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Dr. Mark Detweiler, MD

Gastroenterology* Age 71
Dr. Mark Detweiler, MD
4.3 (22 Ratings)
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Dr. Mark Detweiler, MD is a Gastroenterologist in Londonderry, NH.
Dr. Mark Detweiler, MD
4.3 (22 Ratings)
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Dr. Mark Detweiler, MD

Gastroenterology* Age 71
Londonderry, NH
Accepting new patients
45 years of experience
Dr. Mark Detweiler, MD is a Gastroenterologist in Londonderry, NH.

About

Dr. Detweiler graduated from Penn State University College of Medicine. Dr. Mark Detweiler, MD is a Gastroenterologist in Londonderry, NH and has 45 years experience. Dr. Detweiler currently practices at Practice and are affiliated with Lahey Hospital and Medical Center, Burlington, Portsmouth Regional Hospital, Parkland Medical Center, Concord Hospital, Cheshire Medical Center, Catholic Medical Center, Morton Hospital, Concord Hospital-Laconia, York Hospital, Beth Israel Deaconess Hospital Plymouth, Mary Hitchcock Memorial Hospital, Monadnock Community Hospital, St. Joseph Hospital and Winchester Hospital. Dr. Detweiler has experience treating conditions like Gastrointestinal Malabsorption, Dysentery and Infectious Diarrheal Disease among other conditions at varying frequencies. At present, Dr. Detweiler received an average rating of 4.3/5 from patients and has been reviewed 22 times. Dr. Detweiler's office accepts new patients. Dr. Detweiler is board certified in Gastroenterology and accepts multiple insurance plans.

Explains Conditions Well

Patients said this doctor explains conditions well.

Trustworthy

Patients said this doctor is trustworthy.

Friendly Staff

Patients said the staff was friendly.

Easy Scheduling

Patients said scheduling was easy.

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Experience Check

Enter a condition or procedure
Gastrointestinal Malabsorption
Dysentery
Infectious Diarrheal Disease
Gastrointestinal Malabsorption
Dysentery
Infectious Diarrheal Disease
Gastrointestinal Malabsorption
Dysentery
Infectious Diarrheal Disease
Abdominal Pain
Celiac Disease
Constipation
Diarrhea
  • View other providers who treat Diarrhea
Enteritis
Gas-Bloat Syndrome
Heartburn
Inflammatory Bowel Disease
Intestinal Diverticulitis
Intestinal Malabsorption Carbohydrate
Lactose Intolerance
Retroperitoneum Cancer
Viral Enteritis
Vitamin_Deficiency
Flexible Sigmoidoscopy
Manometry
Rigid Proctosigmoidoscopy
Abdominal Disorders
Abscess
  • View other providers who treat Abscess
Alcoholic Fatty Liver
Anal or Rectal Pain
Anemia
  • View other providers who treat Anemia
Autoimmune Diseases
Bacterial Infections of the Digestive Tract
Candida Albicans Fungus Allergy
Cirrhosis
Colitis
  • View other providers who treat Colitis
Colon Disorders
Crohn's Disease
Diaphragmatic and Hiatal Hernia
Diffuse Esophageal Spasm
Duodenal Ulcer
Duodenitis
Dysphagia
Eosinophilic Esophagitis
Esophageal Achalasia and Cardiospasm
Esophageal Diseases
Esophageal Motility Disorders
Esophageal Ulcer
Esophagitis
Familial Adenomatous Polyposis
Food Allergy
Fungal Infections
Gallstones
Gastric Ulcer
Gastritis
Gastroesophageal Reflux Disease (GERD)
Gastrointestinal Diseases
Gastroparesis
Gluten Sensitivity
Hemochromatosis
Hemorrhoids
Hepatic Encephalopathy
Hepatitis
Hepatitis C
Hereditary Amyloidosis
Hiatal Hernia
Indigestion
Intestinal Diverticulosis
Intestinal Ulcer
Invasive Candidiasis
Irritable Bowel Syndrome
Liver Damage from Alcohol
Malnutrition
Nausea
  • View other providers who treat Nausea
Non-Alcoholic Fatty Liver Disease
Non-Neonatal Jaundice
Noninfectious Gastroenteritis and Colitis
Pancreatitis
Peptic Ulcer
Pernicious Anemia
Pouchitis
Proctoptosis
Pyloric Stenosis
Rectal Prolapse
Stomach and Small Intestine Cancer
Stomach Diseases
Ulcer
  • View other providers who treat Ulcer
Ulcerative Colitis
Unexplained Weight Loss
Viral Hepatitis
Viral Infection
Vitamin B12 Anemia
Vomiting Disorders
Colon Cancer Screening
Gallbladder Scan
Hepatitis A Screening
Hepatitis B Virus Screening
Hepatitis C Virus Screening
Hepatitis Screening
Impedance Testing
Instrumental Diagnostic Evaluation for Dysphagia
Liver Function Test
pH Probe
  • View other providers who treat pH Probe
Screening Colonoscopy
Ultrasound, Endoanal
Ultrasound, Esophageal
VAP Lipid Testing
Wireless pH Testing

Insurance Accepted

* Please verify this information when scheduling an appointment.
  • Humana
  • HealthyBlue 2.0
  • First Health (Coventry Health Care)
  • Curative EPO
    Curative PPO Plus
    Curative PPO
  • Gold Pathway X (Off Exchange)-NH HMO
  • Tricare
  • Medicare
  • Tufts Health Plans
  • AvMed
  • Aetna
  • Blue Cross and Blue Shield
  • Cigna
  • Harvard Pilgrim Health Care PPO
  • Coventry Health Care
  • United Healthcare

Locations

  1. 1 Londonderry Gastroenterology Associates PA
    1B Commons Dr Unit 9A, Londonderry, NH 03053
    Icon Directions Right Arrow Directions Phone Icon (603) 818-4712

Patient Satisfaction

Likelihood to recommend Dr. Detweiler
4.3
Based on 22 Reviews
5 Stars (18)
4 Stars (0)
3 Stars (0)
2 Stars (0)
1 Star (4)

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Patient Reviews
Jan 25, 2021
Over the last decade, I have seen GI doctors at some of the finest NH hospitals, but none of them did what Dr. Detweiler did for me in the first visit alone. First, he read my comprehensive medical history carefully prior to our meeting. He didn't think only about GI but about my health overall. He then educated me about the GI system. He listened to me describe my symptoms, and believed me, never rushed me and helped me shape the picture of my health. No other GI doctor I have been to has ever approached my health is this way. He is one of the wisest doctors I have met in my life.
Susan Shapiro — Jan 25, 2021
See more reviews on Healthgrades
Photo: Dr. Mark Detweiler, MD
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Dr. Detweiler's Office & Staff

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  • Staff friendliness and courteousness
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Experience with Dr. Detweiler

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  • How well provider explains medical condition(s)
  • How well provider listens and answers questions
  • Hpends appropriate amount of time with patients

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About Me

Specialties*
Gastroenterology
Integrative Medicine
Holistic Medicine
Applied Clinical Nutrition
Specialties*
  • *Sharecare does not verify qualifications for medical specialties. Please verify your provider's specialty and qualifications directly with your provider and applicable medical board.
Education

Education

Medical Education
  • Penn State University College of Medicine
    1979
Medical Education

Board Certifications

Board Certifications
  • Gastroenterology and Internal Medicine
Board Certifications
What’s a board certification and why is it important that my provider has one?

A board certification represents a provider’s dedication to ongoing training in one or more specialties, including the completion of intensive exams. While not all specialties have board certifications, if your provider does have one they’ve taken the extra step to master their specialty and to keep up with the latest advancements in their field.

Internship

Internship
  • University Vt Medical Center Hospital
    1980
Internship

Fellowship

Fellowship Hospital
  • University Utah Medical Center
    1984
Fellowship Hospital
Common Questions and Answers
Responses are sourced directly from patients.
Does Dr. Detweiler communicate via email?
1 user said yes.
Yes
(1)
No
(0)
Does Dr. Detweiler offer telehealth services or virtual visits?
1 user said yes.
Yes
(1)
No
(0)
Does Dr. Detweiler offer an online patient portal?
1 user said yes.
Yes
(1)
No
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Does Dr. Detweiler have free onsite parking?
1 user said yes.
Yes
(1)
No
(0)
Does Dr. Detweiler offer weekend visits?
No users said yes.
Yes
(0)
No
(2)
Does Dr. Detweiler offer evening visits?
1 user said yes.
Yes
(1)
No
(0)
Does Dr. Detweiler specialize in working with children or adolescents?
No responses yet.
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Does Dr. Detweiler specialize in working with seniors?
No responses yet.
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Does Dr. Detweiler specialize in couples therapy?
No responses yet.
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(0)
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Does Dr. Detweiler specialize in working with LGBTQ+ community?
No responses yet.
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Does Dr. Detweiler accept insurance?
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(0)
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Frequently Asked Questions

Find contact information here to make an appointment.

A list of accepted insurance providers is available on the Sharecare insurance check. It is always a good idea to verify your insurance when making an appointment.

New patients are generally accepted by Dr. Mark Detweiler, MD. To arrange an appointment, call the number on Dr. Detweiler's profile.

Dr. Detweiler frequently treats the following conditions: Gastrointestinal Malabsorption, Dysentery and Infectious Diarrheal Disease. See more on Sharecare.

Dr. Mark Detweiler, MD is affiliated with Lahey Hospital and Medical Center, Burlington, Portsmouth Regional Hospital, Parkland Medical Center, Concord Hospital, Cheshire Medical Center, Catholic Medical Center, Morton Hospital, Concord Hospital-Laconia, York Hospital, Beth Israel Deaconess Hospital Plymouth, Mary Hitchcock Memorial Hospital, Monadnock Community Hospital, St. Joseph Hospital and Winchester Hospital.

Yes, Dr. Mark Detweiler, MD holds board certification in Gastroenterology and Internal Medicine.

Hospital Affiliations

  • Lahey Hospital and Medical Center, Burlington

    45 Mall Rd, Burlington, MA

  • Portsmouth Regional Hospital

    333 Borthwick Ave, Portsmouth, NH

  • Parkland Medical Center

    1 Parkland Dr, Derry, NH

  • Concord Hospital

    250 Pleasant St, Concord, NH

  • Cheshire Medical Center

    580 Court St, Keene, NH

  • Catholic Medical Center

    100 McGregor St, Manchester, NH

  • Morton Hospital

    88 Washington St, Taunton, MA

  • Concord Hospital-Laconia

    80 Highland St, Laconia, NH

  • York Hospital

    15 Hospital Dr, York, ME

  • Beth Israel Deaconess Hospital Plymouth

    275 Sandwich St, Plymouth, MA

  • Mary Hitchcock Memorial Hospital

    1 Medical Center Dr, Lebanon, NH

  • Monadnock Community Hospital

    452 Old Street Rd, Peterborough, NH

  • St. Joseph Hospital

    172 Kinsley St, Nashua, NH

  • Winchester Hospital

    41 Highland Ave, Winchester, MA