ElectrophysiologyHand StrengthMacaca mulatta
Dr. Steve G. Massaquoi, MD, PhD
NPI1811934813PAC ID9436168143
- Medicare services, 2024
- 160
- Medicare patients, 2024
- 172
- Part D claims, 2022
- 12
- Publications
- 1
- Hospital affiliations
- 3
- Practice address
- 41 Highland Avenue, Winchester, MA 01890
- Practice phone
- Call (781) 729-9000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Massaquoi's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Steve G. Massaquoi is a neurologist in Winchester, Massachusetts
Dr. Massaquoi practices at Winchester Hospital in Winchester, Massachusetts, part of Beth Israel Lahey Health.
Dr. Massaquoi's NPI, 1811934813, was assigned on May 31, 2006. Dr. Massaquoi graduated from Harvard Medical School in 1983. Dr. Massaquoi holds Massachusetts license 56107.
NPI and contact details
- NPI
- 1811934813NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9436168143
- NPI enumeration date
- May 31, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (781) 729-9000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 69
- Medical school graduation
- 1983
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Steve G. Massaquoi practices at Winchester Hospital in Winchester, Massachusetts
Dr. Massaquoi's primary practice is Winchester Hospital, at 41 Highland Avenue, Winchester, MA 01890 in Middlesex County. The practice phone is (781) 729-9000.
- Winchester Hospital41 Highland Avenue, Winchester, MA 01890 · Middlesex CountyPhone(781) 729-9000
Source: Dmand AI Affiliation Data
Dr. Steve G. Massaquoi is affiliated with 3 sites of care and 8 medical groups
Dr. Massaquoi's primary practice is Winchester Hospital in Winchester, Massachusetts, part of Beth Israel Lahey Health. Dr. Massaquoi is also affiliated with Massachusetts General Hospital. The medical group on file is Massachusetts General Physicians Organization (MGPO). Dmand AI also links Dr. Massaquoi to 1 more hospital and 7 medical groups, each named with a free account.
Massachusetts General HospitalMassachusetts General Physicians Organization (MGPO)1 hospitalName with a free account7 medical groupsNames with a free account
See all 11 affiliations for Dr. MassaquoiSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Steve G. Massaquoi's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Massaquoi practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Winchester Hospital | Available with a free account |
| +2 more sites and 7 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Dr. Steve G. Massaquoi is one of 806 neurologists in Massachusetts
Neurology is Dr. Massaquoi's primary specialty in the NPI Registry, under taxonomy code 2084N0400X. Dr. Massaquoi is licensed in Massachusetts.
Specialties and state licenses
- Neurology, MassachusettsPrimary
Neurologists near Dr. Massaquoi
Counts of neurologists 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. Steve G. Massaquoi billed Medicare for 160 services in 2024
CMS data shows 160 Medicare services from Dr. Massaquoi across 2 procedure codes in 2024, for 172 Medicare patients. Medicare paid $19,672 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 2024160
Medicare patients172
Paid by Medicare$19,672
Procedure codes2
Dr. Massaquoi's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1552024: 1603%
Dr. Massaquoi compared with the Massachusetts median for neurologists, 2024
- Dr. Massaquoi
- Massachusetts median
- Medicare services
- 160vs 31449% below
- Medicare patients
- 172vs 178Close to median
- Part D claims
- 12vs 27096% below
Medians across 741 neurologists in Massachusetts with Dmand AI profiles that report each measure.
Dr. Massaquoi'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.
Need commercial claims for Dr. Massaquoi?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Massaquoi and other neurologists in Massachusetts.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Steve G. Massaquoi treated 172 Medicare patients in 2024, average age 78
CMS counts 172 Medicare patients who saw Dr. Massaquoi in 2024. The largest group is 75 to 84, with 72 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 26% are also on Medicaid. Their average risk score is 1.97, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Massaquoi's median patient age at 74, with 58% women.
Medicare patients, 2024172
Average age78
Average risk score1.97
Also on Medicaid26%
Dr. Massaquoi's Medicare patients by age, 2024
Dr. Massaquoi's Medicare patients by sex, 2024
- Women11165%
- Men6135%
Chronic conditions among Dr. Massaquoi's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Stroke or TIA65%
- Arthritis63%
- Mood disorders51%
- Anxiety50%
- Chronic kidney disease42%
- Depression42%
Share of Medicare patients with each condition. A patient can have several.
Dr. Massaquoi's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 74
Patient panel by sex, all payers
- Women58%
- Men42%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Steve G. Massaquoi wrote 12 Medicare Part D claims in 2022
In 2022, Dr. Massaquoi wrote 12 Medicare Part D claims. Every claim was for a generic drug. They cover 1 drug, with $604 in total drug cost. In 2021, CMS named 168 claims across 8 drugs.
Part D claims, 202212
Drugs named by CMS1
Total drug cost$604
Dr. Massaquoi's most prescribed drugs by claims, 2022
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, 2021 to 2022
- 2021
- 2022
- Claims for drugs CMS names
- 2021: 1682022: 1293%
Drugs named by CMS: 1 in 2022, 8 in 2021.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
How Dr. Steve G. Massaquoi takes part in Medicare
Dr. Massaquoi accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Steve G. Massaquoi has 1 publication on record
Dmand AI links 1 paper to Dr. Massaquoi.
Papers1
Recent publications by Dr. Massaquoi
See who Dr. Massaquoi researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Massaquoi works with, so you can find a warm path to the right neurologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Steve G. Massaquoi received $30 in industry payments in 2018
CMS Open Payments shows 1 general payment to Dr. Massaquoi from 1 drug or device company in 2018. Food and beverage make up the largest share, 100% of the total. LifeScan, Inc. paid the most, $30.
Companies that paid Dr. Massaquoi the most, 2018 to 2018
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Steve G. Massaquoi graduated from Harvard Medical School
Dr. Massaquoi graduated from Harvard Medical School in 1983.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Steve G. Massaquoi'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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (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. Steve G. Massaquoi
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. Steve G. Massaquoi's NPI number?
Dr. Steve G. Massaquoi's NPI number is 1811934813. It was assigned on May 31, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Steve G. Massaquoi?
Dr. Steve G. Massaquoi is a neurologist in Winchester, Massachusetts. The primary specialty in the NPI Registry is Neurology Physician (taxonomy code 2084N0400X).
Where does Dr. Steve G. Massaquoi practice?
Dr. Massaquoi practices at 41 Highland Avenue, Winchester, MA 01890. Dr. Massaquoi's primary practice is Winchester Hospital in Winchester, Massachusetts, part of Beth Israel Lahey Health. Dmand AI also links Dr. Massaquoi to 1 hospital and 7 medical groups.
What is Dr. Steve G. Massaquoi's office phone number?
The practice phone on file for Dr. Massaquoi is (781) 729-9000.
What is Dr. Steve G. Massaquoi's medical license number?
Dr. Massaquoi holds Massachusetts license 56107.
Which hospitals is Dr. Steve G. Massaquoi affiliated with?
Dr. Massaquoi practices at Winchester Hospital in Winchester, Massachusetts. Dr. Massaquoi is also affiliated with Massachusetts General Hospital. Dmand AI links Dr. Massaquoi to 1 more hospital.
What medical group is Dr. Steve G. Massaquoi part of?
Dr. Massaquoi is linked to Massachusetts General Physicians Organization (MGPO). Dmand AI links Dr. Massaquoi to 7 more medical groups.
Does Dr. Steve G. Massaquoi accept Medicare?
Yes. CMS data shows Dr. Massaquoi billed Medicare for 160 services in 2024, and Dr. Massaquoi accepts Medicare assignment.
How many Medicare patients does Dr. Steve G. Massaquoi see?
CMS counts 172 Medicare patients who saw Dr. Massaquoi in 2024, with an average age of 78.
What services does Dr. Steve G. Massaquoi bill to Medicare?
In 2024, Dr. Massaquoi's most billed Medicare services were hospital inpatient care (99223) and hospital inpatient care (99233).
Show 5 more questionsShow fewer questions
Where did Dr. Steve G. Massaquoi go to medical school?
Dr. Massaquoi graduated from Harvard Medical School in 1983.
What drugs does Dr. Steve G. Massaquoi prescribe most?
In 2022 Medicare Part D data, Dr. Massaquoi's most prescribed drugs by claims were Levetiracetam.
Has Dr. Steve G. Massaquoi received payments from drug or device companies?
CMS Open Payments shows $30 in general payments to Dr. Massaquoi from 1 company from 2018 to 2018. The largest total came from LifeScan, Inc.
How long has Dr. Steve G. Massaquoi been practicing?
Dr. Massaquoi graduated from medical school in 1983, 43 years ago.
Does Dr. Steve G. Massaquoi do research?
Dmand AI links 1 publication to Dr. Massaquoi.
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