Dr. William Stephen Maher, MD
- Medicare services, 2024
- 1,743
- Medicare patients, 2024
- 455
- Part D claims, 2024
- 6,023
- Hospital affiliations
- 6
- Industry payments
- $88
- Practice address
- 2014 Washington Street, Newton, MA 02462
- Practice phone
- Call (617) 243-6000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Maher's professional email, personal email and mobile number
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Dr. William Stephen Maher is an internist in Newton Lower Falls, Massachusetts
Dr. Maher practices at Newton-Wellesley Hospital in Newton, Massachusetts, part of Mass General Brigham.
Dr. Maher's NPI, 1194835637, was assigned on August 30, 2006. Dr. Maher graduated from Georgetown University School of Medicine in 1991. Dr. Maher holds Massachusetts license 78946.
- NPI
- 1194835637NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1658321294
- NPI enumeration date
- August 30, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (617) 243-6000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 61
- Medical school graduation
- 1991
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. William Stephen Maher practices at Newton-Wellesley Hospital in Newton, Massachusetts
Dr. Maher's primary practice is Newton-Wellesley Hospital, at 2014 Washington Street, Newton, MA 02462 in Middlesex County. The practice phone is (617) 243-6000.
- Newton-Wellesley Hospital2014 Washington Street, Newton, MA 02462 · Middlesex CountyPhone(617) 243-6000
Source: Dmand AI Affiliation Data
Dr. William Stephen Maher is affiliated with 13 sites of care and 1 medical group
Dr. Maher's primary practice is Newton-Wellesley Hospital in Newton, Massachusetts, part of Mass General Brigham. Dr. Maher is also affiliated with Massachusetts General Hospital. The medical group on file is Mass General Brigham Medical Group. Dmand AI also links Dr. Maher to 4 more hospitals, 4 home health agencies, 1 group practice or clinic, 1 hospice and 1 hospital outpatient department, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. William Stephen Maher's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Maher practices, 13 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Newton-Wellesley Hospital | Available with a free account |
| +12 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. William Stephen Maher is one of 5,528 internists in Massachusetts
Internal medicine is Dr. Maher's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Maher is licensed in Massachusetts.
Specialties and state licenses
- Internal medicine, MassachusettsPrimary
Internists near Dr. Maher
Counts of internists 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 Stephen Maher billed Medicare for 1,743 services in 2024
CMS data shows 1,743 Medicare services from Dr. Maher across 19 procedure codes in 2024, for 455 Medicare patients. Medicare paid $133,011 for them. Every service was in an office.
Dr. Maher's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Other services
- 2023: 4482024: 922106%
- Office and hospital visits
- 2023: 7162024: 6706%
- Tests and treatments
- 2023: 1472024: 11224%
- Lab and pathology
- 2023: 342024: 3915%
Dr. Maher compared with the Massachusetts median for internists, 2024
- Dr. Maher
- Massachusetts median
- Medicare services
- 1,743vs 4314.0 times
- Medicare patients
- 455vs 1942.3 times
- Part D claims
- 5,366vs 40213.3 times
Medians across 5,369 internists in Massachusetts 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 internists in Massachusetts.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. William Stephen Maher treated 455 Medicare patients in 2024, average age 76
CMS counts 455 Medicare patients who saw Dr. Maher in 2024. The largest group is 75 to 84, with 198 patients. 75% of them have high cholesterol, and 65% have high blood pressure. 3% are also on Medicaid. Their average risk score is 1.05, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Maher's median patient age at 72, with 22% women.
Dr. Maher's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Maher's Medicare patients by sex, 2024
- Women13429%
- Men32171%
Chronic conditions among Dr. Maher's Medicare patients, 2024
- High cholesterol75%
- High blood pressure65%
- Arthritis36%
- Ischemic heart disease25%
- Anxiety22%
- Cancer22%
- Chronic kidney disease22%
- Atrial fibrillation19%
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 72
Patient panel by sex, all payers
- Women22%
- Men78%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. William Stephen Maher wrote 6,023 Medicare Part D claims in 2024
In 2024, Dr. Maher wrote 6,023 Medicare Part D claims for 653 patients. 91% of them were for generic drugs. CMS names the drug for 5,366 of them, across 97 drugs with 11 or more claims each, at $501,346 in total drug cost. In 2023, CMS named 5,129 claims across 93 drugs.
Dr. Maher's Part D claims by kind of drug, 2024
- Generic5,481 claims91%
- Brand-name531 claims9%
- Other11 claims0%
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
- Opioids2%134 of 6,023 claims
- Antibiotics3%189 of 6,023 claims
- Antipsychotics, patients 65 and over0%19 of 6,023 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: 5,1292024: 5,3665%
Drugs named by CMS: 97 in 2024, 93 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 Stephen Maher offers telehealth to Medicare patients
Dr. Maher accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Maher as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. William Stephen Maher received $88 in industry payments from 2019 to 2025
CMS Open Payments shows 2 general payments to Dr. Maher from 2 drug and device companies from 2019 to 2025. Food and beverage make up the largest share, 100% of the total. Boston Scientific Corporation paid the most, $70.
General payments to Dr. Maher by program year, 2019 to 2025
Companies that paid Dr. Maher the most, 2019 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. William Stephen Maher graduated from Georgetown University School of Medicine
Dr. Maher graduated from Georgetown University School of Medicine in 1991.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. William Stephen 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 | Dmand AI Affiliation 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) |
| 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 Stephen 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 Stephen Maher's NPI number?
Dr. William Stephen Maher's NPI number is 1194835637. It was assigned on August 30, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. William Stephen Maher?
Dr. William Stephen Maher is an internist in Newton Lower Falls, Massachusetts. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. William Stephen Maher practice?
Dr. Maher practices at 2014 Washington Street, Newton, MA 02462. Dr. Maher's primary practice is Newton-Wellesley Hospital in Newton, Massachusetts, part of Mass General Brigham. Dmand AI also links Dr. Maher to 4 hospitals, 4 home health agencies, 1 group practice or clinic, 1 hospice and 1 hospital outpatient department.
What is Dr. William Stephen Maher's office phone number?
The practice phone on file for Dr. Maher is (617) 243-6000.
What is Dr. William Stephen Maher's medical license number?
Dr. Maher holds Massachusetts license 78946.
Which hospitals is Dr. William Stephen Maher affiliated with?
Dr. Maher practices at Newton-Wellesley Hospital in Newton, Massachusetts. Dr. Maher is also affiliated with Massachusetts General Hospital. Dmand AI links Dr. Maher to 4 more hospitals.
What medical group is Dr. William Stephen Maher part of?
Dr. Maher is linked to Mass General Brigham Medical Group.
Does Dr. William Stephen Maher accept Medicare?
Yes. CMS data shows Dr. Maher billed Medicare for 1,743 services in 2024, and Dr. Maher accepts Medicare assignment.
Does Dr. William Stephen Maher offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Maher as offering telehealth services.
How many Medicare patients does Dr. William Stephen Maher see?
CMS counts 455 Medicare patients who saw Dr. Maher in 2024, with an average age of 76.
Show 5 more questionsShow fewer questions
What services does Dr. William Stephen Maher bill to Medicare?
In 2024, Dr. Maher's most billed Medicare services were office visit, established patient (99214), medicare service (G0439) and medicare service (G2211).
Where did Dr. William Stephen Maher go to medical school?
Dr. Maher graduated from Georgetown University School of Medicine in 1991.
What drugs does Dr. William Stephen Maher prescribe most?
In 2024 Medicare Part D data, Dr. Maher's most prescribed drugs by claims were Atorvastatin Calcium, Lisinopril and Amlodipine Besylate.
Has Dr. William Stephen Maher received payments from drug or device companies?
CMS Open Payments shows $88 in general payments to Dr. Maher from 2 companies from 2019 to 2025. The largest total came from Boston Scientific Corporation.
How long has Dr. William Stephen Maher been practicing?
Dr. Maher graduated from medical school in 1991, 35 years ago.
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