William E. Maher, M.D.
Gastroenterology Physician · Somersworth, NH
William E. Maher, M.D. is a gastroenterology physician with a practice address in Somersworth, New Hampshire, and NPI 1477550739, issued on Jul 1, 2005. Check the license (New Hampshire 10956, as entered in NPPES) on the New Hampshire Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- William E. Maher
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 10956 NH
Self-reported in NPPES; status is on the state search - Practice location
- 21 Clark Way, Somersworth, NH 03878
- Phone
- (603) 692-2228
- Enumerated
- Jul 1, 2005
- Record last updated
- Sep 30, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (603) 743-6732
- Medicaid ID
- 30201062 NH
- Medicare enrollment
- Enrolled (PECOS I20041001000052); accepts Medicare assignment
- Medical or professional school
- Rutgers New Jersey Medical School, 1992
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 110 in New Hampshire → Look up another NPI →
Also registered at 21 Clark Way
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sonya Alyea, APRNNurse Practitioner1023203734
- Aaron Corbett, APRN, FNP-CNurse Practitioner1720586308
- Aristotle Damianos, M.D.Gastroenterology Physician1811994171
- Roger Epstein, M.D.Gastroenterology Physician1821095183
- Sukeerti Kesar, M.D.Gastroenterology Physician1114337870
- Jennifer Lewis, MDGastroenterology Physician1003075771
Verify William E. Maher in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNew Hampshire Board of Medicine
Search for license 10956Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
13% more Medicare Part D claims than the average gastroenterology physician in 2024
917 Medicare Part D claims for 254 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims.
Most prescribed
- Omeprazole192 claims
- Famotidine166 claims
- Pantoprazole Sodium115 claims
- Ursodiol60 claims
- Colestipol Hcl55 claims
- Sucralfate30 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $128.27
6 payments; by number, the most common kind was food and beverage; the largest payer was Takeda Pharmaceuticals U.S.A., Inc. The 13,350 providers of this specialty with any payment received $5,015.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Atlantic Digestive Specialists PLLCSomersworth, NH
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William E. Maher among 110 gastroenterology physician records in New Hampshire
William E. Maher, M.D. is one of 110 gastroenterology physician records with a practice address in New Hampshire. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 86% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 73% of these records are
- Graduated1992 · median 2002 among the 80 with a school on file
- Record last updated2011 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a New Hampshire practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
8 gastroenterology physician records list a practice address in Somersworth
They are 8 of the 333 NPPES records with a practice address in Somersworth, and 110 gastroenterology physician records in New Hampshire.
All 110 in New Hampshire → Every provider in Somersworth → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Aristotle Damianos, M.D.Somersworth, NH 038781811994171
- Roger Epstein, M.D.Somersworth, NH 038781821095183
- Sukeerti Kesar, M.D.Somersworth, NH 038781114337870
- Jennifer Lewis, MDSomersworth, NH 038781003075771
- Sean Lynch, MDSomersworth, NH 038781326222431
- Dalia Mahmoud Hassan Elamin, MDSomersworth, NH 038781235536913
- Alain Ades, M.D.Stratham, NH 038851457327900
- Francis Colizzo, M.D.Stratham, NH 038851235105701
Common questions
What is William E. Maher, M.D.'s NPI number?
William E. Maher, M.D.'s National Provider Identifier (NPI) is 1477550739, issued on Jul 1, 2005. An NPI identifies a provider in billing; it is not a license.
Where is William E. Maher, M.D. located?
The NPPES record lists a practice address at 21 Clark Way, Somersworth, NH, 03878. Phone: (603) 692-2228. Providers update this record themselves, so call before visiting.
How can I verify William E. Maher, M.D.'s license?
NPPES lists New Hampshire license number 10956, as entered by the provider. Search the New Hampshire Board of Medicine at https://www.oplc.nh.gov/board-medicine. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William E. Maher, M.D. prescribe under Medicare Part D?
In 2024, William E. Maher, M.D. had 917 Medicare Part D claims for 254 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
What is William E. Maher, M.D.'s MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.