Dr. Kathryn Ansell Brennan, MD
- Medicare services, 2023
- 34
- Part D claims, 2024
- 84
- Hospital affiliations
- 1
- Medical group
- 1
- State license
- 1
- Practice address
- 100 Sentara Circle, Williamsburg, VA 23188
- Practice phone
- Call (757) 984-7409
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Sentara Williamsburg Regional - Unit
Acute Care Hospital-Unit · Williamsburg, Virginia
Find Dr. Brennan'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. Kathryn Ansell Brennan is an internist in Williamsburg, Virginia
Dr. Brennan practices at Sentara Williamsburg Regional - Unit in Williamsburg, Virginia.
Dr. Brennan's NPI, 1588009351, was assigned on May 7, 2013. Dr. Brennan graduated from Emory University School of Medicine in 2013. Dr. Brennan holds Virginia license 0101264860.
- NPI
- 1588009351NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6204171952
- NPI enumeration date
- May 7, 2013
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (757) 984-7409
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 39
- Medical school graduation
- 2013
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Kathryn Ansell Brennan practices at Sentara Williamsburg Regional - Unit in Williamsburg, Virginia
Dr. Brennan's primary practice is Sentara Williamsburg Regional - Unit, at 100 Sentara Circle, Williamsburg, VA 23188 in James City. The practice phone is (757) 984-7409.
- Sentara Williamsburg Regional - Unit100 Sentara Circle, Williamsburg, VA 23188 · James CityPhone(757) 984-7409
Source: Dmand AI Affiliation Data
Dr. Kathryn Ansell Brennan is affiliated with 6 sites of care and 1 medical group
Dr. Brennan's primary practice is Sentara Williamsburg Regional - Unit in Williamsburg, Virginia. The medical group on file is HarmonyCares Medical Group. Dmand AI also links Dr. Brennan to 3 more home health agencies, 1 group practice or clinic and 1 hospice, each named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Kathryn Ansell Brennan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Brennan practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Sentara Williamsburg Regional - Unit | Available with a free account |
| +5 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Kathryn Ansell Brennan is one of 3,339 internists in Virginia
Internal medicine is Dr. Brennan's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Brennan is licensed in Virginia.
Specialties and state licenses
- Internal medicine, VirginiaPrimary
Internists near Dr. Brennan
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. Kathryn Ansell Brennan billed Medicare for 34 services in 2023
CMS data shows 34 Medicare services from Dr. Brennan across 2 procedure codes in 2023. Medicare paid $2,779 for them. Every service was in an office.
Dr. Brennan's Medicare services by type, 2022 to 2023
- 2022
- 2023
- Office and hospital visits
- 2022: 2992023: 1994%
- Other services
- 2022: 772023: 1581%
Dr. Brennan compared with the Virginia median for internists, 2023
- Dr. Brennan
- Virginia median
- Medicare services
- 34vs 60794% below
- Part D claims
- 68vs 22470% below
Medians across 3,182 internists in Virginia with Dmand AI profiles that report each measure.
Dr. Brennan's most billed Medicare procedure codes, 2023
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. Brennan and other internists in Virginia.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Kathryn Ansell Brennan's patients have a median age of 76
Across all payers, Dmand AI patient panel data puts Dr. Brennan's median patient age at 76, with 67% women.
Dr. Brennan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 76
Patient panel by sex, all payers
- Women67%
- Men31%
Source: Dmand AI Patient Panel Data
Dr. Kathryn Ansell Brennan wrote 84 Medicare Part D claims in 2024
In 2024, Dr. Brennan wrote 84 Medicare Part D claims. 100% of them were for generic drugs. CMS names the drug for 68 of them, across 5 drugs with 11 or more claims each, at $1,321 in total drug cost. In 2023, CMS named 263 claims across 13 drugs.
Dr. Brennan'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: 2632024: 6874%
Drugs named by CMS: 5 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. Kathryn Ansell Brennan offers telehealth to Medicare patients
Dr. Brennan accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Brennan as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Kathryn Ansell Brennan graduated from Emory University School of Medicine
Dr. Brennan graduated from Emory University School of Medicine in 2013.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Kathryn Ansell Brennan'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 Data |
| 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. Kathryn Ansell Brennan
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. Kathryn Ansell Brennan's NPI number?
Dr. Kathryn Ansell Brennan's NPI number is 1588009351. It was assigned on May 7, 2013, and it is active in the NPI Registry.
What kind of doctor is Dr. Kathryn Ansell Brennan?
Dr. Kathryn Ansell Brennan is an internist in Williamsburg, Virginia. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Kathryn Ansell Brennan practice?
Dr. Brennan practices at 100 Sentara Circle, Williamsburg, VA 23188. Dr. Brennan's primary practice is Sentara Williamsburg Regional - Unit in Williamsburg, Virginia. Dmand AI also links Dr. Brennan to 3 home health agencies, 1 group practice or clinic and 1 hospice.
What is Dr. Kathryn Ansell Brennan's office phone number?
The practice phone on file for Dr. Brennan is (757) 984-7409.
What is Dr. Kathryn Ansell Brennan's medical license number?
Dr. Brennan holds Virginia license 0101264860.
What medical group is Dr. Kathryn Ansell Brennan part of?
Dr. Brennan is linked to HarmonyCares Medical Group.
Does Dr. Kathryn Ansell Brennan accept Medicare?
Yes. CMS data shows Dr. Brennan billed Medicare for 34 services in 2023, and Dr. Brennan accepts Medicare assignment.
Does Dr. Kathryn Ansell Brennan offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Brennan as offering telehealth services.
What services does Dr. Kathryn Ansell Brennan bill to Medicare?
In 2023, Dr. Brennan's most billed Medicare services were home visit (99350) and medicare service (G0179).
Where did Dr. Kathryn Ansell Brennan go to medical school?
Dr. Brennan graduated from Emory University School of Medicine in 2013.
What drugs does Dr. Kathryn Ansell Brennan prescribe most?
In 2024 Medicare Part D data, Dr. Brennan's most prescribed drugs by claims were Amlodipine Besylate, Atorvastatin Calcium and Citalopram HBr.
How long has Dr. Kathryn Ansell Brennan been practicing?
Dr. Brennan graduated from medical school in 2013, 13 years ago.
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