Dr. Benjamin Martin Callahan, MD
- Medicare services, 2024
- 607
- Medicare patients, 2024
- 546
- Part D claims, 2024
- 214
- Hospital affiliations
- 5
- Industry payments
- $32
- Practice address
- One Saint Joseph Drive, Lexington, KY 40504
- Practice phone
- Call (859) 313-1000
- 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. Benjamin Martin Callahan is an emergency medicine physician in Lexington, Kentucky
Dr. Callahan practices at Saint Joseph Hospital in Lexington, Kentucky, part of CommonSpirit Health.
Dr. Callahan's NPI, 1609923481, was assigned on January 4, 2007. Dr. Callahan graduated from University of Kentucky College of Medicine in 2005. Dr. Callahan holds Kentucky license 41620.
- NPI
- 1609923481NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2668579509
- NPI enumeration date
- January 4, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (859) 313-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 47
- Medical school graduation
- 2005
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Benjamin Martin Callahan practices at 2 locations in Lexington, Kentucky
Dr. Callahan's primary practice is Saint Joseph Hospital, at One Saint Joseph Drive, Lexington, KY 40504 in Fayette County. The practice phone is (859) 313-1000. Dr. Callahan also practices at St Joseph Hospital, 1 St Joseph Dr, Lexington, KY 40504.
- Saint Joseph HospitalPrimaryOne Saint Joseph Drive, Lexington, KY 40504 · Fayette CountyPhone(859) 313-1000
- St Joseph Hospital1 St Joseph Dr, Lexington, KY 40504 · Fayette CountyPhone(859) 313-1000
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; and Dmand AI Practice Data
Dr. Benjamin Martin Callahan is affiliated with 6 sites of care and 1 medical group
Dr. Callahan's primary practice is Saint Joseph Hospital in Lexington, Kentucky, part of CommonSpirit Health. Dr. Callahan is also affiliated with CommonSpirit - Saint Joseph Hospital - London. The medical group on file is Lexington Clinic. Dmand AI also links Dr. Callahan to 3 more hospitals and 1 group practice or clinic, 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. Benjamin Martin Callahan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Callahan practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Saint Joseph Hospital | Available with a free account |
| +5 more affiliated sites | 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 CommonSpirit Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Benjamin Martin Callahan is one of 803 emergency medicine physicians in Kentucky
Emergency medicine is Dr. Callahan's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Callahan is licensed in Kentucky.
Specialties and state licenses
- Emergency medicine, KentuckyPrimary
Emergency medicine physicians near Dr. Callahan
Counts of emergency medicine physicians 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. Benjamin Martin Callahan billed Medicare for 607 services in 2024
CMS data shows 607 Medicare services from Dr. Callahan across 4 procedure codes in 2024, for 546 Medicare patients. Medicare paid $69,260 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Callahan's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 5672024: 6077%
Dr. Callahan compared with the Kentucky median for emergency medicine physicians, 2024
- Dr. Callahan
- Kentucky median
- Medicare services
- 607vs 3022.0 times
- Medicare patients
- 546vs 2722.0 times
- Part D claims
- 105vs 9313% above
Medians across 814 emergency medicine physicians in Kentucky 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 emergency medicine physicians in Kentucky.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Benjamin Martin Callahan treated 546 Medicare patients in 2024, average age 74
CMS counts 546 Medicare patients who saw Dr. Callahan in 2024. The largest group is 75 to 84, with 188 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 24% are also on Medicaid. Their average risk score is 1.90, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Callahan's median patient age at 63, with 58% women.
Dr. Callahan's Medicare patients by age, 2024
Dr. Callahan's Medicare patients by sex, 2024
- Women31257%
- Men23443%
Chronic conditions among Dr. Callahan's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis54%
- Anxiety46%
- Chronic kidney disease41%
- Diabetes41%
- Mood disorders41%
- Ischemic heart disease38%
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 63
Patient panel by sex, all payers
- Women58%
- Men42%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Benjamin Martin Callahan wrote 214 Medicare Part D claims in 2024
In 2024, Dr. Callahan wrote 214 Medicare Part D claims for 172 patients. 93% of them were for generic drugs. CMS names the drug for 105 of them, across 7 drugs with 11 or more claims each, at $559 in total drug cost. In 2023, CMS named 31 claims across 2 drugs.
Dr. Callahan's Part D claims by kind of drug, 2024
- Generic199 claims93%
- Brand-name15 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
- Opioids20%42 of 214 claims
- Antibiotics31%67 of 214 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: 312024: 105239%
Drugs named by CMS: 7 in 2024, 2 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
How Dr. Benjamin Martin Callahan takes part in Medicare
Dr. Callahan 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)
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Dr. Benjamin Martin Callahan received $32 in industry payments in 2016
CMS Open Payments shows 2 general payments to Dr. Callahan from 1 drug or device company in 2016. Food and beverage make up the largest share, 100% of the total. Janssen Pharmaceuticals, Inc paid the most, $32.
Companies that paid Dr. Callahan the most, 2016 to 2016
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Benjamin Martin Callahan graduated from University of Kentucky College of Medicine
Dr. Callahan graduated from University of Kentucky College of Medicine in 2005.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Benjamin Martin 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 Affiliation DataDmand AI Practice 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) |
| 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. Benjamin Martin 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. Benjamin Martin Callahan's NPI number?
Dr. Benjamin Martin Callahan's NPI number is 1609923481. It was assigned on January 4, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Benjamin Martin Callahan?
Dr. Benjamin Martin Callahan is an emergency medicine physician in Lexington, Kentucky. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Benjamin Martin Callahan practice?
Dr. Callahan practices at One Saint Joseph Drive, Lexington, KY 40504. Dr. Callahan also practices at 1 St Joseph Dr, Lexington, KY 40504. Dr. Callahan's primary practice is Saint Joseph Hospital in Lexington, Kentucky, part of CommonSpirit Health. Dmand AI also links Dr. Callahan to 3 hospitals and 1 group practice or clinic.
What is Dr. Benjamin Martin Callahan's office phone number?
The practice phone on file for Dr. Callahan is (859) 313-1000.
What is Dr. Benjamin Martin Callahan's medical license number?
Dr. Callahan holds Kentucky license 41620.
Which hospitals is Dr. Benjamin Martin Callahan affiliated with?
Dr. Callahan practices at Saint Joseph Hospital in Lexington, Kentucky. Dr. Callahan is also affiliated with CommonSpirit - Saint Joseph Hospital - London. Dmand AI links Dr. Callahan to 3 more hospitals.
What medical group is Dr. Benjamin Martin Callahan part of?
Dr. Callahan is linked to Lexington Clinic.
Does Dr. Benjamin Martin Callahan accept Medicare?
Yes. CMS data shows Dr. Callahan billed Medicare for 607 services in 2024, and Dr. Callahan accepts Medicare assignment.
How many Medicare patients does Dr. Benjamin Martin Callahan see?
CMS counts 546 Medicare patients who saw Dr. Callahan in 2024, with an average age of 74.
What services does Dr. Benjamin Martin Callahan bill to Medicare?
In 2024, Dr. Callahan's most billed Medicare services were emergency department visit (99285), emergency department visit (99284) and critical care (99291).
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Where did Dr. Benjamin Martin Callahan go to medical school?
Dr. Callahan graduated from University of Kentucky College of Medicine in 2005.
What drugs does Dr. Benjamin Martin Callahan prescribe most?
In 2024 Medicare Part D data, Dr. Callahan's most prescribed drugs by claims were Methylprednisolone, Prednisone and Hydrocodone-Acetaminophen.
Has Dr. Benjamin Martin Callahan received payments from drug or device companies?
CMS Open Payments shows $32 in general payments to Dr. Callahan from 1 company from 2016 to 2016. The largest total came from Janssen Pharmaceuticals, Inc.
How long has Dr. Benjamin Martin Callahan been practicing?
Dr. Callahan graduated from medical school in 2005, 21 years ago.
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