Dr. Irina Fox Brennan, MD, PhD
- Medicare services, 2024
- 446
- Medicare patients, 2024
- 282
- Part D claims, 2024
- 213
- Hospital affiliations
- 1
- Industry payments
- $520
- Practice address
- 4320 Seminary Rd, Alexandria, VA 22304
- Practice phone
- Call (703) 504-3167
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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. Irina Fox Brennan is an emergency medicine physician in Alexandria, Virginia
Dr. Brennan practices at Inova Alexandria Hospital in Alexandria, Virginia, part of Inova Health Care Services.
Dr. Brennan's NPI, 1053605584, was assigned on June 1, 2011. Dr. Brennan holds Virginia license 0101260407.
- NPI
- 1053605584NPI Registry (opens in a new tab)
- NPI enumeration date
- June 1, 2011
- NPI status
- Active
- Practice phone
- (703) 504-3167
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Irina Fox Brennan practices at Inova Alexandria Hospital in Alexandria, Virginia
Dr. Brennan's primary practice is Inova Alexandria Hospital, at 4320 Seminary Rd, Alexandria, VA 22304 in Alexandria City. The practice phone is (703) 504-3167.
- Inova Alexandria Hospital4320 Seminary Rd, Alexandria, VA 22304 · Alexandria CityPhone(703) 504-3167
Source: Dmand AI Affiliation Data
Dr. Irina Fox Brennan is affiliated with 1 site of care and 2 medical groups
Dr. Brennan's primary practice is Inova Alexandria Hospital in Alexandria, Virginia, part of Inova Health Care Services. The medical group on file is Emergency Medicine Physicians (EMP). Dmand AI also links Dr. Brennan to 1 more medical group, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Irina Fox Brennan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Brennan practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Inova Alexandria Hospital | Available with a free account |
| +1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Irina Fox Brennan is one of 1,686 emergency medicine physicians in Virginia
Emergency medicine is Dr. Brennan's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dmand AI has Dr. Brennan's licenses on file in 2 states: Virginia and Florida.
Specialties and state licenses
- Emergency medicine, VirginiaPrimary
- Florida license
Emergency medicine physicians near Dr. Brennan
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. Irina Fox Brennan billed Medicare for 446 services in 2024
CMS data shows 446 Medicare services from Dr. Brennan across 4 procedure codes in 2024, for 282 Medicare patients. Medicare paid $58,839 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Brennan's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3862024: 44616%
Dr. Brennan compared with the Virginia median for emergency medicine physicians, 2024
- Dr. Brennan
- Virginia median
- Medicare services
- 446vs 31143% above
- Medicare patients
- 282vs 3078% below
- Part D claims
- 94vs 5959% above
Medians across 1,632 emergency medicine physicians in Virginia with Dmand AI profiles that report each measure.
Dr. Brennan'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. Irina Fox Brennan treated 282 Medicare patients in 2024, average age 74
CMS counts 282 Medicare patients who saw Dr. Brennan in 2024. The largest group is 75 to 84, with 94 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 27% 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. Brennan's median patient age at 39, with 55% women.
Dr. Brennan's Medicare patients by age, 2024
Dr. Brennan's Medicare patients by sex, 2024
- Women15555%
- Men12745%
Chronic conditions among Dr. Brennan's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis54%
- Ischemic heart disease45%
- Chronic kidney disease40%
- Diabetes40%
- Anxiety33%
- Heart failure32%
Share of Medicare patients with each condition. A patient can have several.
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 39
Patient panel by sex, all payers
- Women55%
- Men44%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Irina Fox Brennan wrote 213 Medicare Part D claims in 2024
In 2024, Dr. Brennan wrote 213 Medicare Part D claims for 114 patients. 91% of them were for generic drugs. CMS names the drug for 94 of them, across 6 drugs with 11 or more claims each, at $919 in total drug cost. In 2023, CMS named 65 claims across 5 drugs.
Dr. Brennan's Part D claims by kind of drug, 2024
- Generic194 claims91%
- Brand-name and other19 claims9%
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.
Drug classes CMS tracks in Dr. Brennan's Part D claims, 2024
- Opioids10%22 of 213 claims
- Antibiotics34%73 of 213 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: 652024: 9445%
Drugs named by CMS: 6 in 2024, 5 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
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Dr. Irina Fox Brennan received $520 in industry payments from 2018 to 2025
CMS Open Payments shows 2 general payments to Dr. Brennan from 2 drug and device companies from 2018 to 2025. Honoraria make up the largest share, 96% of the total. Purdue Pharma L.P. paid the most, $500.
General payments to Dr. Brennan by program year, 2018 to 2025
General payments to Dr. Brennan by kind, 2018 to 2025
- Honoraria$50096%
- Food and beverage$204%
Companies that paid Dr. Brennan the most, 2018 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Irina Fox 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 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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Irina Fox 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. Irina Fox Brennan's NPI number?
Dr. Irina Fox Brennan's NPI number is 1053605584. It was assigned on June 1, 2011, and it is active in the NPI Registry.
What kind of doctor is Dr. Irina Fox Brennan?
Dr. Irina Fox Brennan is an emergency medicine physician in Alexandria, Virginia. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Irina Fox Brennan practice?
Dr. Brennan practices at 4320 Seminary Rd, Alexandria, VA 22304. Dr. Brennan's primary practice is Inova Alexandria Hospital in Alexandria, Virginia, part of Inova Health Care Services. Dmand AI also links Dr. Brennan to 1 medical group.
What is Dr. Irina Fox Brennan's office phone number?
The practice phone on file for Dr. Brennan is (703) 504-3167.
What is Dr. Irina Fox Brennan's medical license number?
Dr. Brennan holds Virginia license 0101260407, one of the licenses on file in 2 states.
Which states has Dr. Irina Fox Brennan been licensed in?
Dmand AI has state licenses on file for Dr. Brennan in Virginia and Florida.
Which hospitals is Dr. Irina Fox Brennan affiliated with?
Dr. Brennan practices at Inova Alexandria Hospital in Alexandria, Virginia.
What medical group is Dr. Irina Fox Brennan part of?
Dr. Brennan is linked to Emergency Medicine Physicians (EMP). Dmand AI links Dr. Brennan to 1 more medical group.
Does Dr. Irina Fox Brennan accept Medicare?
Yes. CMS data shows Dr. Brennan billed Medicare for 446 services in 2024.
How many Medicare patients does Dr. Irina Fox Brennan see?
CMS counts 282 Medicare patients who saw Dr. Brennan in 2024, with an average age of 74.
Show 4 more questionsShow fewer questions
What services does Dr. Irina Fox Brennan bill to Medicare?
In 2024, Dr. Brennan's most billed Medicare services were critical care (99291), critical care (99292) and emergency department visit (99284).
What drugs does Dr. Irina Fox Brennan prescribe most?
In 2024 Medicare Part D data, Dr. Brennan's most prescribed drugs by claims were Ondansetron ODT, Cefdinir and Azithromycin.
Has Dr. Irina Fox Brennan received payments from drug or device companies?
CMS Open Payments shows $520 in general payments to Dr. Brennan from 2 companies from 2018 to 2025. The largest total came from Purdue Pharma L.P.
How long has Dr. Irina Fox Brennan been practicing?
Dr. Brennan's NPI was assigned in 2011.
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