JD
25 Years of Experience
Accepting patients
Affiliated with a Castle Connolly Top Hospital
Who is Dr. Dowd, Gastroenterologist in Manchester, NH?
Dr. John Dowd, DO is a Gastroenterologist, who primarily practices in Manchester, NH with 2 additional practice locations. He has been practicing for over 25 years and is board certified. Dr. Dowd graduated from University of Osteopathic Medicine and Health Sciences and completed his residency at Norwalk Hosp, Gastroenterology; Umdnj-Sch Of Osteo Med, Internal Medicine. Dr. Dowd is fluent in English, and is currently seeing new patients. Dr. Dowd’s practice accepts Cigna, Medicaid, Medicare, UnitedHealthcare, Aetna and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. Dowd’s office at (978) 287-3835.
What are Areas of Expertise for Dr. Dowd?
Dr. John Dowd, DO is a highly-rated, board-certified Gastroenterologist known for expertly diagnosing, treating, and managing a wide array of related conditions or procedures. Utilizing the latest medical advancements and evidence-based practices, Dr. Dowd empowers patients to confidently navigate their health journey, specializing in Colon Cancer Screening, Esophageal Disorders, Inflammatory Bowel Disease, Pancreatic & Biliary Disease, or comprehensive wellness support. Serving the Manchester/NH community, Dr. Dowd is dedicated to enhancing lives through expert, patient-centered care.
Where did Dr. Dowd go to medical school and complete their residency?
Residency: Norwalk Hosp, Gastroenterology; Umdnj-Sch Of Osteo Med, Internal Medicine | Kennedy Memorial Hospital Nj
Medical School: Des Moines University College of Osteopathic Medicine and Health Sciences | University of Osteopathic Medicine and Health Sciences | University of Osteopathic Medicine and Health Sciences
What languages does Dr. Dowd speak?
Dr. Dowd and their clinical team can communicate with patients in the following languages:
English
What conditions does Dr. Dowd treat?
As a Gastroenterologist, Dr. Dowd diagnoses, treats, and manages a wide range of conditions. This condition information is derived from anonymized insurance claims and highlights the medical conditions most commonly treated by Dr. Dowd. It provides insight into the doctor’s areas of experience and expertise based on real-world patient encounters from the past two years, updated quarterly.
Also known as:
- Colon Cancer Screening
- Health Screening
- Colorectal Cancer Screening (PDQ®)
- Screening Tests to Detect Colorectal Cancer and Polyps
- Tests to Detect Colorectal Cancer and Polyps
- Colorectal Cancer Screening
- Colonoscopy Screening
- Bowel Cancer Screening
ICD-10 Codes:
- Z1211: Encounter for screening for malignant neoplasm of colon
Also known as:
- Benign Ascending Colon Polyp
- Benign Transverse Colon Polyp
- Benign Cecum Polyp
- Benign Sigmoid Colon Polyp
- Benign Tumor
- Colonic Polyps
- Colon Polyps
- Non-cancerous ascending colon growth
- Ascending colon adenoma
- Ascending colon benign tumor
- Non-cancerous transverse colon growth
- Transverse colon adenoma
- Transverse colon benign tumor
- Non-cancerous cecum growth
- Cecal adenoma
- Cecum benign tumor
- Non-cancerous sigmoid colon growth
- Sigmoid colon adenoma
- Sigmoid colon benign tumor
ICD-10 Codes:
- D122: Benign neoplasm of ascending colon
- D123: Benign neoplasm of transverse colon
- D120: Benign neoplasm of cecum
- D125: Benign neoplasm of sigmoid colon
Also known as:
- Colon Polyps
- Non-Infectious Gastroenteritis and Colitis
- Colonic Polyps
- Digestive Disease
- Colorectal Polyps
- Intestinal Polyps
- Bowel Polyps
- Inflammation of Stomach and Intestines
- Non-Bacterial Colitis
- Gut Inflammation
ICD-10 Codes:
- Z86010: Personal history of colon polyps
- K529: Noninfective gastroenteritis and colitis, unspecified
Also known as:
- Upper Middle Abdominal Pain
- Abdominal Pain
- Epigastric pain
- Pain below breastbone
- Upper stomach pain
- Stomach Ache
- Belly Pain
- Stomach Pain
ICD-10 Codes:
- R1013: Epigastric pain
- R109: Unspecified abdominal pain
Also known as:
- Dark, Tarry Stools (Melena)
- Gastrointestinal Bleeding
- Melena
- Black Stools
- Upper GI Bleed Signs
ICD-10 Codes:
- K921: Melena
Also known as:
- Crohn's Disease
- Crohn’s Disease
- Regional Enteritis
- Inflammatory Bowel Disease (IBD)
- Terminal Ileitis
ICD-10 Codes:
- K5090: Crohn's disease, unspecified, without complications
Also known as:
- Difficulty Swallowing
- Swallowing Disorder
- Dysphagia
- Trouble swallowing
- Painful swallowing
ICD-10 Codes:
- R1310: Dysphagia, unspecified
Also known as:
- Heartburn
- Acid Reflux
- Indigestion
- GERD Symptoms
ICD-10 Codes:
- R12: Heartburn
Also known as:
- Colon Polyps
- Colonic Polyps
- Colorectal polyps
- Bowel polyps
- Intestinal polyps
ICD-10 Codes:
- K635: Polyp of colon
Also known as:
- Follow-up After Treatment (Non-Cancer)
- Post-Treatment Check-up
- Aftercare Visit
- Recovery Monitoring Exam
ICD-10 Codes:
- Z09: Encounter for follow-up examination after completed treatment for conditions other than malignant neoplasm
Also known as:
- Iron Deficiency Anemia
- Anemia
- Iron
- Anemia from Iron Lack
- Low Iron Anemia
- Sideropenic Anemia
ICD-10 Codes:
- D509: Iron deficiency anemia, unspecified
Also known as:
- Ulcerative Colitis
- Colitis
- Inflammatory Bowel Disease (IBD)
- Chronic Colitis
ICD-10 Codes:
- K5190: Ulcerative colitis, unspecified, without complications
Also known as:
- Abdominal Bloating
- Gas
- Gas in the Digestive Tract
- Bloated Stomach
- Swollen Belly
- Gaseous Distension
ICD-10 Codes:
- R140: Abdominal distension (gaseous)
Also known as:
- Diarrhea
- Loose stools
- Runny poop
- Frequent bowel movements
ICD-10 Codes:
- R197: Diarrhea, unspecified
Also known as:
- Barrett's Esophagus
- Esophagus Disorder
- Barrett’s Esophagus
- Barrett's condition
- Esophageal metaplasia
ICD-10 Codes:
- K2270: Barrett's esophagus without dysplasia
Which procedures does Dr. Dowd perform as a Gastroenterologist?
As a Gastroenterologist, procedures performed by a Dr. John Dowd may include:
- Colonoscopy
- Colonoscopy Consultation
- Colorectal Cancer Screening
- Endoscopic Ultrasound
- Endoscopy / Endoscopic Ultrasound
- Gastric Balloon
- Gastric Stimulator Implantation Consultation
- Gastric Stimulator Implantation Follow Up
For detailed information, please contact Dr. Dowd's office.
Does Dr. Dowd accept my insurance?
Dr. Dowd accepts most major insurance plans. Important: Please call our office at (978) 287-3835 before your appointment to verify that your specific plan and network are accepted.
What insurance plans does Dr. Dowd accept in Manchester, NH?
Dr. Dowd in Manchester, NH accepts plans from many carriers. While this list is updated regularly, it is not a guarantee of coverage.
Top Insurances
BCBS Unspecified
Blue Cross Blue Shield of Massachusetts
Cigna
CVS Health (formerly Aetna)
Elevance Health Inc. (formerly Anthem)
Express Scripts
Medicaid
Medicare
Point32Health
UnitedHealthcare
View All Insurances
Where is Dr. Dowd's office located?
Recognitions
Castle Connolly Doctor’s Choice Awards
Doctor’s Choice - 2025
Among the most nominated for the Castle Connolly Top Doctor recognition in 2025
What is Dr. Dowd's NPI number?An National Provider Identifier (NPI) is a unique ID number that identifies doctors and healthcare providers nationwide.
Dr. Dowd's National Provider Identifier (NPI) number is 1164498648.
What common questions do patients ask about Dr. Dowd?
Here are answers to patients Frequently Asked Questions (FAQ’s) about Dr. Dowd
What is Dr. John Dowd's specialty?
Dr. Dowd is a Gastroenterologist near Manchester, NH. An internist focused on diagnosing and treating disorders of the digestive system, encompassing the stomach, intestines, liver, and gallbladder. This specialist manages conditions like abdominal pain, ulcers, diarrhea, cancer, and jaundice, and performs intricate diagnostic and therapeutic procedures using endoscopes to examine internal organs. Contact Dr. Dowd to book an appointment today.
Is this Dr. John Dowd affiliated with a ranked Castle Connolly Top Hospital?
Yes, Dr. Dowd is affiliated with Emerson Health which is a Castle Connolly Top Hospital. Castle Connolly Top Hospitals are healthcare institutions recognized for their excellence in specific medical procedures and overall patient care. They are identified through a rigorous peer nomination process, evaluating factors like patient outcomes, quality of care, and expertise. The list recognizes hospitals that excel in 20 or more specific medical procedures, representing the top 25% nationwide. Castle Connolly Top Hospitals
Where can I learn more about Gastroenterologist?
Explore Gastroenterologist with insights from trusted medical experts on EverydayHealth.com, where you'll find the most relevant content and helpful condition guides for up-to date information about symptoms, causes, diagnosis, treatment and more. See all our health guides to find trusted information on medical conditions from our experts at Everyday Health.
Is John Dowd accepting new patients in Manchester, NH?
Yes, Dr. John Dowd is accepting new patients at this time.
Does Dr. John Dowd offer online booking?
Please contact Dr. Dowd's office at (978) 287-3835 for information about online booking, telehealth, or to schedule an appointment.
How can I make an appointment with John Dowd?
Please contact Dr. Dowd's office at (978) 287-3835 for information regarding telehealth appointment availability or for scheduling assistance.
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TM
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