practices at Massachusetts General Hospital in Boston, Massachusetts
Caroline Callahan's primary practice is Massachusetts General Hospital, at 55 Fruit Street, Boston, MA 02114 in Suffolk County. The practice phone is (617) 726-2000.
- Massachusetts General Hospital55 Fruit Street, Boston, MA 02114 · Suffolk CountyPhone(617) 726-2000
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Caroline Ann Callahan is affiliated with 1 site of care and 2 medical groups
Caroline Callahan's primary practice is Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham. The medical group on file is Massachusetts General Physicians Organization (MGPO). Dmand AI also links Caroline Callahan to 1 more medical group, named with a free account.
Sources: Dmand AI Affiliation Data; Doctors and Clinicians National Downloadable File (CMS); and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Caroline Ann Callahan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Caroline Callahan practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Massachusetts General Hospital | Available with a free account |
| +1 medical group | 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 Mass General Brigham and 6.2K+ hospitals, with verified contacts in the same login.
Caroline Ann Callahan is one of 2,511 nurse practitioners in Massachusetts
Nurse practitioner is Caroline Callahan's primary specialty in the NPI Registry, under taxonomy code 363L00000X. Caroline Callahan is licensed in Massachusetts.
Specialties and state licenses
- Nurse practitioner, MassachusettsPrimary
Nurse practitioners near Caroline Callahan
Counts of nurse practitioners 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
Caroline Ann Callahan treated 25 Medicare patients in 2024, average age 75
CMS counts 25 Medicare patients who saw Caroline Callahan in 2024. The largest group is 75 to 84, with 12 patients. 64% of them have high blood pressure, and 64% have high cholesterol. Their average risk score is 3.12, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Caroline Callahan's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Caroline Callahan's Medicare patients by sex, 2024
- Women1248%
- Men1352%
Chronic conditions among Caroline Callahan's Medicare patients, 2024
- High blood pressure64%
- High cholesterol64%
Share of Medicare patients with each condition. A patient can have several.
Source: Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Caroline Ann Callahan wrote 164 Medicare Part D claims in 2024
In 2024, Caroline Callahan wrote 164 Medicare Part D claims for 76 patients. 82% of them were for generic drugs.
Caroline Callahan's Part D claims by kind of drug, 2024
- Generic134 claims82%
- Brand-name30 claims18%
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Caroline Ann Callahan received $118 in industry payments in 2025
CMS Open Payments shows 1 general payment to Caroline Callahan from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. Bristol-Myers Squibb Company paid the most, $118.
Companies that paid Caroline Callahan 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 Caroline Ann Callahan'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 DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Dmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Medicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider (CMS) (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 Caroline Ann Callahan
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Caroline Ann Callahan's NPI number?
Caroline Ann Callahan's NPI number is 1962913525. It was assigned on October 23, 2017, and it is active in the NPI Registry.
What does Caroline Ann Callahan specialize in?
Caroline Ann Callahan is a nurse practitioner in Boston, Massachusetts. The primary specialty in the NPI Registry is Nurse Practitioner (taxonomy code 363L00000X).
Where does Caroline Ann Callahan practice?
Caroline Callahan practices at 55 Fruit Street, Boston, MA 02114. Caroline Callahan's primary practice is Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham. Dmand AI also links Caroline Callahan to 1 medical group.
What is Caroline Ann Callahan's office phone number?
The practice phone on file for Caroline Callahan is (617) 726-2000.
What is Caroline Ann Callahan's medical license number?
Caroline Callahan holds Massachusetts license 271683.
Which hospitals is Caroline Ann Callahan affiliated with?
Caroline Callahan practices at Massachusetts General Hospital in Boston, Massachusetts.
What medical group is Caroline Ann Callahan part of?
Caroline Callahan is linked to Massachusetts General Physicians Organization (MGPO). Dmand AI links Caroline Callahan to 1 more medical group.
How many Medicare patients does Caroline Ann Callahan see?
CMS counts 25 Medicare patients who saw Caroline Callahan in 2024, with an average age of 75.
Has Caroline Ann Callahan received payments from drug or device companies?
CMS Open Payments shows $118 in general payments to Caroline Callahan from 1 company from 2025 to 2025. The largest total came from Bristol-Myers Squibb Company.
How long has Caroline Ann Callahan been practicing?
Caroline Callahan's NPI was assigned in 2017.
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