Health Serv Res
Emergency Service, HospitalFee-for-Service PlansHealth Services Research
Dr. John Michael McWilliams, MD
NPI1366408411
- Medicare services, 2022
- 48
- Part D claims, 2020
- 85
- Publications
- 2
- State license
- 1
- Year NPI issued
- 2006
- Practice address
- 75 Francis St, Boston, MA 02115
- Practice phone
- Call (617) 732-6040
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
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Dr. John Michael McWilliams is an internist in Boston, Massachusetts
Dr. McWilliams practices in Boston, Massachusetts.
Dr. McWilliams' NPI, 1366408411, was assigned on April 25, 2006. Dr. McWilliams graduated from Harvard Medical School in 2003. Dr. McWilliams holds Massachusetts license 223922.
NPI and contact details
- NPI
- 1366408411NPI Registry (opens in a new tab)
- NPI enumeration date
- April 25, 2006
- NPI status
- Active
- Practice phone
- (617) 732-6040
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 49
- Medical school graduation
- 2003
Sources: NPPES NPI Registry (CMS); and Dmand AI Professional Profile Data
Dr. John Michael McWilliams' practice address is in Boston, Massachusetts
Dr. McWilliams' practice address in the NPI Registry is 75 Francis St, Boston, MA 02115, in Suffolk County. The practice phone is (617) 732-6040.
- NPI Registry address75 Francis St, Boston, MA 02115 · Suffolk CountyPhone(617) 732-6040
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dmand AI tracks the EHR system at Dr. John Michael McWilliams' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. McWilliams practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dr. McWilliams' practice | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John Michael McWilliams is one of 5,528 internists in Massachusetts
Internal medicine is Dr. McWilliams' primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. McWilliams is licensed in Massachusetts.
Specialties and state licenses
- Internal medicine, MassachusettsPrimary
Internists near Dr. McWilliams
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. John Michael McWilliams billed Medicare for 48 services in 2022
CMS data shows 48 Medicare services from Dr. McWilliams across 1 procedure code in 2022, all of them office visits. Medicare paid $3,731 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 202248
Paid by Medicare$3,731
Procedure codes1
Dr. McWilliams' Medicare services by type, 2021 to 2022
- 2021
- 2022
- Office and hospital visits
- 2021: 382022: 4826%
Dr. McWilliams compared with the Massachusetts median for internists, 2022
- Dr. McWilliams
- Massachusetts median
- Medicare services
- 48vs 43189% below
- Part D claims
- 85vs 40279% below
Medians across 5,369 internists in Massachusetts with Dmand AI profiles that report each measure.
Dr. McWilliams' most billed Medicare procedure codes, 2022
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. McWilliams and other internists in Massachusetts.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John Michael McWilliams' patients have a median age of 55
Across all payers, Dmand AI patient panel data puts Dr. McWilliams' median patient age at 55, with 33% women.
Dr. McWilliams' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 55
Patient panel by sex, all payers
- Women33%
- Men67%
Source: Dmand AI Patient Panel Data
Dr. John Michael McWilliams wrote 85 Medicare Part D claims in 2020
In 2020, Dr. McWilliams wrote 85 Medicare Part D claims. Every claim was for a generic drug. They cover 5 drugs, with $988 in total drug cost. In 2019, CMS named 979 claims across 34 drugs.
Part D claims, 202085
Drugs named by CMS5
Total drug cost$988
Dr. McWilliams' most prescribed drugs by claims, 2020
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2019 to 2020
- 2019
- 2020
- Claims for drugs CMS names
- 2019: 9792020: 8591%
Drugs named by CMS: 5 in 2020, 34 in 2019.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. John Michael McWilliams has 2 publications on record
Dmand AI links 2 papers to Dr. McWilliams in 2021. The most frequent topics are Fee-for-Service Plans and Medicare. Dr. McWilliams' most frequent co-authors are Nancy Lynn Keating, MD, Hazar H. Khidir, MD and Barbara Jane McNeil, MD, PhD.
Papers2
Topics Dr. McWilliams writes about most
- Fee-for-Service Plans
- Medicare
Dr. McWilliams' most frequent co-authors
- Nancy Lynn Keating, MD1 shared paper
- Hazar H. Khidir, MD1 shared paper
- Barbara Jane McNeil, MD, PhD1 shared paper
Recent publications by Dr. McWilliams
Med Care
Antineoplastic Agents, ImmunologicalBevacizumabFee-for-Service Plans
See who Dr. McWilliams researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. McWilliams works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. John Michael McWilliams graduated from Harvard Medical School
Dr. McWilliams graduated from Harvard Medical School in 2003.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. John Michael McWilliams'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 Practice 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 Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (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 |
| 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. John Michael McWilliams
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. John Michael McWilliams' NPI number?
Dr. John Michael McWilliams' NPI number is 1366408411. It was assigned on April 25, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John Michael McWilliams?
Dr. John Michael McWilliams is an internist in Boston, Massachusetts. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. John Michael McWilliams practice?
Dr. McWilliams practices at 75 Francis St, Boston, MA 02115.
What is Dr. John Michael McWilliams' office phone number?
The practice phone on file for Dr. McWilliams is (617) 732-6040.
What is Dr. John Michael McWilliams' medical license number?
Dr. McWilliams holds Massachusetts license 223922.
Does Dr. John Michael McWilliams accept Medicare?
Yes. CMS data shows Dr. McWilliams billed Medicare for 48 services in 2022.
What services does Dr. John Michael McWilliams bill to Medicare?
In 2022, Dr. McWilliams' most billed Medicare services were office visit, established patient (99214).
Where did Dr. John Michael McWilliams go to medical school?
Dr. McWilliams graduated from Harvard Medical School in 2003.
What drugs does Dr. John Michael McWilliams prescribe most?
In 2020 Medicare Part D data, Dr. McWilliams' most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Lisinopril.
How long has Dr. John Michael McWilliams been practicing?
Dr. McWilliams graduated from medical school in 2003, 23 years ago.
Does Dr. John Michael McWilliams do research?
Dmand AI links 2 publications to Dr. McWilliams.
Who does Dr. John Michael McWilliams publish with?
Dr. McWilliams' most frequent co-authors are Nancy Lynn Keating, MD (1 shared paper), Hazar H. Khidir, MD (1 shared paper) and Barbara Jane McNeil, MD, PhD (1 shared paper).
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