Mercyhealth Gynecologist now seeing patients in Crystal Lake

News Release
Contact: Therese Michels
FOR IMMEDIATE RELEASE Media Specialist
(815) 971-5421

June 13, 2026

Mercyhealth gynecologist now seeing patients in Crystal Lake

CRYSTAL LAKE, Illinois—William Leach, Jr., DO, FACOG, board certified gynecologist, is now
seeing patients at Mercyhealth Hospital and Physician Clinic–Crystal Lake, 875 S. Route 31, Crystal
Lake.
Dr. Leach encourages patients to participate in their care decisions. “The interaction I prefer to have
with patients is that of negotiation, instead of lecture,” he said. “I want patients to communicate with
me what it is they want, and what they prefer. I then educate my patients about the medical problem
they are experiencing, and together we can assemble a plan for their care that we both agree on. I strive
to use the best available medical evidence and the most up-to-date tools and techniques in order to
provide my patients with the best possible outcomes.”
After earning his medical degree at the Philadelphia College of Osteopathic Medicine, Dr. Leach
served his residency at Aurora Sinai Medical Center–University of Wisconsin Medical
School/Milwaukee Clinical Campus. He is certified by the American Board of Obstetrics and
Gynecology and is a Fellow of the American College of Obstetricians and Gynecologists (FACOG).
Dr. Leach’s special interests include:
 Gynecology
 Comprehensive evaluation and management for pelvic pain and endometriosis
 Fibroid treatment
 Menopause and hormone replacement therapy
 Pelvic floor prolapse and incontinence treatment
 Minimally invasive gynecologic surgery
To make an appointment with Dr. Leach at Mercyhealth Hospital and Physician Clinic–Crystal Lake,
call (815) 356-7494.