Dr. Kristin M. O'Neil-Callahan, MD
- Medicare services, 2024
- 1,224
- Medicare patients, 2024
- 330
- Part D claims, 2024
- 4,091
- Hospital affiliations
- 5
- Medical group
- 1
- Practice address
- 81 Highland Ave, Salem, MA 01970
- Practice phone
- Call (978) 354-2065
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
MGB Salem Hospital
Salem, Massachusetts
Find Dr. O'Neil-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.
Dr. Kristin M. O'Neil-Callahan is an internist in Salem, Massachusetts
Dr. O'Neil-Callahan practices at MGB Salem Hospital in Salem, Massachusetts.
Dr. O'Neil-Callahan's NPI, 1215985445, was assigned on May 4, 2006. Dr. O'Neil-Callahan graduated from Georgetown University School of Medicine in 1999. Dr. O'Neil-Callahan holds Massachusetts license 214128.
- NPI
- 1215985445NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7315927662
- NPI enumeration date
- May 4, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (978) 354-2065
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 53
- Medical school graduation
- 1999
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Kristin M. O'Neil-Callahan practices at MGB Salem Hospital in Salem, Massachusetts
Dr. O'Neil-Callahan's primary practice is MGB Salem Hospital, at 81 Highland Ave, Salem, MA 01970 in Essex County. The practice phone is (978) 354-2065.
- MGB Salem Hospital81 Highland Ave, Salem, MA 01970 · Essex CountyPhone(978) 354-2065
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Kristin M. O'Neil-Callahan is affiliated with 8 sites of care and 1 medical group
Dr. O'Neil-Callahan's primary practice is MGB Salem Hospital in Salem, Massachusetts. Dr. O'Neil-Callahan is also affiliated with Salem Hospital. The medical group on file is Mass General Brigham (formerly North Shore Physicians Group). Dmand AI also links Dr. O'Neil-Callahan to 4 more hospitals and 2 home health agencies, each named with a free account.
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. Kristin M. O'Neil-Callahan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. O'Neil-Callahan practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| MGB Salem Hospital | Available with a free account |
| +7 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Kristin M. O'Neil-Callahan is one of 5,528 internists in Massachusetts
Internal medicine is Dr. O'Neil-Callahan's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. O'Neil-Callahan is licensed in Massachusetts.
Specialties and state licenses
- Internal medicine, MassachusettsPrimary
Internists near Dr. O'Neil-Callahan
Counts of internists 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. Kristin M. O'Neil-Callahan billed Medicare for 1,224 services in 2024
CMS data shows 1,224 Medicare services from Dr. O'Neil-Callahan across 15 procedure codes in 2024, for 330 Medicare patients. Medicare paid $78,619 for them. Every service was in an office.
Dr. O'Neil-Callahan's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 5372024: 43319%
- Other services
- 2023: 3602024: 42318%
- Surgery
- 2023: 2262024: 24810%
- Tests and treatments
- 2023: 1132024: 1066%
- Lab and pathology
- 2023: 182024: 1422%
Dr. O'Neil-Callahan compared with the Massachusetts median for internists, 2024
- Dr. O'Neil-Callahan
- Massachusetts median
- Medicare services
- 1,224vs 4312.8 times
- Medicare patients
- 330vs 19470% above
- Part D claims
- 3,600vs 4029.0 times
Medians across 5,369 internists in Massachusetts with Dmand AI profiles that report each measure.
Dr. O'Neil-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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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Kristin M. O'Neil-Callahan treated 330 Medicare patients in 2024, average age 76
CMS counts 330 Medicare patients who saw Dr. O'Neil-Callahan in 2024. The largest group is 75 to 84, with 144 patients. 70% of them have high cholesterol, and 65% have high blood pressure. 6% are also on Medicaid. Their average risk score is 0.97, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. O'Neil-Callahan's median patient age at 70, with 82% women.
Dr. O'Neil-Callahan's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. O'Neil-Callahan's Medicare patients by sex, 2024
- Women27383%
- Men5717%
Chronic conditions among Dr. O'Neil-Callahan's Medicare patients, 2024
- High cholesterol70%
- High blood pressure65%
- Arthritis44%
- Anxiety23%
- Cancer22%
- Chronic kidney disease21%
- Osteoporosis21%
- Ischemic heart disease17%
Share of Medicare patients with each condition. A patient can have several.
Dr. O'Neil-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 70
Patient panel by sex, all payers
- Women82%
- Men17%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Kristin M. O'Neil-Callahan wrote 4,091 Medicare Part D claims in 2024
In 2024, Dr. O'Neil-Callahan wrote 4,091 Medicare Part D claims for 496 patients. 93% of them were for generic drugs. CMS names the drug for 3,600 of them, across 74 drugs with 11 or more claims each, at $122,211 in total drug cost. In 2023, CMS named 3,232 claims across 70 drugs.
Dr. O'Neil-Callahan's Part D claims by kind of drug, 2024
- Generic3,823 claims93%
- Brand-name and other268 claims7%
Dr. O'Neil-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. O'Neil-Callahan's Part D claims, 2024
- Opioids0%16 of 4,091 claims
- Antibiotics2%84 of 4,091 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: 3,2322024: 3,60011%
Drugs named by CMS: 74 in 2024, 70 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. Kristin M. O'Neil-Callahan offers telehealth to Medicare patients
Dr. O'Neil-Callahan accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. O'Neil-Callahan as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Kristin M. O'Neil-Callahan graduated from Georgetown University School of Medicine
Dr. O'Neil-Callahan graduated from Georgetown University School of Medicine in 1999.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Kristin M. O'Neil-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 | 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 |
| 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) |
| 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. Kristin M. O'Neil-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. Kristin M. O'Neil-Callahan's NPI number?
Dr. Kristin M. O'Neil-Callahan's NPI number is 1215985445. It was assigned on May 4, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Kristin M. O'Neil-Callahan?
Dr. Kristin M. O'Neil-Callahan is an internist in Salem, Massachusetts. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Kristin M. O'Neil-Callahan practice?
Dr. O'Neil-Callahan practices at 81 Highland Ave, Salem, MA 01970. Dr. O'Neil-Callahan's primary practice is MGB Salem Hospital in Salem, Massachusetts. Dmand AI also links Dr. O'Neil-Callahan to 4 hospitals and 2 home health agencies.
What is Dr. Kristin M. O'Neil-Callahan's office phone number?
The practice phone on file for Dr. O'Neil-Callahan is (978) 354-2065.
What is Dr. Kristin M. O'Neil-Callahan's medical license number?
Dr. O'Neil-Callahan holds Massachusetts license 214128.
Which hospitals is Dr. Kristin M. O'Neil-Callahan affiliated with?
Dr. O'Neil-Callahan is affiliated with Salem Hospital. Dmand AI links Dr. O'Neil-Callahan to 4 more hospitals.
What medical group is Dr. Kristin M. O'Neil-Callahan part of?
Dr. O'Neil-Callahan is linked to Mass General Brigham (formerly North Shore Physicians Group).
Does Dr. Kristin M. O'Neil-Callahan accept Medicare?
Yes. CMS data shows Dr. O'Neil-Callahan billed Medicare for 1,224 services in 2024, and Dr. O'Neil-Callahan accepts Medicare assignment.
Does Dr. Kristin M. O'Neil-Callahan offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. O'Neil-Callahan as offering telehealth services.
How many Medicare patients does Dr. Kristin M. O'Neil-Callahan see?
CMS counts 330 Medicare patients who saw Dr. O'Neil-Callahan in 2024, with an average age of 76.
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What services does Dr. Kristin M. O'Neil-Callahan bill to Medicare?
In 2024, Dr. O'Neil-Callahan's most billed Medicare services were office visit, established patient (99214), surgery: heart and blood vessels (36415) and medicare service (G0439).
Where did Dr. Kristin M. O'Neil-Callahan go to medical school?
Dr. O'Neil-Callahan graduated from Georgetown University School of Medicine in 1999.
What drugs does Dr. Kristin M. O'Neil-Callahan prescribe most?
In 2024 Medicare Part D data, Dr. O'Neil-Callahan's most prescribed drugs by claims were Atorvastatin Calcium, Lisinopril and Levothyroxine Sodium.
How long has Dr. Kristin M. O'Neil-Callahan been practicing?
Dr. O'Neil-Callahan graduated from medical school in 1999, 27 years ago.
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