Summary

Dr. William Maher is a gastroenterologist and internal medicine physician who earned his medical degree from Rutgers New Jersey Medical School. He completed his residency at Strong Memorial Hospital and brings 34 years of clinical experience to his practice. Dr. Maher is fluent in both English and Spanish.

Dr. Maher practices at multiple locations throughout New Hampshire, including Somersworth, Rochester, Dover, and Portsmouth, with his primary affiliation at Wentworth Douglass Hospital. He specializes in treating colon polyps and diverticular conditions. His expertise includes performing colonoscopies and other endoscopic procedures to diagnose and treat digestive system disorders. Patients have given Dr. Maher an average rating of 4.2 out of 5 stars.

Overview based on verified provider data

Quick Facts

  • accepting new patients
  • 4.2
  • 34 years of experience
  • speaks English, Spanish
  • Strong Memorial Hospital
  • 4 written reviews
  • 2 specialties
  • 11 areas of expertise
  • 2 board certifications
  • 3 hospital affiliations
  • 5 office locations
  • Male

Patients’ Perspective

  • Gave an accurate diagnosis
  • Had a good bedside manner
  • Spent time with me

Office Locations

Dr. William Edward Maher has 5 locations

Atlantic Digestive Specialists

21 Clark WaySomersworth, NH 03878
Mon8:00 am - 5:00 pm
Tue8:00 am - 5:00 pm
Wed8:00 am - 5:00 pm
Thu8:00 am - 5:00 pm
Fri8:00 am - 5:00 pm
SatClosed
SunClosed

Frisbie Memorial Hospital

11 Whitehall RdRochester, NH 03867

Wentworth Surgery Center Llc

6 Works WaySomersworth, NH 03878
Mon8:00 am - 5:00 pm
Tue8:00 am - 5:00 pm
Wed8:00 am - 5:00 pm
Thu8:00 am - 5:00 pm
Fri8:00 am - 5:00 pm
SatClosed
SunClosed

Portsmouth Regional Hospital

333 Borthwick AvePortsmouth, NH 03801

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Dr. William Edward Maher, MDChimdi Mfebe, APRNDr. Alison Marie Clark, MDDr. Elizabeth Renee Dennis, DO
GastroenterologyGastroenterologyInternal MedicineInternal Medicine
Accepts New Patients Accepts New Patients Accepts New Patients
4.2 
34 Years of Experience 29 Years of Experience 21 Years of Experience
No Virtual Visit Option Virtual Visit Available No Virtual Visit Option No Virtual Visit Option
Speaks English, Spanish Speaks English Speaks Spanish, English Speaks English
Somersworth , NHLittle Rock , ARDover , NHWestbrook , ME
Med School: Rutgers New Jersey Medical School Med School: Chamberlain University College of Nursing Med School: Tufts University School Of Medicine Med School: Midwestern University-Chicago College Of Osteopathic Medicine
Current Profile
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Insurance Plans Accepted by Dr. William Edward Maher

  • Accepts Medicare
  • Accepts Medicaid

Medical Specialties

Dr. William Edward Maher has the following 2 specialties

Specialty Expertise

Dr. William Edward Maher has the following 11 areas of expertise

  • Abdominal Pain
  • Acid Reflux Disease (Gastroesophageal Reflux / GERD)
  • Acid Reflux Disease (GERD)
  • Celiac Disease
  • Colonoscopy
  • Constipation
  • Hemorrhoids
  • Hepatitis C
  • Internal Medicine
  • Irritable Bowel Syndrome (IBS)
  • Ulcerative Colitis

Certifications, License, & Education

34 Years Experience

Dr. William Edward Maher holds an expired medical license in the state of New Hampshire.

Medical License

Medical Doctor with an expired medical license in the state of New Hampshire that expired in 2026.

Education & Training

Residency

Completed their residency at Strong Memorial Hospital.

Medical School

Graduated from Rutgers New Jersey Medical School in 1992.

NPI Number

Dr. Maher's NPI number is 1477550739.

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Frequently Asked Questions

Where is Dr. William Maher's office located?
Dr. William Maher's office is located at 21 Clark Way, Somersworth, NH, 03878.
Does Dr. William Maher accept my insurance?
You can see the insurance plans that Dr. William Maher accepts on their Vitals profile.
Is Dr. William Maher accepting new patients?
Dr. William Maher is accepting new patients on Vitals. View Dr. William Maher's profile on Vitals to make an appointment.
What languages does Dr. William Maher speak?
Dr. William Maher speaks English and Spanish.
How can I make an appointment with Dr. William Maher?
You can find contact information for Dr. William Maher here on Vitals.

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