Dr. Jacquelyn Callahan, MD
- Medicare services, 2024
- 625
- Medicare patients, 2024
- 366
- Part D claims, 2024
- 118
- Publications
- 1
- Hospital affiliations
- 1
- Practice address
- 201 Seton Pkwy, Round Rock, TX 78665
- Practice phone
- Call (512) 324-4000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Ascension Seton Williamson
Round Rock, Texas
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. Jacquelyn Callahan is an emergency medicine physician in Round Rock, Texas
Dr. Callahan practices at Ascension Seton Williamson in Round Rock, Texas.
Dr. Callahan's NPI, 1396373213, was assigned on March 27, 2020. Dr. Callahan graduated from Dell Medical School in 2020. Dr. Callahan holds Texas license T6848.
- NPI
- 1396373213NPI Registry (opens in a new tab)
- NPI enumeration date
- March 27, 2020
- NPI status
- Active
- Practice phone
- (512) 324-4000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 32
- Medical school graduation
- 2020
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Jacquelyn Callahan practices at Ascension Seton Williamson in Round Rock, Texas
Dr. Callahan's primary practice is Ascension Seton Williamson, at 201 Seton Pkwy, Round Rock, TX 78665 in Williamson County. The practice phone is (512) 324-4000.
- Ascension Seton Williamson201 Seton Pkwy, Round Rock, TX 78665 · Williamson CountyPhone(512) 324-4000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Jacquelyn Callahan is affiliated with 2 sites of care and 5 medical groups
Dr. Callahan's primary practice is Ascension Seton Williamson in Round Rock, Texas. Dr. Callahan is also affiliated with CHRISTUS Spohn Hospital Corpus Christi - Shoreline. The medical group on file is Concord Medical Group. Dmand AI also links Dr. Callahan to 4 more medical groups, 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. Jacquelyn Callahan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Callahan practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Ascension Seton Williamson | Available with a free account |
| +1 more site and 4 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Jacquelyn Callahan is one of 4,831 emergency medicine physicians in Texas
Emergency medicine is Dr. Callahan's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Callahan is board certified in emergency medicine by the American Board of Emergency Medicine. Dr. Callahan is licensed in Texas.
Specialties and state licenses
- Emergency medicine, TexasPrimary
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. Jacquelyn Callahan billed Medicare for 625 services in 2024
CMS data shows 625 Medicare services from Dr. Callahan across 4 procedure codes in 2024, for 366 Medicare patients. Medicare paid $48,795 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: 1812024: 376108%
- Tests and treatments
- 2023: 1122024: 249122%
Dr. Callahan compared with the Texas median for emergency medicine physicians, 2024
- Dr. Callahan
- Texas median
- Medicare services
- 625vs 2252.8 times
- Medicare patients
- 366vs 20678% above
- Part D claims
- 17vs 7477% below
Medians across 4,588 emergency medicine physicians in Texas 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 Texas.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Jacquelyn Callahan treated 366 Medicare patients in 2024, average age 75
CMS counts 366 Medicare patients who saw Dr. Callahan in 2024. The largest group is 65 to 74, with 127 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 15% are also on Medicaid. Their average risk score is 2.05, 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 69, with 65% women.
Dr. Callahan's Medicare patients by age, 2024
Dr. Callahan's Medicare patients by sex, 2024
- Women19553%
- Men17147%
Chronic conditions among Dr. Callahan's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis55%
- Mood disorders46%
- Depression42%
- Diabetes42%
- Anxiety41%
- Ischemic heart disease39%
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 69
Patient panel by sex, all payers
- Women65%
- Men35%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Jacquelyn Callahan wrote 118 Medicare Part D claims in 2024
In 2024, Dr. Callahan wrote 118 Medicare Part D claims for 92 patients. 88% of them were for generic drugs. CMS names the drug for 17 of them, across 1 drug with 11 or more claims each, at $90 in total drug cost.
Dr. Callahan's Part D claims by kind of drug, 2024
- Generic104 claims88%
- Brand-name and other14 claims12%
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
- Antibiotics49%58 of 118 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
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
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Dr. Jacquelyn Callahan has 1 publication on record
Dmand AI links 1 paper to Dr. Callahan in 2023. Dr. Callahan's most frequent co-author is Peter B. Richman, MD.
Dr. Callahan's most frequent co-authors
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 emergency medicine physicians.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Jacquelyn Callahan received $40 in industry payments in 2024
CMS Open Payments shows 1 general payment to Dr. Callahan from 1 drug or device company in 2024. Education make up the largest share, 100% of the total. CSL Behring paid the most, $40.
Companies that paid Dr. Callahan the most, 2024 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Jacquelyn Callahan graduated from Dell Medical School
Dr. Callahan graduated from Dell Medical School in 2020.
- Medical school
- Board certified in emergency medicine
Source: Dmand AI Professional Profile Data
Dr. Jacquelyn Callahan accepts plans from 18 insurance carriers
Dr. Callahan is in network with 18 carriers, including Blue Cross Blue Shield of Michigan, United Healthcare and Elevance. HMO plans come from the most carriers, 10. Check the plan with the practice before a visit.
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Elevance
- Aetna
- Alliant Health Plans
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Molina
- +10 more carriersWith a free account
Plan types Dr. Callahan accepts, by number of carriers
- HMO10
- PPO10
- Medicare5
- POS4
- EPO3
Source: Dmand AI Insurance Network Data
Sources for Dr. Jacquelyn 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) |
| 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 |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. Jacquelyn 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. Jacquelyn Callahan's NPI number?
Dr. Jacquelyn Callahan's NPI number is 1396373213. It was assigned on March 27, 2020, and it is active in the NPI Registry.
What kind of doctor is Dr. Jacquelyn Callahan?
Dr. Jacquelyn Callahan is an emergency medicine physician in Round Rock, Texas. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Jacquelyn Callahan practice?
Dr. Callahan practices at 201 Seton Pkwy, Round Rock, TX 78665. Dr. Callahan's primary practice is Ascension Seton Williamson in Round Rock, Texas. Dmand AI also links Dr. Callahan to 4 medical groups.
What is Dr. Jacquelyn Callahan's office phone number?
The practice phone on file for Dr. Callahan is (512) 324-4000.
What is Dr. Jacquelyn Callahan's medical license number?
Dr. Callahan holds Texas license T6848.
Which hospitals is Dr. Jacquelyn Callahan affiliated with?
Dr. Callahan is affiliated with CHRISTUS Spohn Hospital Corpus Christi - Shoreline.
What medical group is Dr. Jacquelyn Callahan part of?
Dr. Callahan is linked to Concord Medical Group. Dmand AI links Dr. Callahan to 4 more medical groups.
Does Dr. Jacquelyn Callahan accept Medicare?
Yes. CMS data shows Dr. Callahan billed Medicare for 625 services in 2024.
How many Medicare patients does Dr. Jacquelyn Callahan see?
CMS counts 366 Medicare patients who saw Dr. Callahan in 2024, with an average age of 75.
Is Dr. Jacquelyn Callahan board certified?
Yes. Dr. Callahan is board certified in emergency medicine by the American Board of Emergency Medicine.
Show 8 more questionsShow fewer questions
What services does Dr. Jacquelyn Callahan bill to Medicare?
In 2024, Dr. Callahan's most billed Medicare services were emergency department visit (99285), heart test or procedure (93010) and emergency department visit (99284).
Where did Dr. Jacquelyn Callahan go to medical school?
Dr. Callahan graduated from Dell Medical School in 2020.
What drugs does Dr. Jacquelyn Callahan prescribe most?
In 2024 Medicare Part D data, Dr. Callahan's most prescribed drugs by claims were Amoxicillin-Clavulanate Potass.
Has Dr. Jacquelyn Callahan received payments from drug or device companies?
CMS Open Payments shows $40 in general payments to Dr. Callahan from 1 company from 2024 to 2024. The largest total came from CSL Behring.
How long has Dr. Jacquelyn Callahan been practicing?
Dr. Callahan graduated from medical school in 2020, 6 years ago.
Does Dr. Jacquelyn Callahan do research?
Dmand AI links 1 publication to Dr. Callahan.
Who does Dr. Jacquelyn Callahan publish with?
Dr. Callahan's most frequent co-authors are Peter B. Richman, MD (1 shared paper).
What insurance does Dr. Jacquelyn Callahan accept?
Dr. Callahan is in network with 18 carriers, including Blue Cross Blue Shield of Michigan, United Healthcare and Elevance. HMO plans come from the most carriers, 10. Check the plan with the practice before a visit.
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