Cara O'BrienM.D.
Geriatric Medicine·Milwaukee, WI
Cara O'Brien, M.D. is a Geriatric Medicine provider in Milwaukee, WI, as of July 2026.
- NPI1720407893
- Registered2014
- Class of2014
Case volumes, referral patterns, and payer mix live in DataLily AI Insights.
Education
Education on record as of August 2026.
Cara O'Brien at a glance
- Provider
- Cara O'Brien
- Credential
- M.D.
- Specialty
- Geriatric Medicine
- Location
- Milwaukee, WI
- Medical school
- University of Illinois College of Med (chi/peor/rock/chm-Urb)
- Graduated
- 2014
- NPI registered
- 2014
- NPI
- 1720407893
- Snapshot
- July 2026
Identity, specialty, and affiliations change over time. This is not an endorsement, and not clinical, billing, or legal advice. Providers may request corrections at founders@datalilyai.com. Read the DataLily AI data methodology.
Questions
Where does Cara O'Brien practice?
Cara O'Brien, M.D. is based in Milwaukee, WI. Affiliations reflect the current DataLily AI snapshot (July 2026) and can change.
What is Cara O'Brien's NPI number?
Cara O'Brien's National Provider Identifier (NPI) is 1720407893, registered in 2014. Specialty on record: Geriatric Medicine; credential M.D.
Where did Cara O'Brien go to medical school?
Cara O'Brien, M.D. attended University of Illinois College of Med (chi/peor/rock/chm-Urb), graduating in 2014.
How many Geriatric Medicine providers in Wisconsin work at ambulatory surgery centers?
14 Geriatric Medicine surgeons and proceduralists in Wisconsin are affiliated with ambulatory surgery centers in DataLily AI's current snapshot, Cara O'Brien among them. The Wisconsin Geriatric Medicine directory lists each one by city with credential, NPI, and center affiliations.
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