Wellington > Private Hospitals & Specialists >
Dr John Wyeth - Gastroenterologist
Private Service, Gastroenterology
Today
8:30 AM to 5:00 PM.
Description
Dr Wyeth has particular interest in:
- Complex GI cases
- Coeliac disease
- Endoscopy (Gastro)
- Upper GI (Gastro)
- Hydrogen breath tests
- IBD
- Lower GI (Gastro)
- Oesophageal manometry
- Colonoscopy
- Paediatric endoscopy
Consultants
-
Dr John Wyeth
Gastroenterologist
Ages
Youth / Rangatahi, Adult / Pakeke, Older adult / Kaumātua
How do I access this service?
Referral
Contact us
Patient direct referral is welcome.
Fees and Charges Categorisation
Fees apply
Fees and Charges Description
Southern Cross Affiliated Provider for consultations and nib Health Partner.
Hours
8:30 AM to 5:00 PM.
| Mon – Fri | 8:30 AM – 5:00 PM |
|---|
Languages Spoken
English
Services Provided
There are two types of IBD, ulcerative colitis and Crohn’s disease. In these conditions, the immune system attacks the lining of the colon causing inflammation and ulceration, bleeding and diarrhoea. In ulcerative colitis this only involves the large intestine, whereas in Crohn’s disease areas within the entire intestine can be involved. Both diseases are chronic (long term) with symptoms coming (relapse) and going (remission) over a number of years. Symptoms depend on what part of the intestine is involved but include: abdominal pain diarrhoea with bleeding tiredness fevers infections around the anus (bottom) weight loss can occur if the condition has been present for some time. Diagnosis is made when the symptoms, examination and blood tests suggest inflammatory bowel disease, infection is ruled out, and you undergo a colonoscopy with biopsy. Treatment depends on the severity of the symptoms and what part of the intestine is affected. Medication is aimed at suppressing the immune system, which is harming the lining of the bowel. This is done via oral or intravenous medication as well as medication given as an enema (via the bottom). Other treatments include changes in the diet to optimise nutrition and health. Treatment in some cases requires surgery to remove affected parts of the bowel.
There are two types of IBD, ulcerative colitis and Crohn’s disease. In these conditions, the immune system attacks the lining of the colon causing inflammation and ulceration, bleeding and diarrhoea. In ulcerative colitis this only involves the large intestine, whereas in Crohn’s disease areas within the entire intestine can be involved. Both diseases are chronic (long term) with symptoms coming (relapse) and going (remission) over a number of years. Symptoms depend on what part of the intestine is involved but include: abdominal pain diarrhoea with bleeding tiredness fevers infections around the anus (bottom) weight loss can occur if the condition has been present for some time. Diagnosis is made when the symptoms, examination and blood tests suggest inflammatory bowel disease, infection is ruled out, and you undergo a colonoscopy with biopsy. Treatment depends on the severity of the symptoms and what part of the intestine is affected. Medication is aimed at suppressing the immune system, which is harming the lining of the bowel. This is done via oral or intravenous medication as well as medication given as an enema (via the bottom). Other treatments include changes in the diet to optimise nutrition and health. Treatment in some cases requires surgery to remove affected parts of the bowel.
There are two types of IBD, ulcerative colitis and Crohn’s disease. In these conditions, the immune system attacks the lining of the colon causing inflammation and ulceration, bleeding and diarrhoea. In ulcerative colitis this only involves the large intestine, whereas in Crohn’s disease areas within the entire intestine can be involved. Both diseases are chronic (long term) with symptoms coming (relapse) and going (remission) over a number of years.
Symptoms depend on what part of the intestine is involved but include:
- abdominal pain
- diarrhoea with bleeding
- tiredness
- fevers
- infections around the anus (bottom)
- weight loss can occur if the condition has been present for some time.
Diagnosis is made when the symptoms, examination and blood tests suggest inflammatory bowel disease, infection is ruled out, and you undergo a colonoscopy with biopsy.
Treatment depends on the severity of the symptoms and what part of the intestine is affected. Medication is aimed at suppressing the immune system, which is harming the lining of the bowel. This is done via oral or intravenous medication as well as medication given as an enema (via the bottom). Other treatments include changes in the diet to optimise nutrition and health. Treatment in some cases requires surgery to remove affected parts of the bowel.
IBS is a common condition that affects how the stomach and bowels work. People with IBS might get stomach pain, feel bloated, and have problems like diarrhoea (runny poo), constipation (hard poo), or both. Read more about irritable bowel syndrome (IBS) on the Healthify website.
IBS is a common condition that affects how the stomach and bowels work. People with IBS might get stomach pain, feel bloated, and have problems like diarrhoea (runny poo), constipation (hard poo), or both. Read more about irritable bowel syndrome (IBS) on the Healthify website.
IBS is a common condition that affects how the stomach and bowels work. People with IBS might get stomach pain, feel bloated, and have problems like diarrhoea (runny poo), constipation (hard poo), or both.
Read more about irritable bowel syndrome (IBS) on the Healthify website.
Gastroscopy allows examination of the upper part of your digestive tract i.e. oesophagus (food pipe), stomach and duodenum (top section of the small intestine), by passing a gastroscope (long, flexible tube with a camera on the end) through your mouth and down your digestive tract. Images from the camera are displayed on a television monitor. Sometimes a small tissue sample (biopsy) will need to be taken during the procedure for later examination at a laboratory. Gastroscopy may be used to diagnose peptic ulcers, tumours, gastritis etc. Complications from this procedure are very rare but can occur. They include: bleeding if a biopsy is performed; allergic reaction to the sedative or throat spray; perforation (tearing) of the stomach with the instrument (this is a serious but extremely rare complication). What to expect All endoscopic procedures are viewed as a surgical procedure and generally the same preparation will apply. You will not be able to eat or drink anything for 6 hours before your gastroscopy. When you are ready for the procedure, the back of your throat will be sprayed with anaesthetic. You will also be offered medication (a sedative) to make you go into a light sleep. This will be given by an injection into a vein in your arm or hand. The gastroscopy will take approximately 15 minutes, but you will probably sleep for another 30 minutes. You will spend some time in a recovery unit (probably 1-2 hours) to sleep off the sedative and to allow staff to monitor you (take blood pressure readings etc). Because you have been sedated (given medication to make you sleep) it is important that you arrange for someone else to drive you home. If biopsies are taken for examination, your GP will be sent the results within 2-3 weeks.
Gastroscopy allows examination of the upper part of your digestive tract i.e. oesophagus (food pipe), stomach and duodenum (top section of the small intestine), by passing a gastroscope (long, flexible tube with a camera on the end) through your mouth and down your digestive tract. Images from the camera are displayed on a television monitor. Sometimes a small tissue sample (biopsy) will need to be taken during the procedure for later examination at a laboratory. Gastroscopy may be used to diagnose peptic ulcers, tumours, gastritis etc. Complications from this procedure are very rare but can occur. They include: bleeding if a biopsy is performed; allergic reaction to the sedative or throat spray; perforation (tearing) of the stomach with the instrument (this is a serious but extremely rare complication). What to expect All endoscopic procedures are viewed as a surgical procedure and generally the same preparation will apply. You will not be able to eat or drink anything for 6 hours before your gastroscopy. When you are ready for the procedure, the back of your throat will be sprayed with anaesthetic. You will also be offered medication (a sedative) to make you go into a light sleep. This will be given by an injection into a vein in your arm or hand. The gastroscopy will take approximately 15 minutes, but you will probably sleep for another 30 minutes. You will spend some time in a recovery unit (probably 1-2 hours) to sleep off the sedative and to allow staff to monitor you (take blood pressure readings etc). Because you have been sedated (given medication to make you sleep) it is important that you arrange for someone else to drive you home. If biopsies are taken for examination, your GP will be sent the results within 2-3 weeks.
Gastroscopy allows examination of the upper part of your digestive tract i.e. oesophagus (food pipe), stomach and duodenum (top section of the small intestine), by passing a gastroscope (long, flexible tube with a camera on the end) through your mouth and down your digestive tract. Images from the camera are displayed on a television monitor. Sometimes a small tissue sample (biopsy) will need to be taken during the procedure for later examination at a laboratory.
Gastroscopy may be used to diagnose peptic ulcers, tumours, gastritis etc.
Complications from this procedure are very rare but can occur. They include: bleeding if a biopsy is performed; allergic reaction to the sedative or throat spray; perforation (tearing) of the stomach with the instrument (this is a serious but extremely rare complication).
What to expect
All endoscopic procedures are viewed as a surgical procedure and generally the same preparation will apply. You will not be able to eat or drink anything for 6 hours before your gastroscopy. When you are ready for the procedure, the back of your throat will be sprayed with anaesthetic. You will also be offered medication (a sedative) to make you go into a light sleep. This will be given by an injection into a vein in your arm or hand.
The gastroscopy will take approximately 15 minutes, but you will probably sleep for another 30 minutes. You will spend some time in a recovery unit (probably 1-2 hours) to sleep off the sedative and to allow staff to monitor you (take blood pressure readings etc). Because you have been sedated (given medication to make you sleep) it is important that you arrange for someone else to drive you home.
If biopsies are taken for examination, your GP will be sent the results within 2-3 weeks.
Colonoscopy is the examination of your colon (large bowel) using a colonoscope (long, flexible tube with a camera on the end). The colonoscope is passed into your rectum (bottom) and then moved slowly along the entire colon, while images from the camera are displayed on a television monitor. The procedure takes from 10 minutes to an hour. Sometimes a small tissue sample (biopsy) will need to be taken during the procedure for later examination at a laboratory. A colonoscopy may help diagnose conditions such as polyps (small growths of tissue projecting into the bowel), tumours, ulcerative colitis (inflammation of the colon) and diverticulitis (inflammation of sacs that form on the walls of the colon). Colonoscopy may also be used to remove polyps in the colon. Risks of a colonoscopy are rare but include: bleeding if a biopsy is performed; allergic reaction to the sedative; perforation (tearing) of the bowel wall. What to expect It is important that the bowel is completely empty before the procedure takes place. This means that you will only be able to have liquids on the day before, and will probably have to take some oral laxative medication (to make you go to the toilet more). When you are ready for the procedure, you will be given medication (a sedative) to make you go into a light sleep. This will be given by an injection into a vein in your arm or hand. The colonoscopy will usually take 15 – 30 minutes, but you will probably sleep for another 30 minutes. Because you have been sedated (given medication to make you sleep) it is important that you arrange for someone else to drive you home. Some patients may experience discomfort after the procedure, due to air remaining in the colon.
Colonoscopy is the examination of your colon (large bowel) using a colonoscope (long, flexible tube with a camera on the end). The colonoscope is passed into your rectum (bottom) and then moved slowly along the entire colon, while images from the camera are displayed on a television monitor. The procedure takes from 10 minutes to an hour. Sometimes a small tissue sample (biopsy) will need to be taken during the procedure for later examination at a laboratory. A colonoscopy may help diagnose conditions such as polyps (small growths of tissue projecting into the bowel), tumours, ulcerative colitis (inflammation of the colon) and diverticulitis (inflammation of sacs that form on the walls of the colon). Colonoscopy may also be used to remove polyps in the colon. Risks of a colonoscopy are rare but include: bleeding if a biopsy is performed; allergic reaction to the sedative; perforation (tearing) of the bowel wall. What to expect It is important that the bowel is completely empty before the procedure takes place. This means that you will only be able to have liquids on the day before, and will probably have to take some oral laxative medication (to make you go to the toilet more). When you are ready for the procedure, you will be given medication (a sedative) to make you go into a light sleep. This will be given by an injection into a vein in your arm or hand. The colonoscopy will usually take 15 – 30 minutes, but you will probably sleep for another 30 minutes. Because you have been sedated (given medication to make you sleep) it is important that you arrange for someone else to drive you home. Some patients may experience discomfort after the procedure, due to air remaining in the colon.
Colonoscopy is the examination of your colon (large bowel) using a colonoscope (long, flexible tube with a camera on the end). The colonoscope is passed into your rectum (bottom) and then moved slowly along the entire colon, while images from the camera are displayed on a television monitor.
The procedure takes from 10 minutes to an hour. Sometimes a small tissue sample (biopsy) will need to be taken during the procedure for later examination at a laboratory.
A colonoscopy may help diagnose conditions such as polyps (small growths of tissue projecting into the bowel), tumours, ulcerative colitis (inflammation of the colon) and diverticulitis (inflammation of sacs that form on the walls of the colon).
Colonoscopy may also be used to remove polyps in the colon.
Risks of a colonoscopy are rare but include: bleeding if a biopsy is performed; allergic reaction to the sedative; perforation (tearing) of the bowel wall.
What to expect
It is important that the bowel is completely empty before the procedure takes place. This means that you will only be able to have liquids on the day before, and will probably have to take some oral laxative medication (to make you go to the toilet more).
When you are ready for the procedure, you will be given medication (a sedative) to make you go into a light sleep. This will be given by an injection into a vein in your arm or hand.
The colonoscopy will usually take 15 – 30 minutes, but you will probably sleep for another 30 minutes. Because you have been sedated (given medication to make you sleep) it is important that you arrange for someone else to drive you home.
Some patients may experience discomfort after the procedure, due to air remaining in the colon.
GORD is caused by the backflow (reflux) of food and stomach acid into the oesophagus (the tube that connects the mouth to the stomach) from the stomach. This happens when the valve between the stomach and the lower end of the oesophagus is not working properly. The main symptom of GORD is heartburn (a burning feeling in the stomach and chest). Read more about GORD on the Healthify website
GORD is caused by the backflow (reflux) of food and stomach acid into the oesophagus (the tube that connects the mouth to the stomach) from the stomach. This happens when the valve between the stomach and the lower end of the oesophagus is not working properly. The main symptom of GORD is heartburn (a burning feeling in the stomach and chest). Read more about GORD on the Healthify website
GORD is caused by the backflow (reflux) of food and stomach acid into the oesophagus (the tube that connects the mouth to the stomach) from the stomach. This happens when the valve between the stomach and the lower end of the oesophagus is not working properly. The main symptom of GORD is heartburn (a burning feeling in the stomach and chest).
Read more about GORD on the Healthify website
A range of medications such as iron, bisphosphonates (for bone conditions) and biologic treatments are delivered by intravenous infusion (given by injection into a vein through a drip).
A range of medications such as iron, bisphosphonates (for bone conditions) and biologic treatments are delivered by intravenous infusion (given by injection into a vein through a drip).
A range of medications such as iron, bisphosphonates (for bone conditions) and biologic treatments are delivered by intravenous infusion (given by injection into a vein through a drip).
A group of procedures used to assess how well the oesophagus (the muscular tube that connects the throat to the stomach) is working. These tests help diagnose conditions such as reflux or swallowing disorders. Common oesophageal tests include: Oesophageal manometry: measures the muscle contractions in the oesophagus. BRAVO pH testing: measures the acidity (pH) in the oesophagus. Oesophageal pH impedance study: measures acid levels in the oesophagus over 24 hours.
A group of procedures used to assess how well the oesophagus (the muscular tube that connects the throat to the stomach) is working. These tests help diagnose conditions such as reflux or swallowing disorders. Common oesophageal tests include: Oesophageal manometry: measures the muscle contractions in the oesophagus. BRAVO pH testing: measures the acidity (pH) in the oesophagus. Oesophageal pH impedance study: measures acid levels in the oesophagus over 24 hours.
A group of procedures used to assess how well the oesophagus (the muscular tube that connects the throat to the stomach) is working. These tests help diagnose conditions such as reflux or swallowing disorders.
Common oesophageal tests include:
- Oesophageal manometry: measures the muscle contractions in the oesophagus.
- BRAVO pH testing: measures the acidity (pH) in the oesophagus.
- Oesophageal pH impedance study: measures acid levels in the oesophagus over 24 hours.
Coeliac disease is a condition caused by an allergy to gluten, a protein found in foods containing wheat, barley or rye. When someone with coeliac disease eats gluten, it damages the lining of their small intestine, making it harder for their body to absorb nutrients properly. This can cause symptoms like stomach pain, tiredness, diarrhoea, or skin rashes. The main treatment is following a strict gluten-free diet.
Coeliac disease is a condition caused by an allergy to gluten, a protein found in foods containing wheat, barley or rye. When someone with coeliac disease eats gluten, it damages the lining of their small intestine, making it harder for their body to absorb nutrients properly. This can cause symptoms like stomach pain, tiredness, diarrhoea, or skin rashes. The main treatment is following a strict gluten-free diet.
Coeliac disease is a condition caused by an allergy to gluten, a protein found in foods containing wheat, barley or rye. When someone with coeliac disease eats gluten, it damages the lining of their small intestine, making it harder for their body to absorb nutrients properly. This can cause symptoms like stomach pain, tiredness, diarrhoea, or skin rashes. The main treatment is following a strict gluten-free diet.
Breath testing is a simple, non-invasive way to check for problems in the digestive system. After drinking a special liquid, a patient breathes into a bag or machine at different times. The test measures gases like hydrogen or methane in the breath, which are made by bacteria in the gut. It helps doctors diagnose conditions like small intestinal bacterial overgrowth (SIBO), lactose intolerance, or how well the body digests certain sugars.
Breath testing is a simple, non-invasive way to check for problems in the digestive system. After drinking a special liquid, a patient breathes into a bag or machine at different times. The test measures gases like hydrogen or methane in the breath, which are made by bacteria in the gut. It helps doctors diagnose conditions like small intestinal bacterial overgrowth (SIBO), lactose intolerance, or how well the body digests certain sugars.
Breath testing is a simple, non-invasive way to check for problems in the digestive system. After drinking a special liquid, a patient breathes into a bag or machine at different times. The test measures gases like hydrogen or methane in the breath, which are made by bacteria in the gut. It helps doctors diagnose conditions like small intestinal bacterial overgrowth (SIBO), lactose intolerance, or how well the body digests certain sugars.
Disability Assistance
Wheelchair access, Wheelchair accessible toilet, Mobility parking space
Parking
Ample free patient parking is available.
Pharmacy
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Contact Details
8:30 AM to 5:00 PM.
-
Phone
(04) 479 8261
Healthlink EDI
evohcare
Email
Website
Bowen Specialist Centre, Level B2, 98 Churchill Drive
Crofton Downs
Wellington
Wellington 6035
Street Address
Bowen Specialist Centre, Level B2, 98 Churchill Drive
Crofton Downs
Wellington
Wellington 6035
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This page was last updated at 9:54AM on March 30, 2026. This information is reviewed and edited by Dr John Wyeth - Gastroenterologist.

