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Dr. William E. Maher, MD
NPI1477550739PAC ID5991693392
- Medicare services, 2024
- 1,172
- Medicare patients, 2024
- 845
- Part D claims, 2024
- 917
- Publications
- 1
- MIPS score, 2024
- 75
- Practice address
- 6 Works Way, Somersworth, NH 03878
- Practice phone
- Call (603) 285-9288
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Wentworth Surgery Center
Surgery Center - Medicare-Certified · Somersworth, New Hampshire
Find Dr. Maher's professional email, personal email and mobile number
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Dr. William E. Maher is a gastroenterologist in Somersworth, New Hampshire
Dr. Maher practices at Wentworth Surgery Center in Somersworth, New Hampshire.
Dr. Maher's NPI, 1477550739, was assigned on July 1, 2005. Dr. Maher graduated from Rutgers New Jersey Medical School in 1992. Dr. Maher holds New Hampshire license 10956.
NPI and contact details
- NPI
- 1477550739NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5991693392
- NPI enumeration date
- July 1, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (603) 285-9288
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 60
- Medical school graduation
- 1992
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. William E. Maher practices at 2 locations in Somersworth, New Hampshire
Dr. Maher's primary practice is Wentworth Surgery Center, at 6 Works Way, Somersworth, NH 03878. The practice phone is (603) 285-9288. Dr. Maher also practices at Wentworth Surgery Center, LLC, 7 Works Way, Somersworth, NH 03878.
- Wentworth Surgery CenterPrimary6 Works Way, Somersworth, NH 03878Phone(603) 285-9288
- Wentworth Surgery Center, LLC7 Works Way, Somersworth, NH 03878 · Strafford CountyPhone(603) 285-9288
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; and Dmand AI Practice Data
Dr. William E. Maher is affiliated with 7 sites of care and 1 medical group
Dr. Maher's primary practice is Wentworth Surgery Center in Somersworth, New Hampshire. Dr. Maher is also affiliated with Wentworth-Douglass Hospital. The medical group on file is Atlantic Digestive Specialists. Dmand AI also links Dr. Maher to 4 more hospitals and 1 group practice or clinic, each named with a free account.
Wentworth Surgery CenterPrimary
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. William E. Maher's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Maher practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Wentworth Surgery Center | Available with a free account |
| +6 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. William E. Maher is one of 87 gastroenterologists in New Hampshire
Gastroenterology is Dr. Maher's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Maher is licensed in New Hampshire.
Specialties and state licenses
- Gastroenterology, New HampshirePrimary
Gastroenterologists near Dr. Maher
Counts of gastroenterologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. William E. Maher billed Medicare for 1,172 services in 2024
CMS data shows 1,172 Medicare services from Dr. Maher across 18 procedure codes in 2024, for 845 Medicare patients. Medicare paid $131,379 for them.
Medicare services, 20241,172
Medicare patients845
Paid by Medicare$131,379
Procedure codes18
Dr. Maher's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 8542024: 64624%
- Surgery
- 2023: 4192024: 33520%
- Other services
- 2023: 1642024: 14710%
- Lab and pathology
- 2023: 202024: 1620%
- Tests and treatments
- 2023: 462024: 1567%
- Imaging
- 2023: 02024: 13
- Drugs given in the office
- 2023: 1,2882024: 0100%
Where Dr. Maher's Medicare services took place, 2024
- In an office46440%
- In a facility70860%
Dr. Maher compared with the New Hampshire median for gastroenterologists, 2024
- Dr. Maher
- New Hampshire median
- Medicare services
- 1,172vs 4922.4 times
- Medicare patients
- 845vs 3572.4 times
- Part D claims
- 791vs 2283.5 times
Medians across 82 gastroenterologists in New Hampshire with Dmand AI profiles that report each measure.
Dr. Maher's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Maher and other gastroenterologists in New Hampshire.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. William E. Maher treated 845 Medicare patients in 2024, average age 73
CMS counts 845 Medicare patients who saw Dr. Maher in 2024. The largest group is 65 to 74, with 415 patients. 75% of them have high cholesterol, and 72% have high blood pressure. 12% are also on Medicaid. Their average risk score is 1.16, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Maher's median patient age at 68, with 54% women.
Medicare patients, 2024845
Average age73
Average risk score1.16
Also on Medicaid12%
Dr. Maher's Medicare patients by age, 2024
Dr. Maher's Medicare patients by sex, 2024
- Women43752%
- Men40848%
Chronic conditions among Dr. Maher's Medicare patients, 2024
- High cholesterol75%
- High blood pressure72%
- Arthritis46%
- Anxiety33%
- Mood disorders29%
- Depression26%
- Diabetes26%
- Ischemic heart disease24%
Share of Medicare patients with each condition. A patient can have several.
Dr. Maher's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 68
Patient panel by sex, all payers
- Women54%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. William E. Maher wrote 917 Medicare Part D claims in 2024
In 2024, Dr. Maher wrote 917 Medicare Part D claims for 254 patients. 90% of them were for generic drugs. CMS names the drug for 791 of them, across 17 drugs with 11 or more claims each, at $65,952 in total drug cost. In 2023, CMS named 768 claims across 18 drugs.
Part D claims, 2024917
Drugs named by CMS17
Total drug cost$65,952
Part D patients254
Dr. Maher's Part D claims by kind of drug, 2024
- Generic822 claims90%
- Brand-name95 claims10%
Dr. Maher's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Maher's Part D claims, 2024
- Antibiotics1%13 of 917 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 7682024: 7913%
Drugs named by CMS: 17 in 2024, 18 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. William E. Maher scored 75 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 75 out of 100 for Dr. Maher for performance year 2024, reported as part of a group. Dr. Maher accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Maher as offering telehealth. CMS counts 241 procedures of colonoscopy by Dr. Maher, more than 96% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- MIPS final score, 2024
- 75 of 100
Where Dr. Maher ranks in Medicare procedure volume
- Colonoscopy
- 96th percentile241 procedures
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 87th percentile168 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
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Dr. William E. Maher has 1 publication on record
Dmand AI links 1 paper to Dr. Maher. Dr. Maher's most frequent co-author is Jose A. Bazan, DO.
Papers1
Dr. Maher's most frequent co-authors
Recent publications by Dr. Maher
See who Dr. Maher researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Maher works with, so you can find a warm path to the right gastroenterologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. William E. Maher received $2,579 in industry payments from 2016 to 2025
CMS Open Payments shows 71 general payments to Dr. Maher from 15 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 99% of the total. Cook Medical LLC paid the most, $1,558.
General payments to Dr. Maher by program year, 2016 to 2025
General payments to Dr. Maher by kind, 2016 to 2025
$2.6Kin total
- Food and beverage$2,55499%
- Education$251%
Companies that paid Dr. Maher the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. William E. Maher graduated from Rutgers New Jersey Medical School
Dr. Maher graduated from Rutgers New Jersey Medical School in 1992.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. William E. Maher's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Affiliation DataDmand AI Practice Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. William E. Maher
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. William E. Maher's NPI number?
Dr. William E. Maher's NPI number is 1477550739. It was assigned on July 1, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. William E. Maher?
Dr. William E. Maher is a gastroenterologist in Somersworth, New Hampshire. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. William E. Maher practice?
Dr. Maher practices at 6 Works Way, Somersworth, NH 03878. Dr. Maher also practices at 7 Works Way, Somersworth, NH 03878. Dr. Maher's primary practice is Wentworth Surgery Center in Somersworth, New Hampshire. Dmand AI also links Dr. Maher to 4 hospitals and 1 group practice or clinic.
What is Dr. William E. Maher's office phone number?
The practice phone on file for Dr. Maher is (603) 285-9288.
What is Dr. William E. Maher's medical license number?
Dr. Maher holds New Hampshire license 10956.
Which hospitals is Dr. William E. Maher affiliated with?
Dr. Maher is affiliated with Wentworth-Douglass Hospital. Dmand AI links Dr. Maher to 4 more hospitals.
What medical group is Dr. William E. Maher part of?
Dr. Maher is linked to Atlantic Digestive Specialists.
Does Dr. William E. Maher accept Medicare?
Yes. CMS data shows Dr. Maher billed Medicare for 1,172 services in 2024, and Dr. Maher accepts Medicare assignment.
Does Dr. William E. Maher offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Maher as offering telehealth services.
What is Dr. William E. Maher's MIPS score?
Dr. Maher's MIPS final score for performance year 2024 is 75 out of 100, reported as part of a group.
Show 8 more questionsShow fewer questions
How many Medicare patients does Dr. William E. Maher see?
CMS counts 845 Medicare patients who saw Dr. Maher in 2024, with an average age of 73.
What services does Dr. William E. Maher bill to Medicare?
In 2024, Dr. Maher's most billed Medicare services were office visit, established patient (99214), hospital inpatient care (99232) and medicare service (G0105).
Where did Dr. William E. Maher go to medical school?
Dr. Maher graduated from Rutgers New Jersey Medical School in 1992.
What drugs does Dr. William E. Maher prescribe most?
In 2024 Medicare Part D data, Dr. Maher's most prescribed drugs by claims were Omeprazole, Famotidine and Pantoprazole Sodium.
Has Dr. William E. Maher received payments from drug or device companies?
CMS Open Payments shows $2,579 in general payments to Dr. Maher from 15 companies from 2016 to 2025. The largest total came from Cook Medical LLC.
How long has Dr. William E. Maher been practicing?
Dr. Maher graduated from medical school in 1992, 34 years ago.
Does Dr. William E. Maher do research?
Dmand AI links 1 publication to Dr. Maher.
Who does Dr. William E. Maher publish with?
Dr. Maher's most frequent co-authors are Jose A. Bazan, DO (1 shared paper).
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