Willimantic Center – Planned Parenthood Willimantic Planned Parenthood Abortionist William P. GuinanPhone 860-423-8426 Procedures Surgery: NO Medication: YES Other Info No abortions. Dec 2015. Address 1548 W Main Street, Willimantic, CT 06226 Documents License Restrictions PP of Southern New England -- Planned Parenthood licenses list License for Planned Parenthood in Willimantic, CT, valid through 9-30-2018. See page 12. Willimantic Center Planned Parenthood -- Connecticut clinic license file Owned by PP of Southern New England.