Dr. Mary B. Callahan, DO
- Medicare services, 2024
- 1,601
- Medicare patients, 2024
- 251
- Part D claims, 2024
- 2,246
- MIPS score, 2024
- 86
- Hospital affiliations
- 3
- Practice address
- 75 Francis Street, Boston, MA 02115
- Practice phone
- Call (617) 732-5500
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Callahan's professional email, personal email and mobile number
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Dr. Mary B. Callahan is a cardiologist in Boston, Massachusetts
Dr. Callahan practices at Brigham and Women's Hospital in Boston, Massachusetts, part of Mass General Brigham.
Dr. Callahan's NPI, 1518968882, was assigned on August 9, 2005. Dr. Callahan graduated from University of New England, College of Osteo Medicine in 1992. Dr. Callahan holds Massachusetts license 160179.
- NPI
- 1518968882NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1254422603
- NPI enumeration date
- August 9, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (617) 732-5500
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 60
- Medical school graduation
- 1992
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Mary B. Callahan practices at Brigham and Women's Hospital in Boston, Massachusetts
Dr. Callahan's primary practice is Brigham and Women's Hospital, at 75 Francis Street, Boston, MA 02115 in Suffolk County. The practice phone is (617) 732-5500.
- Brigham and Women's Hospital75 Francis Street, Boston, MA 02115 · Suffolk CountyPhone(617) 732-5500
Source: Dmand AI Affiliation Data
Dr. Mary B. Callahan is affiliated with 5 sites of care
Dr. Callahan's primary practice is Brigham and Women's Hospital in Boston, Massachusetts, part of Mass General Brigham. Dr. Callahan is also affiliated with Cape Cod Hospital. Dmand AI also links Dr. Callahan to 1 more hospital, 1 physician office and 1 hospital outpatient department, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Mary B. Callahan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Callahan practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Brigham and Women's Hospital | Available with a free account |
| +4 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Mary B. Callahan is one of 840 cardiologists in Massachusetts
Cardiovascular disease is Dr. Callahan's primary specialty in the NPI Registry, under taxonomy code 207RC0000X. Dr. Callahan is licensed in Massachusetts.
Specialties and state licenses
- Cardiovascular disease, MassachusettsPrimary
Cardiologists near Dr. Callahan
Counts of cardiologists 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. Mary B. Callahan billed Medicare for 1,601 services in 2024
CMS data shows 1,601 Medicare services from Dr. Callahan across 10 procedure codes in 2024, for 251 Medicare patients. Medicare paid $126,828 for them. Every service was in an office.
Dr. Callahan's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 6422024: 70810%
- Tests and treatments
- 2023: 6482024: 6541%
- Other services
- 2023: 962024: 10813%
- Drugs given in the office
- 2023: 682024: 7612%
- Imaging
- 2023: 482024: 5515%
Dr. Callahan compared with the Massachusetts median for cardiologists, 2024
- Dr. Callahan
- Massachusetts median
- Medicare services
- 1,601vs 1,612Close to median
- Medicare patients
- 251vs 95674% below
- Part D claims
- 2,024vs 8462.4 times
Medians across 817 cardiologists in Massachusetts with Dmand AI profiles that report each measure.
Dr. Callahan's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Callahan and other cardiologists in Massachusetts.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mary B. Callahan treated 251 Medicare patients in 2024, average age 75
CMS counts 251 Medicare patients who saw Dr. Callahan in 2024. The largest group is 65 to 74, with 116 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 13% are also on Medicaid. Their average risk score is 1.10, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Callahan's median patient age at 71, with 62% women.
Dr. Callahan's Medicare patients by age, 2024
Dr. Callahan's Medicare patients by sex, 2024
- Women14558%
- Men10642%
Chronic conditions among Dr. Callahan's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Ischemic heart disease55%
- Arthritis46%
- Anxiety30%
- Diabetes27%
- Mood disorders27%
- Atrial fibrillation25%
Share of Medicare patients with each condition. A patient can have several.
Dr. Callahan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 71
Patient panel by sex, all payers
- Women62%
- Men37%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Mary B. Callahan wrote 2,246 Medicare Part D claims in 2024
In 2024, Dr. Callahan wrote 2,246 Medicare Part D claims for 257 patients. 93% of them were for generic drugs. CMS names the drug for 2,024 of them, across 36 drugs with 11 or more claims each, at $220,348 in total drug cost. In 2023, CMS named 1,802 claims across 33 drugs.
Dr. Callahan's Part D claims by kind of drug, 2024
- Generic2,089 claims93%
- Brand-name157 claims7%
Dr. Callahan's most prescribed drugs by claims, 2024
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. Callahan's Part D claims, 2024
- Antibiotics1%20 of 2,246 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1,8022024: 2,02412%
Drugs named by CMS: 36 in 2024, 33 in 2023.
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
Dr. Mary B. Callahan scored 86 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 86 out of 100 for Dr. Callahan for performance year 2024, reported individually. Dr. Callahan accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Callahan's MIPS scores, performance year 2024
- 86of 100Final score
- 99.4of 100Quality
- 87of 100Promoting Interoperability
- 40of 100Improvement Activities
- 64of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Mary B. Callahan received $5,675 in industry payments from 2016 to 2025
CMS Open Payments shows 268 general payments to Dr. Callahan from 20 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Janssen Pharmaceuticals, Inc paid the most, $1,778.
General payments to Dr. Callahan by program year, 2016 to 2025
General payments to Dr. Callahan by kind, 2016 to 2025
- Food and beverage$5,652100%
- Education$220%
Companies that paid Dr. Callahan the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Mary B. Callahan graduated from University of New England, College of Osteo Medicine
Dr. Callahan graduated from University of New England, College of Osteo Medicine in 1992.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Mary B. 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 Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| 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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Industry payments | Open Payments (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 Dr. Mary B. 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 Dr. Mary B. Callahan's NPI number?
Dr. Mary B. Callahan's NPI number is 1518968882. It was assigned on August 9, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Mary B. Callahan?
Dr. Mary B. Callahan is a cardiologist in Boston, Massachusetts. The primary specialty in the NPI Registry is Cardiovascular Disease Physician (taxonomy code 207RC0000X).
Where does Dr. Mary B. Callahan practice?
Dr. Callahan practices at 75 Francis Street, Boston, MA 02115. Dr. Callahan's primary practice is Brigham and Women's Hospital in Boston, Massachusetts, part of Mass General Brigham. Dmand AI also links Dr. Callahan to 1 hospital, 1 physician office and 1 hospital outpatient department.
What is Dr. Mary B. Callahan's office phone number?
The practice phone on file for Dr. Callahan is (617) 732-5500.
What is Dr. Mary B. Callahan's medical license number?
Dr. Callahan holds Massachusetts license 160179.
Which hospitals is Dr. Mary B. Callahan affiliated with?
Dr. Callahan practices at Brigham and Women's Hospital in Boston, Massachusetts. Dr. Callahan is also affiliated with Cape Cod Hospital. Dmand AI links Dr. Callahan to 1 more hospital.
Does Dr. Mary B. Callahan accept Medicare?
Yes. CMS data shows Dr. Callahan billed Medicare for 1,601 services in 2024, and Dr. Callahan accepts Medicare assignment.
What is Dr. Mary B. Callahan's MIPS score?
Dr. Callahan's MIPS final score for performance year 2024 is 86 out of 100, reported individually.
How many Medicare patients does Dr. Mary B. Callahan see?
CMS counts 251 Medicare patients who saw Dr. Callahan in 2024, with an average age of 75.
What services does Dr. Mary B. Callahan bill to Medicare?
In 2024, Dr. Callahan's most billed Medicare services were office visit, established patient (99214), heart test or procedure (93000) and heart test or procedure (93306).
Show 4 more questionsShow fewer questions
Where did Dr. Mary B. Callahan go to medical school?
Dr. Callahan graduated from University of New England, College of Osteo Medicine in 1992.
What drugs does Dr. Mary B. Callahan prescribe most?
In 2024 Medicare Part D data, Dr. Callahan's most prescribed drugs by claims were Metoprolol Succinate, Valsartan and Rosuvastatin Calcium.
Has Dr. Mary B. Callahan received payments from drug or device companies?
CMS Open Payments shows $5,675 in general payments to Dr. Callahan from 20 companies from 2016 to 2025. The largest total came from Janssen Pharmaceuticals, Inc.
How long has Dr. Mary B. Callahan been practicing?
Dr. Callahan graduated from medical school in 1992, 34 years ago.
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