Dr. Alfred Samuel Callahan III, MD
- Medicare services, 2024
- 1,376
- Medicare patients, 2024
- 648
- Part D claims, 2024
- 531
- Publications
- 6
- Hospital affiliations
- 1
- Practice address
- 2000 Glen Echo Rd, Nashville, TN 37215-2857
- Practice phone
- Call (615) 297-5300
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Stroke & Heart Attack Prevention Center
Physician office · Nashville, Tennessee
Find Dr. 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. Alfred Samuel Callahan III is a neurologist in Nashville, Tennessee
Dr. Callahan practices at Stroke & Heart Attack Prevention Center in Nashville, Tennessee.
Dr. Callahan's NPI, 1649206715, was assigned on June 23, 2006. Dr. Callahan graduated from Vanderbilt University School of Medicine in 1975. Dr. Callahan holds Tennessee license MD009933.
- NPI
- 1649206715NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9032014055
- NPI enumeration date
- June 23, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (615) 297-5300
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 77
- Medical school graduation
- 1975
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Alfred Samuel Callahan III practices at Stroke & Heart Attack Prevention Center in Nashville, Tennessee
Dr. Callahan's primary practice is Stroke & Heart Attack Prevention Center, at 2000 Glen Echo Rd, Nashville, TN 37215-2857. The practice phone is (615) 297-5300.
- Stroke & Heart Attack Prevention Center2000 Glen Echo Rd, Nashville, TN 37215-2857Phone(615) 297-5300
Source: Dmand AI Affiliation Data
Dr. Alfred Samuel Callahan III is affiliated with 2 sites of care
Dr. Callahan's primary practice is Stroke & Heart Attack Prevention Center in Nashville, Tennessee. Dr. Callahan is also affiliated with Vanderbilt University Medical Center.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Alfred Samuel Callahan III's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Callahan practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Stroke & Heart Attack Prevention Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Alfred Samuel Callahan III is one of 350 neurologists in Tennessee
Neurology is Dr. Callahan's primary specialty in the NPI Registry, under taxonomy code 2084N0400X. Dr. Callahan is licensed in Tennessee.
Specialties and state licenses
- Neurology, TennesseePrimary
Neurologists near Dr. Callahan
Counts of neurologists 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. Alfred Samuel Callahan III billed Medicare for 1,376 services in 2024
CMS data shows 1,376 Medicare services from Dr. Callahan across 3 procedure codes in 2024, for 648 Medicare patients. Medicare paid $116,345 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: 6282024: 72015%
- Tests and treatments
- 2023: 5422024: 65621%
Dr. Callahan compared with the Tennessee median for neurologists, 2024
- Dr. Callahan
- Tennessee median
- Medicare services
- 1,376vs 3983.5 times
- Medicare patients
- 648vs 2352.8 times
- Part D claims
- 406vs 63836% below
Medians across 344 neurologists in Tennessee 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 neurologists in Tennessee.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Alfred Samuel Callahan III treated 648 Medicare patients in 2024, average age 74
CMS counts 648 Medicare patients who saw Dr. Callahan in 2024. The largest group is 65 to 74, with 374 patients. 75% of them have high cholesterol, and 71% have high blood pressure. Their average risk score is 0.82, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Callahan's median patient age at 68, with 44% women.
Dr. Callahan's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Callahan's Medicare patients by sex, 2024
- Women31048%
- Men33852%
Chronic conditions among Dr. Callahan's Medicare patients, 2024
- High cholesterol75%
- High blood pressure71%
- Arthritis40%
- Ischemic heart disease30%
- Chronic kidney disease19%
- Anxiety18%
- Atrial fibrillation17%
- Diabetes16%
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 68
Patient panel by sex, all payers
- Women44%
- Men55%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Alfred Samuel Callahan III wrote 531 Medicare Part D claims in 2024
In 2024, Dr. Callahan wrote 531 Medicare Part D claims for 93 patients. 97% of them were for generic drugs. CMS names the drug for 406 of them, across 16 drugs with 11 or more claims each, at $7,000 in total drug cost. In 2023, CMS named 366 claims across 13 drugs.
Dr. Callahan's Part D claims by kind of drug, 2024
- Generic513 claims97%
- Brand-name and other18 claims3%
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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 3662024: 40611%
Drugs named by CMS: 16 in 2024, 13 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. Alfred Samuel Callahan III scored 0 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 0 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
- 0of 100Final score
- 0of 100Quality
- 0of 100Improvement Activities
- 0of 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. Alfred Samuel Callahan III has 6 publications on record
Dmand AI links 6 papers to Dr. Callahan, published from 2011 to 2020. 2020 was the busiest year, with 2. Dr. Callahan's most frequent co-authors are Larry Bruce Goldstein, MD, Vito Campese, MD and Keith B. Churchwell, MD.
Dr. Callahan's papers by year, 2011 to 2020
Dr. Callahan's most frequent co-authors
- Larry Bruce Goldstein, MD5 shared papers
- Vito Campese, MD1 shared paper
- Keith B. Churchwell, MD1 shared paper
Recent publications by Dr. Callahan
See who Dr. Callahan researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Callahan works with, so you can find a warm path to the right neurologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Alfred Samuel Callahan III received $115,422 in industry payments from 2016 to 2022
CMS Open Payments shows 150 general payments to Dr. Callahan from 4 drug and device companies from 2016 to 2022. Speaker and faculty fees make up the largest share, 77% of the total. Pfizer Inc. paid the most, $94,745.
General payments to Dr. Callahan by program year, 2016 to 2022
General payments to Dr. Callahan by kind, 2016 to 2022
- Speaker and faculty fees$89,32577%
- Travel and lodging$13,84012%
- Consulting fees$10,3009%
- Food and beverage$1,9572%
Companies that paid Dr. Callahan the most, 2016 to 2022
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Alfred Samuel Callahan III graduated from Vanderbilt University School of Medicine
Dr. Callahan graduated from Vanderbilt University School of Medicine in 1975.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Alfred Samuel Callahan III'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 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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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. Alfred Samuel Callahan III
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. Alfred Samuel Callahan III's NPI number?
Dr. Alfred Samuel Callahan III's NPI number is 1649206715. It was assigned on June 23, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Alfred Samuel Callahan III?
Dr. Alfred Samuel Callahan III is a neurologist in Nashville, Tennessee. The primary specialty in the NPI Registry is Neurology Physician (taxonomy code 2084N0400X).
Where does Dr. Alfred Samuel Callahan III practice?
Dr. Callahan practices at 2000 Glen Echo Rd, Nashville, TN 37215-2857. Dr. Callahan's primary practice is Stroke & Heart Attack Prevention Center in Nashville, Tennessee.
What is Dr. Alfred Samuel Callahan III's office phone number?
The practice phone on file for Dr. Callahan is (615) 297-5300.
What is Dr. Alfred Samuel Callahan III's medical license number?
Dr. Callahan holds Tennessee license MD009933.
Which hospitals is Dr. Alfred Samuel Callahan III affiliated with?
Dr. Callahan is affiliated with Vanderbilt University Medical Center.
Does Dr. Alfred Samuel Callahan III accept Medicare?
Yes. CMS data shows Dr. Callahan billed Medicare for 1,376 services in 2024, and Dr. Callahan accepts Medicare assignment.
What is Dr. Alfred Samuel Callahan III's MIPS score?
Dr. Callahan's MIPS final score for performance year 2024 is 0 out of 100, reported individually.
How many Medicare patients does Dr. Alfred Samuel Callahan III see?
CMS counts 648 Medicare patients who saw Dr. Callahan in 2024, with an average age of 74.
What services does Dr. Alfred Samuel Callahan III bill to Medicare?
In 2024, Dr. Callahan's most billed Medicare services were blood vessel study (93880), office visit, established patient (99213) and office visit, new patient (99204).
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Where did Dr. Alfred Samuel Callahan III go to medical school?
Dr. Callahan graduated from Vanderbilt University School of Medicine in 1975.
What drugs does Dr. Alfred Samuel Callahan III prescribe most?
In 2024 Medicare Part D data, Dr. Callahan's most prescribed drugs by claims were Primidone, Atorvastatin Calcium and Ezetimibe.
Has Dr. Alfred Samuel Callahan III received payments from drug or device companies?
CMS Open Payments shows $115,422 in general payments to Dr. Callahan from 4 companies from 2016 to 2022. The largest total came from Pfizer Inc.
How long has Dr. Alfred Samuel Callahan III been practicing?
Dr. Callahan graduated from medical school in 1975, 51 years ago.
Does Dr. Alfred Samuel Callahan III do research?
Dmand AI links 6 publications to Dr. Callahan, published from 2011 to 2020.
Who does Dr. Alfred Samuel Callahan III publish with?
Dr. Callahan's most frequent co-authors are Larry Bruce Goldstein, MD (5 shared papers), Vito Campese, MD (1 shared paper) and Keith B. Churchwell, MD (1 shared paper).
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