Brennan Joins Mercy Clinic in Oklahoma City

January 29, 2015

OKLAHOMA CITY – At age 10, Dr. Cynthia Brennan knew she wanted to be a doctor so she could help people while fulfilling her “Christian duty to serve.” 

Brennan brings that willingness to serve others to her newest role as a long-term care provider at Mercy Clinic in Oklahoma City.

“I believe patients have the right to make the decisions affecting their health care and living situation,” said Brennan. “My role is to provide the information they need to make appropriate decisions. This means making an accurate assessment of their medical situation, spending time listening to the patient, answering their questions and teaching.”

Brennan is originally from Omaha, Nebraska, and received her medical degree from Creighton University in Omaha. She completed her family medicine residency through the University of Oklahoma/Garfield County Family Medicine Program in Enid, Oklahoma. In 2011, she also earned her master’s degree in business administration focused on health care management from Regis University in Denver, Colorado.

After her residency, Brennan worked for more than seven years for the Indian Health Service in Anadarko, Oklahoma, and then worked for about 15 years in a private practice in Bullhead City, Arizona. She and her husband then moved back to Oklahoma where she worked as a hospitalist for about six years before joining Mercy.

In her spare time, Brennan enjoys knitting, embroidery, baking, astronomy, genealogy and reading books about military history. She also teaches high school science through a home school group.


Mercy is the fifth largest Catholic health care system in the U.S. and serves millions annually. Mercy includes 34 acute care hospitals, four heart hospitals, two children’s hospitals, three rehab hospitals and two orthopedic hospitals, nearly 700 clinic and outpatient facilities, 40,000 co-workers and more than 2,000 Mercy Clinic physicians in Arkansas, Kansas, Missouri and Oklahoma. Mercy also has outreach ministries in Louisiana, Mississippi and Texas. 

Media Contacts

Meredith Huggins
El Reno, Guthrie, Kingfisher, Oklahoma City, Watanga
Phone: 405-936-5766