Provider

Our Provider’s



Helen Ahn, M.D., F.A.C.S.

Dr. Ahn, received enrolled in the Honors Program in Medical Education in 1991 at Northwestern University. She received her B. A. in Biology from Northwestern University in 1994. She obtained her Medical Doctorate in 1994 from Northwestern University Medical School. She completed two years of general surgery training at Loyola University Medical Center, completing her urologic training in 2004.

Dr. Ahn’s professional interests include kidney stones, urinary incontinence, voiding dysfunction, urinary tract infections. She is an active member of the American Urological Association and a Fellow of the American College of Surgeons.



Phuong N. Huynh, M.D., M.P.H.

Dr. Huynh received his undergraduate degree from Northwestern University in 1994. In 1995 he completed his Master’s Degree in Public Health at the University of Illinois in Chicago. Dr. Huynh became a graduate of Rush Medical College in 1999 where he became a member of the Alpha Omega Alpha Honors Society. He completed his urologic surgery residency training in 2005 at William Beaumont Hospital in Royal Oak, Michigan.

Dr. Huynh’s professional interests include urologic cancer, stone disease and robotic surgery. He is an active member of the American urological Association.



James C. Kim, M.D., F.A.C.S.

Dr. Kim received his education at the University of Michigan and Wayne State University School of Medicine. He graduated with honors and is a member of the Alpha Omega Alpha Honors Society. Dr. Kim completed his Urology residency at the University of Chicago Hospital.

Dr. Kim’s professional interests include general urology, oncology, prostate cancer, BPH, and stone disease. He has surgical interests in minimally invasive surgery, laser and robotic surgery. Dr. Kim is a Fellow of the American College of Surgeons.



Michael L. Paik, M.D., F.A.C.S.

Dr. Paik received his undergraduate degree at the University of Michigan and his M.D. at Northwestern University Feinberg School of Medicine. He completed his urology residency at Case Western Reserve University in Cleveland, OH.

Dr. Paik’s professional interests include general urology, urologic oncology, prostate cancer, BPH, and stone disease. He has special surgical interests in minimally invasive surgery, laser and robotic surgery. Dr. Paik is an active member of the American Urological Association and a Fellow of the American College of Surgeons.



Daniel H. Piazza, M.D.
Dr. Piazza is a board certified urologist. Dr. Piazza received his undergraduate degree from Stanford University and his M.D. from the University of Illinois. He completed his internship and residencies at Rush-Presbyterian-St. Luke’s Medical Center, Loyola University Medical Center and the University of Michigan Medical Center. Prior to joining NUA, he served as a Major in the U.S. Army Medical Corp. His special interests in urology include the treatment of impotence, infertility, genitourinary prosthetics, urodynamics and neurogenic bladder, calculus disease and endourology.

Our PA’s



Andrea Schrage
Andrea Schrage is originally from Reno, NV. She received her undergraduate degree in chemistry at Grinnell College in Iowa in 2008. She graduated in 2010 from Kansas State University with a Master’s Degree in Public Health while completing research in nutrition. Andrea completed her Physician Assistant training at Midwestern University in Downers Grove in 2014. She is board-certified by the NCCPA and is an active member of the AAPA. She loves spending time with her family and reading a good book.


Rebecca Wiener
Rebecca Wiener is a board Certified Physician Assistant, certified by the National Commission on Certification of Physician Assistants (NCCPA), and licensed by the state of Illinois to practice and prescribe medicine. She graduated from Indiana University Bloomington with a B.S. in Nutrition Science and received her Masters degree in Physician Assistant Studies from Concordia University of Wisconsin. She is also a member of the American Academy of Physician Assistants (AAPA). Originally from Milwaukee, WI, Rebecca enjoys spending time with her family, practicing yoga, and playing tennis.