Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. Ciara Catherine O'Sullivan, MD

Individual provider Medical Oncology Physician · NPI 1427495357

Dr. Ciara Catherine O'Sullivan, MD is a Medical Oncology in Rochester, Minnesota. Qualified in 2005, 21 years ago. Practices with Mayo Clinic, a 4,796-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in District of Columbia and Minnesota.

Years since qualifying
21
Licensed in
DC, MN
In the registry since
2013
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

200 1st St SW
Rochester, MN 55905-0001
Phone: (507) 284-2511
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 555 Massachusetts Ave Nw, Washington, DC 20001-4717 — (202) 403-7992

Specialties & licences

Medical Oncology Physician (primary) Taxonomy 207RX0202X · Licence 60300 (MN)
Medical Oncology Physician Taxonomy 207RX0202X · Licence MTR000235 (DC)

Record details

NPI number1427495357
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 1, 2013
Last updated in NPPESAugust 19, 2020
Certification dateAugust 19, 2020

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyMEDICAL ONCOLOGY
Medical schoolOTHER
Graduated 2005 (21 years in practice)
Group practice Mayo Clinic — 4796 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

Other providers in Rochester