If you are a patient and need to speak with our clinical staff regarding an urgent problem, please call 978-927-4800 and press 3. If you have a non-urgent question. Please send us a message through Lahey My Chart. If you are not enrolled in My Chart, call 978-927-4800 and press 2 to leave a message. ... Essex County OB/GYN 978-927-4800 ....