Private Gastroenterologist in London & Essex
Expert digestive care with a personal touch. Fast access to investigations, consultant-led treatment, and clinics in both London and Essex.
Meet Dr Leena Sinha
I’m a private consultant gastroenterologist in London and Essex, with over 20 years of experience diagnosing and treating a wide range of gut and liver conditions. I take a calm, thoughtful, and thorough approach — so you can get clarity, comfort, and the care you deserve.
Private Gastroenterologist in London & Essex
Expert digestive care with a personal touch. Fast access to investigations, consultant-led treatment, and clinics in both London and Essex.
Meet Dr Leena Sinha
I’m a private consultant gastroenterologist in London and Essex, with over 20 years of experience diagnosing and treating a wide range of gut and liver conditions. I take a calm, thoughtful, and thorough approach — so you can get clarity, comfort, and the care you deserve.
Common conditions I treat
Common conditions I treat
Investigations Offered
Consultations
What to Expect from Your Private Gastroenterology Consultation
At your private consultation with Dr Leena Sinha, Consultant Gastroenterologist in London and Essex, you’ll receive expert, personalised care in a calm, professional environment.
Whether you’re experiencing digestive discomfort, ongoing bloating, acid reflux, IBS symptoms, or unexplained changes in your bowel habits, this initial consultation is the first step in understanding your condition and getting the right treatment.
A Tailored, Expert-Led Approach
Your consultation will include:
-
A thorough review of your symptoms and medical history
-
Discussion of any lifestyle or dietary factors that may be affecting your gut health
-
Physical examination, if needed
-
Advice on next steps, such as blood tests, imaging, gastroscopy, colonoscopy, or capsule endoscopy
-
A clear, personalised treatment plan, with time for all your questions
Dr Sinha’s holistic approach ensures that your concerns are listened to in full, and any recommended investigations or treatments are explained in plain, reassuring language.
Colonoscopy
A colonoscopy is a safe and effective procedure used to examine the large bowel (colon) and rectum. It helps identify the cause of bowel symptoms and can also detect early signs of conditions such as bowel cancer, inflammation, or polyps.
At Dr Leena Sinha’s private clinics in London and Essex, colonoscopies are carried out by experienced specialists in comfortable, well-equipped environments with a strong focus on patient care.
When is a Colonoscopy Recommended?
You may be advised to have a colonoscopy if you’re experiencing:
-
Persistent changes in bowel habits (diarrhoea, constipation, or both)
-
Rectal bleeding or blood in your stool
-
Abdominal pain, bloating, or unexplained weight loss
-
Iron deficiency anaemia or low haemoglobin
-
A family history of bowel cancer or polyps
-
As part of a bowel cancer screening or surveillance programme (e.g., for inflammatory bowel disease)
What Happens During a Colonoscopy?
-
You will be given a laxative the day before the procedure to clear your bowel.
-
On the day, a sedative may be offered to help you feel relaxed and comfortable.
-
A thin, flexible camera called a colonoscope is gently passed into the rectum and guided through the colon.
-
The procedure usually takes 20–45 minutes.
-
If necessary, small tissue samples (biopsies) can be taken and polyps may be removed during the procedure.
After Your Colonoscopy
-
You will be monitored until you are fully awake and alert.
-
Most patients go home the same day – if sedated, you’ll need someone to accompany you and rest for the day.
-
Dr Sinha will discuss any findings with you, and biopsy results are typically available within a few days.
-
You will receive a clear, personalised treatment or follow-up plan based on your results.
Why Choose a Private Colonoscopy with Dr Leena Sinha?
-
Timely access to investigations and results
-
Consultant-led care from an experienced gastroenterologist
-
Procedures carried out in leading London and Essex hospitals
-
Access to sedation and supportive nursing care for your comfort
-
Integrated follow-up and treatment planning
Imaging
How Imaging Helps in Gastroenterology Investigations
In gastroenterology, medical imaging plays a vital role in diagnosing digestive disorders, guiding treatment decisions, and monitoring disease progression. From abdominal pain and bloating to liver abnormalities or unexplained weight loss, imaging allows your specialist to see inside your body and better understand the cause of your symptoms.
At Dr Leena Sinha’s private clinics in London and Essex, we use advanced imaging techniques alongside endoscopy and laboratory tests to provide comprehensive, accurate diagnoses in a timely manner.
Common Imaging Tests in Gastroenterology
1. Abdominal Ultrasound
A quick and painless scan that uses sound waves to create images of your internal organs. It’s often used to assess the liver, gallbladder, pancreas, spleen, and kidneys.
Useful for investigating:
-
Gallstones
-
Fatty liver disease
-
Liver enlargement or abnormal liver tests
-
Abdominal pain or bloating
2. CT Scan (Computed Tomography)
Provides detailed cross-sectional images of the abdomen and pelvis, helping detect inflammation, blockages, or tumours in the digestive tract.
Used to investigate:
-
Suspected cancer
-
Pancreatitis
-
Diverticulitis
-
Unexplained weight loss or anaemia
3. MRI Scan (Magnetic Resonance Imaging)
Offers high-resolution imaging without radiation. MRI is particularly valuable in evaluating the liver, biliary system, and small bowel, and is often used in patients with Crohn’s disease or liver abnormalities.
Specialist uses include:
-
MRCP (Magnetic Resonance Cholangiopancreatography) – to view bile ducts and pancreas
-
Small bowel MRI – to assess inflammation in Crohn’s disease
-
Liver scans to assess fibrosis, fat content, or cirrhosis
4. FibroScan® (Transient Elastography)
A non-invasive scan to measure liver stiffness and fat content, helping detect or monitor fatty liver disease, liver fibrosis, and cirrhosis without a biopsy.
5. Nuclear Medicine Scans
Occasionally used to evaluate gastric emptying, gastrointestinal bleeding, or bile reflux by tracking the movement of small amounts of radioactive tracers.
How Imaging Supports Your Diagnosis
Imaging is often used in combination with other tests such as:
-
Gastroscopy or colonoscopy
-
Capsule endoscopy
-
Blood tests
-
Stool analysis
Together, these investigations provide a complete picture of your gut health, helping Dr Sinha make an accurate diagnosis and develop a tailored treatment plan.
Gastroscopy
Gastroscopy is a simple and effective procedure used to investigate symptoms affecting the upper digestive system. It allows your gastroenterologist to closely examine your oesophagus (food pipe), stomach, and the first part of your small intestine (duodenum) using a thin, flexible camera called an endoscope.
At Dr Leena Sinha’s private clinics in London and Essex, gastroscopies are carried out with expert care, ensuring your comfort and safety at every step.
When is a Gastroscopy Recommended?
Dr Sinha may recommend a gastroscopy if you’re experiencing:
-
Persistent heartburn or acid reflux
-
Difficulty swallowing (dysphagia)
-
Unexplained nausea or vomiting
-
Stomach pain or bloating
-
Unexplained weight loss
-
Anaemia or signs of internal bleeding
-
To monitor or follow up on known conditions such as gastritis, Barrett’s oesophagus, or coeliac disease
What Happens During the Procedure?
-
You’ll be given a choice of sedation or local anaesthetic throat spray to keep you comfortable.
-
A thin tube with a camera (endoscope) is gently passed through the mouth to view the upper digestive tract.
-
The procedure typically takes 5–10 minutes.
-
If needed, small tissue samples (biopsies) can be taken during the procedure for further analysis – this is painless.
After Your Gastroscopy
-
If you’ve had sedation, you’ll need someone to accompany you home and rest for the day.
-
Dr Sinha will explain any findings before you leave or at your follow-up consultation.
-
Biopsy results are usually available within a few days, and a treatment plan will be tailored based on your results and overall symptoms.
Why Choose a Private Gastroscopy with Dr Leena Sinha?
-
Rapid access to appointments and diagnostic tests
-
Experienced consultant-led care at top hospitals across London and Essex
-
Options for sedation and enhanced comfort
-
Clear explanation of results and personalised aftercare
Capsule Endoscopy
Capsule endoscopy is a painless, non-invasive test that uses a swallowable camera capsule to take thousands of high-resolution images as it travels through your digestive tract. This advanced technology allows for detailed examination of the small bowel, colon, or entire gastrointestinal tract (pan-enteric) without the need for traditional scopes or sedation.
At Dr Leena Sinha’s private clinics in London and Essex, we offer all three forms of capsule endoscopy in a comfortable, consultant-led setting with rapid access to results and personalised follow-up care.
Types of Capsule Endoscopy
1. Small Bowel Capsule Endoscopy
This capsule investigates the middle portion of the gastrointestinal tract – the small intestine – which is difficult to reach with standard endoscopy or colonoscopy.
Common reasons for small bowel capsule include:
-
Unexplained iron deficiency anaemia
-
Investigation of occult gastrointestinal bleeding
-
Diagnosis or monitoring of Crohn’s disease
-
Evaluation of coeliac disease, small bowel tumours, or ulcers
2. Colon Capsule Endoscopy
A minimally invasive alternative to traditional colonoscopy for examining the large bowel.
Often recommended for:
-
Patients unable or unwilling to undergo colonoscopy
-
Bowel cancer screening
-
Follow-up of known or suspected polyps
-
Investigation of persistent changes in bowel habit or rectal bleeding
3. Pan-Enteric Capsule Endoscopy
This cutting-edge capsule visualises both the small and large intestine in a single procedure — ideal for comprehensive evaluation of the entire bowel.
Particularly useful for:
-
Diagnosing and monitoring Crohn’s disease
-
Assessing the extent and activity of inflammatory bowel disease (IBD)
-
Providing a full gastrointestinal map without invasive procedures
What to Expect
-
You’ll swallow a small, pill-sized capsule with a built-in camera.
-
For colon and pan-enteric capsules, a bowel preparation is required the day before to ensure clear visibility.
-
As the capsule travels through your digestive tract, it captures thousands of images and transmits them to a wearable device.
-
The capsule is painlessly passed in your stool within 1–2 days.
-
Dr Sinha will review the results and discuss your findings and any necessary treatment or further investigations.
Why Choose Capsule Endoscopy with Dr Leena Sinha?
-
Expert interpretation by a leading UK consultant gastroenterologist
-
Private capsule endoscopy services available in London and Essex
-
Fast access to appointments, testing, and reports
-
Non-invasive alternative to traditional endoscopy and colonoscopy
-
Ideal for patients seeking comfort, convenience, and expert-led care
Benefits of Capsule Endoscopy
-
No sedation or recovery time needed
-
No tubes or scopes inserted
-
Allows full visualisation of hard-to-reach areas
-
Excellent diagnostic tool for both subtle and complex bowel conditions
-
Highly suitable for patients with busy lifestyles or medical anxiety
Book a Capsule Endoscopy Assessment
If you’re experiencing symptoms such as anaemia, abdominal pain, changes in bowel habit, or you’re under investigation for Crohn’s disease, capsule endoscopy may be the right option for you.
GI Physiology
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Book a consultation today
If you are experiencing digestive symptoms and require expert evaluation, contact us today via our contact form, call 020 336 86975, or email drlsinha@theclinic.co.uk. We’ll guide you through the most appropriate investigations — including imaging and GI physiology — to help you get the answers and care you need.
Investigations Offered
Consultations
What to Expect from Your Private Gastroenterology Consultation
At your private consultation with Dr Leena Sinha, Consultant Gastroenterologist in London and Essex, you’ll receive expert, personalised care in a calm, professional environment.
Whether you’re experiencing digestive discomfort, ongoing bloating, acid reflux, IBS symptoms, or unexplained changes in your bowel habits, this initial consultation is the first step in understanding your condition and getting the right treatment.
A Tailored, Expert-Led Approach
Your consultation will include:
-
A thorough review of your symptoms and medical history
-
Discussion of any lifestyle or dietary factors that may be affecting your gut health
-
Physical examination, if needed
-
Advice on next steps, such as blood tests, imaging, gastroscopy, colonoscopy, or capsule endoscopy
-
A clear, personalised treatment plan, with time for all your questions
Dr Sinha’s holistic approach ensures that your concerns are listened to in full, and any recommended investigations or treatments are explained in plain, reassuring language.
Colonoscopy
A colonoscopy is a safe and effective procedure used to examine the large bowel (colon) and rectum. It helps identify the cause of bowel symptoms and can also detect early signs of conditions such as bowel cancer, inflammation, or polyps.
At Dr Leena Sinha’s private clinics in London and Essex, colonoscopies are carried out by experienced specialists in comfortable, well-equipped environments with a strong focus on patient care.
When is a Colonoscopy Recommended?
You may be advised to have a colonoscopy if you’re experiencing:
-
Persistent changes in bowel habits (diarrhoea, constipation, or both)
-
Rectal bleeding or blood in your stool
-
Abdominal pain, bloating, or unexplained weight loss
-
Iron deficiency anaemia or low haemoglobin
-
A family history of bowel cancer or polyps
-
As part of a bowel cancer screening or surveillance programme (e.g., for inflammatory bowel disease)
What Happens During a Colonoscopy?
-
You will be given a laxative the day before the procedure to clear your bowel.
-
On the day, a sedative may be offered to help you feel relaxed and comfortable.
-
A thin, flexible camera called a colonoscope is gently passed into the rectum and guided through the colon.
-
The procedure usually takes 20–45 minutes.
-
If necessary, small tissue samples (biopsies) can be taken and polyps may be removed during the procedure.
After Your Colonoscopy
-
You will be monitored until you are fully awake and alert.
-
Most patients go home the same day – if sedated, you’ll need someone to accompany you and rest for the day.
-
Dr Sinha will discuss any findings with you, and biopsy results are typically available within a few days.
-
You will receive a clear, personalised treatment or follow-up plan based on your results.
Why Choose a Private Colonoscopy with Dr Leena Sinha?
-
Timely access to investigations and results
-
Consultant-led care from an experienced gastroenterologist
-
Procedures carried out in leading London and Essex hospitals
-
Access to sedation and supportive nursing care for your comfort
-
Integrated follow-up and treatment planning
Imaging
How Imaging Helps in Gastroenterology Investigations
In gastroenterology, medical imaging plays a vital role in diagnosing digestive disorders, guiding treatment decisions, and monitoring disease progression. From abdominal pain and bloating to liver abnormalities or unexplained weight loss, imaging allows your specialist to see inside your body and better understand the cause of your symptoms.
At Dr Leena Sinha’s private clinics in London and Essex, we use advanced imaging techniques alongside endoscopy and laboratory tests to provide comprehensive, accurate diagnoses in a timely manner.
Common Imaging Tests in Gastroenterology
1. Abdominal Ultrasound
A quick and painless scan that uses sound waves to create images of your internal organs. It’s often used to assess the liver, gallbladder, pancreas, spleen, and kidneys.
Useful for investigating:
-
Gallstones
-
Fatty liver disease
-
Liver enlargement or abnormal liver tests
-
Abdominal pain or bloating
2. CT Scan (Computed Tomography)
Provides detailed cross-sectional images of the abdomen and pelvis, helping detect inflammation, blockages, or tumours in the digestive tract.
Used to investigate:
-
Suspected cancer
-
Pancreatitis
-
Diverticulitis
-
Unexplained weight loss or anaemia
3. MRI Scan (Magnetic Resonance Imaging)
Offers high-resolution imaging without radiation. MRI is particularly valuable in evaluating the liver, biliary system, and small bowel, and is often used in patients with Crohn’s disease or liver abnormalities.
Specialist uses include:
-
MRCP (Magnetic Resonance Cholangiopancreatography) – to view bile ducts and pancreas
-
Small bowel MRI – to assess inflammation in Crohn’s disease
-
Liver scans to assess fibrosis, fat content, or cirrhosis
4. FibroScan® (Transient Elastography)
A non-invasive scan to measure liver stiffness and fat content, helping detect or monitor fatty liver disease, liver fibrosis, and cirrhosis without a biopsy.
5. Nuclear Medicine Scans
Occasionally used to evaluate gastric emptying, gastrointestinal bleeding, or bile reflux by tracking the movement of small amounts of radioactive tracers.
How Imaging Supports Your Diagnosis
Imaging is often used in combination with other tests such as:
-
Gastroscopy or colonoscopy
-
Capsule endoscopy
-
Blood tests
-
Stool analysis
Together, these investigations provide a complete picture of your gut health, helping Dr Sinha make an accurate diagnosis and develop a tailored treatment plan.
Gastroscopy
Gastroscopy is a simple and effective procedure used to investigate symptoms affecting the upper digestive system. It allows your gastroenterologist to closely examine your oesophagus (food pipe), stomach, and the first part of your small intestine (duodenum) using a thin, flexible camera called an endoscope.
At Dr Leena Sinha’s private clinics in London and Essex, gastroscopies are carried out with expert care, ensuring your comfort and safety at every step.
When is a Gastroscopy Recommended?
Dr Sinha may recommend a gastroscopy if you’re experiencing:
-
Persistent heartburn or acid reflux
-
Difficulty swallowing (dysphagia)
-
Unexplained nausea or vomiting
-
Stomach pain or bloating
-
Unexplained weight loss
-
Anaemia or signs of internal bleeding
-
To monitor or follow up on known conditions such as gastritis, Barrett’s oesophagus, or coeliac disease
What Happens During the Procedure?
-
You’ll be given a choice of sedation or local anaesthetic throat spray to keep you comfortable.
-
A thin tube with a camera (endoscope) is gently passed through the mouth to view the upper digestive tract.
-
The procedure typically takes 5–10 minutes.
-
If needed, small tissue samples (biopsies) can be taken during the procedure for further analysis – this is painless.
After Your Gastroscopy
-
If you’ve had sedation, you’ll need someone to accompany you home and rest for the day.
-
Dr Sinha will explain any findings before you leave or at your follow-up consultation.
-
Biopsy results are usually available within a few days, and a treatment plan will be tailored based on your results and overall symptoms.
Why Choose a Private Gastroscopy with Dr Leena Sinha?
-
Rapid access to appointments and diagnostic tests
-
Experienced consultant-led care at top hospitals across London and Essex
-
Options for sedation and enhanced comfort
-
Clear explanation of results and personalised aftercare
Capsule Endoscopy
Capsule endoscopy is a painless, non-invasive test that uses a swallowable camera capsule to take thousands of high-resolution images as it travels through your digestive tract. This advanced technology allows for detailed examination of the small bowel, colon, or entire gastrointestinal tract (pan-enteric) without the need for traditional scopes or sedation.
At Dr Leena Sinha’s private clinics in London and Essex, we offer all three forms of capsule endoscopy in a comfortable, consultant-led setting with rapid access to results and personalised follow-up care.
Types of Capsule Endoscopy
1. Small Bowel Capsule Endoscopy
This capsule investigates the middle portion of the gastrointestinal tract – the small intestine – which is difficult to reach with standard endoscopy or colonoscopy.
Common reasons for small bowel capsule include:
-
Unexplained iron deficiency anaemia
-
Investigation of occult gastrointestinal bleeding
-
Diagnosis or monitoring of Crohn’s disease
-
Evaluation of coeliac disease, small bowel tumours, or ulcers
2. Colon Capsule Endoscopy
A minimally invasive alternative to traditional colonoscopy for examining the large bowel.
Often recommended for:
-
Patients unable or unwilling to undergo colonoscopy
-
Bowel cancer screening
-
Follow-up of known or suspected polyps
-
Investigation of persistent changes in bowel habit or rectal bleeding
3. Pan-Enteric Capsule Endoscopy
This cutting-edge capsule visualises both the small and large intestine in a single procedure — ideal for comprehensive evaluation of the entire bowel.
Particularly useful for:
-
Diagnosing and monitoring Crohn’s disease
-
Assessing the extent and activity of inflammatory bowel disease (IBD)
-
Providing a full gastrointestinal map without invasive procedures
What to Expect
-
You’ll swallow a small, pill-sized capsule with a built-in camera.
-
For colon and pan-enteric capsules, a bowel preparation is required the day before to ensure clear visibility.
-
As the capsule travels through your digestive tract, it captures thousands of images and transmits them to a wearable device.
-
The capsule is painlessly passed in your stool within 1–2 days.
-
Dr Sinha will review the results and discuss your findings and any necessary treatment or further investigations.
Why Choose Capsule Endoscopy with Dr Leena Sinha?
-
Expert interpretation by a leading UK consultant gastroenterologist
-
Private capsule endoscopy services available in London and Essex
-
Fast access to appointments, testing, and reports
-
Non-invasive alternative to traditional endoscopy and colonoscopy
-
Ideal for patients seeking comfort, convenience, and expert-led care
Benefits of Capsule Endoscopy
-
No sedation or recovery time needed
-
No tubes or scopes inserted
-
Allows full visualisation of hard-to-reach areas
-
Excellent diagnostic tool for both subtle and complex bowel conditions
-
Highly suitable for patients with busy lifestyles or medical anxiety
Book a Capsule Endoscopy Assessment
If you’re experiencing symptoms such as anaemia, abdominal pain, changes in bowel habit, or you’re under investigation for Crohn’s disease, capsule endoscopy may be the right option for you.
GI Physiology
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Book a consultation today
If you are experiencing digestive symptoms and require expert evaluation, contact us today via our contact form, call 020 336 86975, or email drlsinha@theclinic.co.uk. We’ll guide you through the most appropriate investigations — including imaging and GI physiology — to help you get the answers and care you need.
My Approach to Care
I believe great gut care starts with time, trust, and thoughtful treatment — not just tests. I listen carefully, explain clearly, and guide you every step of the way.
“No jargon, no rushed visits — just clear answers and expert care.”
Ready to get started?
If you’re looking for a private gastroenterologist in London or Essex who puts your health and comfort first, I’d be delighted to help.