Dr. Simon M. W. M W Lejeune, MD
- Medicare services, 2024
- 70
- Medicare patients, 2024
- 14
- Part D claims, 2024
- 987
- MIPS score, 2024
- 91
- Hospital affiliations
- 1
- Practice address
- 1493 Cambridge Street, Cambridge, MA 02139
- Practice phone
- Call (617) 665-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Lejeune's professional email, personal email and mobile number
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Dr. Simon M. W. M W Lejeune is a psychiatrist in Cambridge, Massachusetts
Dr. Lejeune practices at CHA Cambridge Hospital in Cambridge, Massachusetts, part of Cambridge Health Alliance.
Dr. Lejeune's NPI, 1821035403, was assigned on June 1, 2006. Dr. Lejeune graduated from Harvard Medical School in 1985. Dr. Lejeune holds Massachusetts license 56687.
- NPI
- 1821035403NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1759438476
- NPI enumeration date
- June 1, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (617) 665-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 67
- Medical school graduation
- 1985
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Simon M. W. M W Lejeune practices at CHA Cambridge Hospital in Cambridge, Massachusetts
Dr. Lejeune's primary practice is CHA Cambridge Hospital, at 1493 Cambridge Street, Cambridge, MA 02139 in Middlesex County. The practice phone is (617) 665-1000.
- CHA Cambridge Hospital1493 Cambridge Street, Cambridge, MA 02139 · Middlesex CountyPhone(617) 665-1000
Source: Dmand AI Affiliation Data
Dr. Simon M. W. M W Lejeune is affiliated with 1 site of care and 1 medical group
Dr. Lejeune's primary practice is CHA Cambridge Hospital in Cambridge, Massachusetts, part of Cambridge Health Alliance. The medical group on file is Cambridge Health Alliance. Dr. Lejeune's employer is on file too: a hospital.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Simon M. W. M W Lejeune's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Lejeune practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| CHA Cambridge Hospital | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Simon M. W. M W Lejeune is one of 1,857 psychiatrists in Massachusetts
Psychiatry is Dr. Lejeune's primary specialty in the NPI Registry, under taxonomy code 2084P0800X. Dr. Lejeune is licensed in Massachusetts.
Specialties and state licenses
- Psychiatry, MassachusettsPrimary
Psychiatrists near Dr. Lejeune
Counts of psychiatrists 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. Simon M. W. M W Lejeune billed Medicare for 70 services in 2024
CMS data shows 70 Medicare services from Dr. Lejeune across 1 procedure code in 2024, all of them office visits, for 14 Medicare patients. Medicare paid $5,106 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Lejeune's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 772024: 709%
Dr. Lejeune compared with the Massachusetts median for psychiatrists, 2024
- Dr. Lejeune
- Massachusetts median
- Medicare services
- 70vs 17259% below
- Medicare patients
- 14vs 4267% below
- Part D claims
- 882vs 929.6 times
Medians across 2,056 psychiatrists in Massachusetts with Dmand AI profiles that report each measure.
Dr. Lejeune'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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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Simon M. W. M W Lejeune treated 14 Medicare patients in 2024, average age 52
CMS counts 14 Medicare patients who saw Dr. Lejeune in 2024. 75% of them have anxiety, and 75% have mood disorders. Their average risk score is 1.00, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Lejeune's median patient age at 38, with 52% women.
Chronic conditions among Dr. Lejeune's Medicare patients, 2024
- Anxiety75%
- Mood disorders75%
Share of Medicare patients with each condition. A patient can have several.
Dr. Lejeune's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 38
Patient panel by sex, all payers
- Women52%
- Men46%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Simon M. W. M W Lejeune wrote 987 Medicare Part D claims in 2024
In 2024, Dr. Lejeune wrote 987 Medicare Part D claims for 56 patients. 96% of them were for generic drugs. CMS names the drug for 882 of them, across 31 drugs with 11 or more claims each, at $58,046 in total drug cost. In 2023, CMS named 1,248 claims across 34 drugs.
Dr. Lejeune's Part D claims by kind of drug, 2024
- Generic946 claims96%
- Brand-name41 claims4%
Dr. Lejeune'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. Lejeune's Part D claims, 2024
- Antipsychotics, patients 65 and over2%18 of 987 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: 1,2482024: 88229%
Drugs named by CMS: 31 in 2024, 34 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. Simon M. W. M W Lejeune scored 91 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 91 out of 100 for Dr. Lejeune for performance year 2024, reported as part of a group. Dr. Lejeune accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Lejeune's MIPS scores, performance year 2024
- 91of 100Final score
- 77.5of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 77of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Simon M. W. M W Lejeune graduated from Harvard Medical School
Dr. Lejeune graduated from Harvard Medical School in 1985.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Simon M. W. M W Lejeune'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)Clinician Public Reporting: Overall MIPS Performance (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. Simon M. W. M W Lejeune
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. Simon M. W. M W Lejeune's NPI number?
Dr. Simon M. W. M W Lejeune's NPI number is 1821035403. It was assigned on June 1, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Simon M. W. M W Lejeune?
Dr. Simon M. W. M W Lejeune is a psychiatrist in Cambridge, Massachusetts. The primary specialty in the NPI Registry is Psychiatry Physician (taxonomy code 2084P0800X).
Where does Dr. Simon M. W. M W Lejeune practice?
Dr. Lejeune practices at 1493 Cambridge Street, Cambridge, MA 02139. Dr. Lejeune's primary practice is CHA Cambridge Hospital in Cambridge, Massachusetts, part of Cambridge Health Alliance.
What is Dr. Simon M. W. M W Lejeune's office phone number?
The practice phone on file for Dr. Lejeune is (617) 665-1000.
What is Dr. Simon M. W. M W Lejeune's medical license number?
Dr. Lejeune holds Massachusetts license 56687.
Which hospitals is Dr. Simon M. W. M W Lejeune affiliated with?
Dr. Lejeune practices at CHA Cambridge Hospital in Cambridge, Massachusetts.
What medical group is Dr. Simon M. W. M W Lejeune part of?
Dr. Lejeune is linked to Cambridge Health Alliance.
Does Dr. Simon M. W. M W Lejeune accept Medicare?
Yes. CMS data shows Dr. Lejeune billed Medicare for 70 services in 2024, and Dr. Lejeune accepts Medicare assignment.
What is Dr. Simon M. W. M W Lejeune's MIPS score?
Dr. Lejeune's MIPS final score for performance year 2024 is 91 out of 100, reported as part of a group.
How many Medicare patients does Dr. Simon M. W. M W Lejeune see?
CMS counts 14 Medicare patients who saw Dr. Lejeune in 2024, with an average age of 52.
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What services does Dr. Simon M. W. M W Lejeune bill to Medicare?
In 2024, Dr. Lejeune's most billed Medicare services were office visit, established patient (99214).
Where did Dr. Simon M. W. M W Lejeune go to medical school?
Dr. Lejeune graduated from Harvard Medical School in 1985.
What drugs does Dr. Simon M. W. M W Lejeune prescribe most?
In 2024 Medicare Part D data, Dr. Lejeune's most prescribed drugs by claims were Risperidone, Clonidine HCl and Clozapine.
How long has Dr. Simon M. W. M W Lejeune been practicing?
Dr. Lejeune graduated from medical school in 1985, 41 years ago.
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