Dr. Keith J. Kowalczyk

Krishnan Venkatesan is an Urologist in Baltimore, Maryland. Dr. Venkatesan is rated as a Distinguished provider by MediFind in the treatment of Urethral Stricture. His top areas of expertise are Urethral Stricture, Bladder Outlet Obstruction, Neurogenic Bladder, Reconstructive Urology Surgery, and Ureteroscopy. Dr. Venkatesan is currently accepting new patients.

Dr. Andrew J. Cohen is an Associate Professor of Urology at Johns Hopkins. He serves as the Division Director of Benign Urology and Director of Advanced Practice Providers at the Johns Hopkins Brady Urological Institute. He has a robust clinical practice focusing on complex genitourinary reconstruction. In particular, he has interest in the management of erectile dysfunction, urinary incontinence, stricture diseases of the urinary system, peyronie's disease, genital skin conditions, buried penis, urinary diversion, and other benign urologic conditions. He has extensive experience in robotic surgery. He also focuses on issues pertinent to cancer survivorship in men. He is well equipped to perform novel minimally invasive procedures such as endoscopic urethroplasty and robotic buccal ureteroplasty. He has an extensive research portfolio, with particular concentration in outcomes and safety research. Dr. Cohen received dual B.S. degrees summa cum laude from the University of Florida in Chemistry and Chemical Engineering, followed by an MD from the University of Chicago where he was inducted into the Alpha Omega Alpha Honor Society. His urologic training was pursued at the University of Chicago. Furthermore, he completed a fellowship in Genitourinary Reconstruction and Trauma at the University of California, San Francisco. Among many honors, he was invited to join the Trauma and Urologic Reconstructive Network of Surgeons in 2025. He was a also a recipient of the 'Rising Star' Award from the Society of Genitouinary Reconstructive Surgeons in 2025. Dr. Cohen is rated as a Distinguished provider by MediFind in the treatment of Urethral Stricture. His top areas of expertise are Urethral Stricture, Hydronephrosis, Obstructive Uropathy, Prostatectomy, and Lithotripsy.

Jeremy Tonkin is an Urologist in Washington, Washington, D.c.. Dr. Tonkin is rated as an Advanced provider by MediFind in the treatment of Urethral Stricture. His top areas of expertise are Urethral Stricture, Urinary Incontinence, Enlarged Prostate (BPH), Ureteroscopy, and Reconstructive Urology Surgery.