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A Direct Look at What Is Happening in Your Upper Digestive Tract

Many gastrointestinal symptoms originate in the upper digestive tract—the esophagus, stomach, and beginning of the small intestine—where conditions including ulcers, inflammation, abnormal growths, acid reflux damage, and structural abnormalities can produce symptoms that range from persistent heartburn and difficulty swallowing to unexplained nausea, abdominal pain, and gastrointestinal bleeding. While laboratory testing and imaging can provide useful information about upper GI health, there is no substitute for direct visual examination when a thorough assessment of the upper gastrointestinal tract is clinically indicated.

Upper endoscopy provides exactly that. Under the care of Dr. Lynne B. Ahn, a board-certified gastroenterologist, endoscopy is performed with the clinical precision, specialist expertise, and genuine attention to patient comfort and experience that this important diagnostic and therapeutic procedure deserves. For patients whose symptoms or clinical picture call for direct assessment of the upper gastrointestinal tract, an endoscopy in Boston provides the most complete and clinically reliable information available.

man looking off into the distance

What Is an Endoscopy?

An upper endoscopy, also known as an esophagogastroduodenoscopy or EGD, is a diagnostic and therapeutic procedure in which a thin, flexible tube called an endoscope, equipped with a high-resolution camera and a light source, is gently guided through the mouth, down the throat, and into the esophagus, stomach, and beginning of the small intestine. The camera transmits real-time images to a monitor, allowing Dr. Ahn to directly visualize the lining of the upper gastrointestinal tract, identify abnormalities, assess the degree and extent of any pathology present, and perform therapeutic interventions, including tissue biopsy, where clinically indicated. The procedure is performed under mild sedation, ensuring that patients are comfortable and have no memory of the experience. It typically takes approximately 15 minutes from the start of the procedure, and patients recover in a monitored setting before being discharged home, requiring a companion for transportation, given the sedation involved.

The Benefits of Board-Certified Gastroenterologist-Performed Endoscopy

  • Direct Visual Assessment of the Upper GI Tract: Endoscopy provides the most direct and complete assessment of the upper gastrointestinal tract available, allowing Dr. Ahn to visualize the esophageal, gastric, and duodenal mucosa in real time and identify pathological changes that laboratory testing and imaging cannot detect.
  • Diagnosis of a Broad Range of Upper GI Conditions: Endoscopy enables the diagnosis of esophagitis, gastritis, peptic ulcer disease, Barrett's esophagus, celiac disease, gastrointestinal bleeding sources, abnormal growths, and other upper GI conditions with a level of clinical certainty that non-procedural evaluation cannot provide.
  • Tissue Biopsy for Definitive Diagnosis: When abnormal tissue is identified during endoscopy, biopsies can be taken for pathological analysis, providing the definitive histological diagnosis that guides appropriate treatment decisions for conditions including H. pylori infection, celiac disease, Barrett's esophagus, and suspected malignancy.
  • Therapeutic Intervention Capability: Beyond diagnosis, endoscopy enables therapeutic interventions, including the removal of polyps, treatment of bleeding lesions, dilation of strictures, and other procedures that can be performed at the time of diagnostic evaluation without requiring a separate procedure.
  • Specialist-Level Expertise and Precision: Endoscopy performed by a board-certified gastroenterologist brings the depth of training, procedural experience, and clinical judgment that accurate diagnosis and safe, effective performance of the procedure require, ensuring that findings are identified with thoroughness and that any therapeutic interventions are performed with precision.
  • Integration With Comprehensive Gut Health Evaluation: At Ahn Point Wellness, endoscopy findings are evaluated and interpreted in the context of each patient's full gut health picture, including microbiome testing, stool analysis, and the broader integrative assessment that Dr. Ahn develops for every patient, ensuring that structural findings are understood within the complete clinical context.
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Is an Endoscopy Right for Me?

Upper endoscopy is clinically indicated for patients experiencing persistent or severe symptoms of the upper gastrointestinal tract, including heartburn or acid reflux that has not responded to standard treatment, difficulty or pain with swallowing, persistent nausea or vomiting, unexplained abdominal pain, gastrointestinal bleeding including vomiting blood or passing black stools, unexplained weight loss, or symptoms suggesting the presence of a serious upper GI condition that requires direct assessment to investigate appropriately.

It is also indicated for patients who require surveillance of known upper GI conditions, including Barrett's esophagus, or for follow-up assessment of previously identified abnormalities. Before recommending an endoscopy in Wellesley, Dr. Ahn evaluates each patient's symptoms, health history, and clinical picture to determine whether the procedure is clinically indicated. She clearly explains the rationale for her recommendation before proceeding, ensuring that every procedure is performed for a specific, well-considered clinical reason.

The Endoscopy Process What to Expect

Clinical Consultation and Procedure Planning

Dr. Ahn reviews your symptoms, health history, current medications, and clinical picture to determine whether upper endoscopy is indicated, explains the procedure and what to expect, discusses the specific clinical questions the endoscopy is intended to answer, and addresses any questions or concerns you have before proceeding.

Pre-Procedure Preparation

Upper endoscopy requires fasting for a defined period before the procedure, typically four to six hours for liquids and longer for solid food, to ensure that the stomach is empty and the upper gastrointestinal tract can be clearly visualized. Dr. Ahn will provide specific preparation instructions, including any medication adjustments needed before the procedure.

Arrival and Pre-Procedure Assessment

On the day of the procedure, you will arrive at the endoscopy facility where the clinical team reviews your medical history, confirms your preparation, establishes intravenous access, and prepares you for the procedure in a calm and supportive environment.

Sedation and Procedure

Mild intravenous sedation is administered, ensuring that you are comfortable and relaxed during the procedure. Dr. Ahn gently guides the endoscope through the upper gastrointestinal tract, carefully examining the esophagus, stomach, and beginning of the small intestine, taking biopsies of any tissue requiring pathological assessment, and performing any therapeutic interventions indicated by the findings.

Recovery

Following the procedure, you will recover in a monitored setting until the effects of sedation have worn off sufficiently for safe discharge. A companion is required to accompany you home, given the sedation involved, and most patients return to normal activities the following day.

Results Review and Next Steps

Dr. Ahn reviews the findings of the endoscopy with you, explaining what was observed, the significance of any abnormalities identified, the results of any biopsies taken, and the recommended next steps based on the procedural findings.

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Conditions Evaluated and Diagnosed Through Endoscopy

  • Gastroesophageal Reflux Disease and Esophagitis: Endoscopy allows for direct assessment of esophageal mucosal damage caused by acid reflux, evaluating the presence and severity of esophagitis, identifying erosions and ulcerations, and assessing for complications of chronic reflux, including Barrett's esophagus and stricture formation.
  • Barrett's Esophagus: Barrett's esophagus is a condition in which the normal esophageal lining is replaced by intestinal-type epithelium in response to chronic acid exposure, carrying an elevated risk of esophageal adenocarcinoma. Endoscopy with biopsy is the definitive method for diagnosing and surveilling Barrett's esophagus, and regular endoscopic surveillance is an essential component of long-term management for patients with this condition.
  • Peptic Ulcer Disease: Endoscopy enables direct visualization and biopsy of gastric and duodenal ulcers, providing the diagnostic confirmation needed to guide treatment and assess for complications, including bleeding and H. pylori infection. Biopsies obtained during endoscopy can confirm H. pylori infection, the most common treatable cause of peptic ulcer disease.
  • Celiac Disease: The diagnosis of celiac disease requires duodenal biopsies obtained during upper endoscopy to assess for the characteristic mucosal changes of villous atrophy and crypt hyperplasia. Endoscopy with biopsy is the gold standard for celiac disease diagnosis and is indicated for patients with positive celiac serology or clinical presentations consistent with malabsorption.
  • Gastritis and Helicobacter Pylori: Endoscopy allows for direct assessment of gastric mucosal inflammation and biopsy-based testing for H. pylori infection, providing the most definitive evaluation of the gastric environment and its relationship to upper GI symptoms, including nausea, bloating, and epigastric pain.
  • Upper Gastrointestinal Bleeding: Endoscopy is the primary diagnostic and therapeutic tool for upper gastrointestinal bleeding, providing direct visualization of the bleeding source, assessment of its severity, and the capability to perform therapeutic interventions to achieve hemostasis at the time of diagnosis.
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Your Endoscopy Results

Endoscopy findings are reviewed with you by Dr. Ahn immediately following the procedure, providing an initial assessment of the visual findings while biopsy results are pending. Biopsy results are typically available within several days to two weeks, depending on the specific pathological analyses requested. Dr. Ahn reviews all biopsy findings with you directly, explaining the results clearly and discussing the recommended next steps based on the complete procedural findings.

For many patients, endoscopy provides the definitive structural assessment that resolves diagnostic uncertainty and establishes the clinical foundation for a targeted, effective treatment strategy. For those in whom endoscopy findings are normal, the negative structural assessment contributes meaningfully to the overall clinical picture. It guides the next steps in the comprehensive gut health evaluation conducted at Ahn Point Wellness.

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Why Choose Ahn Point Wellness?

Board-Certified Gastroenterologist Performing Every Procedure

At Ahn Point Wellness, every endoscopy in Boston is performed by Dr. Ahn, whose board certification in gastroenterology reflects the specialist training, procedural competency, and clinical judgment that endoscopy requires. Patients benefit from the expertise and thoroughness that a dedicated gastroenterologist brings to every procedure.

Thorough, Attentive Procedural Examination

Dr. Ahn approaches every endoscopy with the attention to detail and clinical thoroughness that meaningful diagnostic assessment requires, ensuring that the upper gastrointestinal tract is systematically and carefully examined and that findings are identified and documented with the completeness that guides accurate diagnosis and treatment.

Integration With Comprehensive Gut Health Evaluation

Endoscopy findings at Ahn Point Wellness are evaluated and interpreted in the context of each patient's full gut health picture, including microbiome testing, advanced stool analysis, and the broader integrative assessment that Dr. Ahn conducts for every patient, ensuring that structural findings are understood within the complete clinical context rather than in isolation.

A Supportive, Patient-Centered Procedural Experience

Care at Ahn Point Wellness is structured around attention to the patient experience at every step. From the pre-procedure consultation through the post-procedure review of findings, Dr. Ahn ensures that patients are fully informed, genuinely comfortable, and well-supported throughout every aspect of the endoscopy process.

Patient Testimonials

5 out of 5 stars

Dr. Lynne Ahn is one of the most compassionate, intelligent, and highly qualified physicians I know. Lynne has been an invaluable resource and an excellent guide across various ...

Dr. Lynne Ahn is one of the most compassionate, intelligent, and highly qualified physicians I know. Lynne has been an invaluable resource and an excellent guide across various aspects of medicine as my gastroenterologist and functional medicine physician. Her approach to care is second to none, and I am constantly amazed by her depth of knowledge and commitment to her patients’ well-being.

Carolina Mujica, DMD, CAGS
5 out of 5 stars

Dr. Ahn and her staff are amazing! I haven’t been feeling like myself over the past few years, and wasn’t getting answers from other doctor visits. I knew it was time to invest ...

Dr. Ahn and her staff are amazing! I haven’t been feeling like myself over the past few years, and wasn’t getting answers from other doctor visits. I knew it was time to invest in my health, so I did my research and found Ahn Point Wellness. Dr. Ahn’s approach to wellness is exactly what I wanted. She does a thorough and comprehensive series of tests in order to get a complete overview of your health. At the follow-up appointment, she spends time explaining the test results and walks you through options and recommendations that address your personal needs. It’s been a month since my follow-up, and I’m starting to feel like my old self again. I highly recommend Ahn Point Wellness!

Anonymous Patient
5 out of 5 stars

My evaluation appointment with Dr. Ahn was such a relief and a pleasant surprise compared to previous experiences with doctors. Most importantly, I felt listened to as a patient...

My evaluation appointment with Dr. Ahn was such a relief and a pleasant surprise compared to previous experiences with doctors. Most importantly, I felt listened to as a patient. I felt like she was really taking the time to do an extremely thorough and thoughtful exam, and I really appreciated her patience with questions and concerns.

Christy C.
5 out of 5 stars

Dr. Ahn is an unmatched, excellent gastroenterologist; she has a vast clinical experience and depth of knowledge, which fortifies her clinical ability. I am a retired physician ...

Dr. Ahn is an unmatched, excellent gastroenterologist; she has a vast clinical experience and depth of knowledge, which fortifies her clinical ability. I am a retired physician and, as such, highly endorse her ability in gastrointestinal disorders, as I found when she treated me. I am pleased to support her superb medical abilities.

Earle B. Weiss, MD
5 out of 5 stars

Thanks very much for discussing the path results and treatment plan with me. And thank you for your expertise in making efficient and unequivocal diagnoses of esophagitis and no...

Thanks very much for discussing the path results and treatment plan with me. And thank you for your expertise in making efficient and unequivocal diagnoses of esophagitis and non-celiac gluten sensitivity, issues which I can now address. I feel better physically now than at any point since my retirement 3 years ago, thanks to you!

KRK
5 out of 5 stars

I met with Dr. Ahn virtually in October of 2020 to discuss my experience with menopause and how to best protect my body in the future. I had thought about using hormone therapy,...

I met with Dr. Ahn virtually in October of 2020 to discuss my experience with menopause and how to best protect my body in the future. I had thought about using hormone therapy, but wasn’t quite sure it was for me. Dr. Ahn explained the many benefits of HRT not only to alleviate menopausal symptoms, but to preserve my brain, organs, and bones as I continue to age. She did extensive blood work to determine my hormone levels, micronutrients, and an in-depth review of my cholesterol. She then prescribed a combination of HRT and supplements to boost my health and well-being, while also taking into consideration my lifestyle and not wanting to wake up and take 20 pills every day! Dr. Ahn practices a unique approach to women’s health whereby she spends a lot of time understanding her patients, and then digs into the data to formulate a customized wellness routine that optimizes their health. Her vast knowledge of women’s health and her attention to patient needs are unmatched!

Kirsten H.
5 out of 5 stars

Conventional medicine with my PCC was not addressing any of my perimenopausal signs and symptoms, nor my fears for the next chapter of life. Dr. Ahn’s thorough, caring, and prof...

Conventional medicine with my PCC was not addressing any of my perimenopausal signs and symptoms, nor my fears for the next chapter of life. Dr. Ahn’s thorough, caring, and professional knowledge has proven remarkable results for me! Thank you, Dr. Ahn, for making such an impactful change in my life!

Thrilled Patient
5 out of 5 stars

I found Dr. Ahn when I was looking at available options for menopausal relief. First and foremost, she is kind, thoughtful, and willing to spend the time to find the right solut...

I found Dr. Ahn when I was looking at available options for menopausal relief. First and foremost, she is kind, thoughtful, and willing to spend the time to find the right solution for you. A huge bonus is that she is a gastroenterologist, especially when trying to find your best path to wellness. Bottom line: she is my favorite doctor and the one I go to first with any questions.

Anonymous Patient
5 out of 5 stars

I thought fatigue was just something that I would have to deal with, and I accepted it as “what happens when you get older.” I’m 47 and had lost my libido, and that was botherin...

I thought fatigue was just something that I would have to deal with, and I accepted it as “what happens when you get older.” I’m 47 and had lost my libido, and that was bothering me because I have a very loving husband. After seeing Dr. Ahn and starting the hormone replacement prescriptions and supplements, my sleep improved tremendously, and so did my energy level. And let’s just say my husband has also noticed other changes, and we are both much happier!

No Longer Tired
5 out of 5 stars

I can honestly say that seeing Dr. Ahn is one of the best things I have done for my health and my happiness.

Anonymous Patient
5 out of 5 stars

I am not exaggerating when I say I couldn’t recommend any doctor more highly.

Happy Patient
5 out of 5 stars

I waited and looked a long time to find a doctor like Dr. Ahn. While I knew I wanted someone to help me navigate the pitfalls of menopause, I was thrilled to find a female physi...

I waited and looked a long time to find a doctor like Dr. Ahn. While I knew I wanted someone to help me navigate the pitfalls of menopause, I was thrilled to find a female physician who had a passionate interest and firsthand understanding of this particular and taxing time in a woman’s life.

Dr. Ahn is passionate, energetic, and thoughtful about the management of my menopause and all of its related, not-so-fun side effects. She is available regularly and has been very responsive to all my questions. I have also become more informed about how I can help manage the whole aging process.
I am thrilled to have found her and have been completely happy to share her with many friends who currently find themselves at the start of this chapter in their lives. Wish I could have found her earlier.

Lynn D.
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Endoscopy Boston & Wellesley, MA Frequently Asked Questions

Is an endoscopy painful?

Upper endoscopy is performed under mild intravenous sedation that ensures patients are comfortable and have no memory of the procedure. Some patients experience mild throat discomfort for a day or two following the procedure, which typically resolves quickly. Significant pain during or after endoscopy is uncommon, and Dr. Ahn will discuss what to expect and how to manage any post-procedure discomfort during your pre-procedure consultation.

How long does an endoscopy take?

The procedure itself typically takes approximately 15 minutes from the start of endoscope insertion to completion. Additional time is spent before the procedure for preparation and sedation administration, and after the procedure in the recovery area while the effects of sedation wear off. Most patients spend a total of one to two hours at the endoscopy facility on the day of their procedure.

Can I drive myself home after an endoscopy?

No. Because upper endoscopy is performed under sedation, patients are not able to drive themselves home following the procedure. A companion is required to accompany you home, and driving and operating machinery should be avoided for the remainder of the day following the procedure.

Do I need to stop any medications before an endoscopy?

Certain medications may need to be adjusted or temporarily discontinued before endoscopy, including blood thinners, antiplatelet agents, and some diabetes medications. Dr. Ahn will review your current medications during the pre-procedure consultation and provide specific guidance on any adjustments needed before the procedure.

What happens if something abnormal is found during my endoscopy?

If abnormal tissue is identified during the procedure, Dr. Ahn can take biopsies at the time of endoscopy for pathological analysis. Depending on the nature of the finding, therapeutic interventions may also be performed during the same procedure. Dr. Ahn will explain any findings identified immediately after the procedure and discuss the significance of biopsy results and recommended next steps once pathological results are available.

How should I prepare for an endoscopy?

Upper endoscopy requires fasting for a defined period before the procedure to ensure the stomach is empty and the upper gastrointestinal tract can be clearly visualized. Typically, this involves avoiding solid food for at least six to eight hours and liquids for at least four hours before the procedure. Dr. Ahn will provide specific preparation instructions tailored to your procedure, including any medication adjustments needed.

How often should I have an endoscopy?

The appropriate frequency of endoscopy depends on the clinical indication. For patients with Barrett's esophagus, surveillance endoscopy is performed at intervals determined by the degree of dysplasia present. For patients with other conditions requiring follow-up endoscopic assessment, the timing is determined by the specific findings and clinical context. For patients without a specific indication for surveillance, endoscopy is performed based on symptoms and clinical judgment rather than on a fixed schedule.

Does insurance cover endoscopy?

Ahn Point Wellness is a cash-pay practice and does not accept insurance. Many patients find that HSA and FSA accounts can help offset the cost of procedures. Dr. Ahn will discuss the recommended procedure and associated costs during your consultation.

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