Meet Our Team

Gynecologic Oncology doctors
Michael Callahan

Michael Callahan, MD

Dr. Callahan graduated from DePauw University in Greencastle, Ind., where he played varsity football and earned Academic All-American honors. He graduated from Indiana University School of Medicine as a member of the Alpha Omega Alpha Honor Medical Society. Dr. Callahan trained in obstetrics and gynecology at St.Vincent Hospital Indianapolis and completed a fellowship in gynecologic oncology at Brigham and Women’s Hospital/Harvard Medical School in Boston where he was recognized for research achievement by the New England Association of Gynecologic Oncologists. Dr. Callahan practices the full spectrum of gynecologic oncology, with special interests in gestational trophoblastic diseases, hereditary predisposition to gynecologic cancer, and the surgical and chemotherapeutic management of early and advanced uterine, cervical, vulvar, and ovarian cancers, including intraperitoneal chemotherapy.

Hubert Fornalik

Hubert Fornalik, MD

Dr. Fornalik graduated from the Medical University of Warsaw, Poland. He completed his obstetrics and gynecology residency at Albert Einstein Medical Center in Philadelphia where he received an award for special excellence in laparoscopic procedures. Dr. Fornalik received his gynecologic oncology education at Fox Chase Cancer Center in Philadelphia, Penn. and Stanford University School of Medicine in Palo Alto, Calif., followed by a three-year fellowship at the University of Iowa Hospitals and Clinics. Dr. Fornalik’s research focuses on the molecular and clinical aspects of endometrial cancer, with special emphasis on minimally invasive treatment. He provides the full scope of gynecologic oncology surgeries and chemotherapies with special expertise in robotic surgery, its application for obese patients, and intraperitoneal chemotherapy for ovarian cancer.

Georgiann Linnemeier

Georgiann Linnemeier, MD

Dr. Linnemeier received her medical degree at Indiana University Medical School. She completed her internship and residency in internal medicine at St.Vincent Indianapolis Hospital. She has several years of experience caring for patients in gynecologic oncology, with a special interest in patients undergoing chemotherapy. She has received research funding for cervical cancer educational programs and is conducting basic science research on the early diagnosis of ovarian cancer.

Nicole Flanders

Nicole Flanders, PA-C

Nicole Flanders earned her Bachelor of Science degree in biology from the University of Kentucky and completed physician assistant studies at Midwestern University in Chicago. She began her career at Marshfield Clinic in Marshfield, Wis. She joined St.Vincent Hospital in 2005 and St.Vincent Gynecologic Oncology in 2007. She is an active member of the American Academy of Physician Assistants and a member of the St.Vincent Advanced Practice Provider committee.

Laura Long

Laura Long, PA-C

Laura Long earned her Bachelor of Science degree in biology from Indiana University and completed physician assistant studies at Butler University. She has previous experience in general surgery and emergency medicine, and joined the St.Vincent Gynecologic Oncology practice in 2011. She is a member of the American Academy of Physician Assistants and the Indiana Academy of Physician Assistants.

Nurses and Clinical Assistants


From left, Jaime Weimer, RN, BSN, OCN; Christi Crimmins, RN, BSN; Cheryl Johnson, clinical assistant; Amber Cornman, RN, BSN; Sylvia Arriaza, clinical assistant; Tracy Thorley, RN, BSN, OCN

Clinical Trials


From left, Sue Rivers, RN, BSN, OCN; Cynthia Hernandez, CCRP; Shirley Morrison, CCRP; Rachele Willett, RN, BSN