Meet The Team
Northland Surgical Endoscopy has grown to include 5 surgeons. We provide a wide range of expertise and services.


Mark Sanders
Colorectal and General Surgeon
Areas of Expertise: General surgery, Colorectal surgery, laparoscopic or open gallbladder surgery, thyroid and parathyroid surgery, laparoscopic or open hernia repairs, colonoscopy and gastroscopy.
Phone: 09 4373738
EDI: sandleng
Email: tracy@northlandendoscopy.co.nz
Consulting Times: Thursday mornings & the first Wednesday of each month
Operating Times: Thursday afternoon, alternate Wednesdays and Friday morning

Sean Liddle
Upper Gastrointestinal Bariatric & General Surgeon
Areas of Expertise: General surgery, anti-reflux surgery, other forms of laparoscopic upper gastrointestinal surgery, bariatric surgery, gallbladder surgery, laparoscopic or open hernia repairs, and gastroscopy.
Phone: 09 4373872
EDI: northhwt
Email: info@northlandhw.co.nz
Consulting Times: Wednesday afternoon
Operating Times: Thursday

Mallory Collecutt
Speech-Language Therapist | Specialist in Adult & Geriatric Communication and Swallowing
Areas of Expertise: Tui Speech Therapy is a Whangārei-based private practice led by Mallory Collecutt, M.S., CCC-SLP, a certified and experienced speech-language therapist specialising in adult and geriatric care. I offer assessment and treatment for adults (16+) with communication, cognitive-communication, voice, swallowing, aphasia, and motor speech disorders. For more information (pricing, inservice training, Telehealth) or referral details HERE
Phone: 027 407 6972
Email: tuispeechtherapy@gmail.com

Jessica De Wit
NZ Registered Dietitian and Dietitian Prescriber.
Areas of Expertise: Bariatric surgery nutrition, weight management, gastrointestinal concerns (including IBS, IBD, gallbladder, and hernia surgery), metabolic conditions such as pre-diabetes and type 2 diabetes, and lifestyle change (intuitive eating and very low-calorie diets).
Phone: 021581099
Email: jessica@advancednutrition.co.nz
Appointments: Tuesday evenings and Fridays

Will Anderson
Breast, Skin and General Surgeon
Areas of Expertise: General surgery, breast surgery and breast disease, melanoma and non-melanoma skin surgery, gall bladder surgery, open and laparoscopic hernia surgery and gastroscopy.
Phone: 09 430 2388 EDI: surgwill Email: info@willandersonsc.co.nz
Consulting Times: Wednesday morning
Operating Times: Tuesday afternoon

Elad Dagan
Otolaryngology, Head and neck surgery
Ear nose and throat
Areas of Expertise: General ENT, Salivary gland minimally invasive surgery and Sialendoscopy, Thyroid and Parathyroid surgery, Head and Neck surgery, Paediatric surgery, Nasal and Sinus disease, Laryngology and swallowing.
Phone: 09 4374143
EDI: sandleng
Email: entnorth@northlandendoscopy.co.nz
Consulting Times: Monday 9-2pm
Operating Times: Friday


John Lengyel
Colorectal and General Surgeon
Areas of Expertise: Colorectal surgery, laparoscopic or open gallbladder surgery, laparoscopic or open hernia repairs, colonoscopy and gastroscopy
Phone: 09 4374144
EDI: sandleng
Email: jlreception@northlandendoscopy.co.nz
Consulting Times: Tuesday and Friday mornings
Operating Times: Monday afternoon, Tuesday afternoon




