Dr. Richard Michael Louissaint, MD
- Medicare services, 2024
- 147
- Medicare patients, 2024
- 152
- Part D claims, 2024
- 76
- MIPS score, 2024
- 91
- Hospital affiliations
- 2
- 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. Louissaint'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. Richard Michael Louissaint is an emergency medicine physician in Cambridge, Massachusetts
Dr. Louissaint practices at CHA Cambridge Hospital in Cambridge, Massachusetts, part of Cambridge Health Alliance.
Dr. Louissaint's NPI, 1629331087, was assigned on June 20, 2012. Dr. Louissaint graduated from Howard University College of Medicine in 2012. Dr. Louissaint holds Massachusetts license 1013821.
- NPI
- 1629331087NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3173844388
- NPI enumeration date
- June 20, 2012
- 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
- 40
- Medical school graduation
- 2012
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Richard Michael Louissaint practices at CHA Cambridge Hospital in Cambridge, Massachusetts
Dr. Louissaint'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. Richard Michael Louissaint is affiliated with 2 sites of care and 3 medical groups
Dr. Louissaint's primary practice is CHA Cambridge Hospital in Cambridge, Massachusetts, part of Cambridge Health Alliance. Dr. Louissaint is also affiliated with Merrimack Health Lawrence Hospital. The medical group on file is Cambridge Health Alliance. Dmand AI also links Dr. Louissaint to 2 more medical groups, 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. Richard Michael Louissaint's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Louissaint practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| CHA Cambridge Hospital | Available with a free account |
| +1 more site and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Richard Michael Louissaint is one of 1,483 emergency medicine physicians in Massachusetts
Emergency medicine is Dr. Louissaint's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dmand AI has Dr. Louissaint's licenses on file in 2 states: Massachusetts and Illinois.
Specialties and state licenses
- Emergency medicine, MassachusettsPrimary
- Illinois license
Emergency medicine physicians near Dr. Louissaint
Counts of emergency medicine physicians 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. Richard Michael Louissaint billed Medicare for 147 services in 2024
CMS data shows 147 Medicare services from Dr. Louissaint across 4 procedure codes in 2024, for 152 Medicare patients. Medicare paid $16,737 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Louissaint's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1752024: 14716%
Dr. Louissaint compared with the Massachusetts median for emergency medicine physicians, 2024
- Dr. Louissaint
- Massachusetts median
- Medicare services
- 147vs 34157% below
- Medicare patients
- 152vs 33755% below
- Part D claims
- 11vs 3669% below
Medians across 1,477 emergency medicine physicians in Massachusetts with Dmand AI profiles that report each measure.
Dr. Louissaint'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. Louissaint and other emergency medicine physicians in Massachusetts.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Richard Michael Louissaint treated 152 Medicare patients in 2024, average age 69
CMS counts 152 Medicare patients who saw Dr. Louissaint in 2024. The largest group is 65 to 74, with 51 patients. 75% of them have high blood pressure, and 68% have high cholesterol. 63% are also on Medicaid. Their average risk score is 1.89, 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. Louissaint's median patient age at 41, with 54% women.
Dr. Louissaint's Medicare patients by age, 2024
Dr. Louissaint's Medicare patients by sex, 2024
- Women7851%
- Men7449%
Chronic conditions among Dr. Louissaint's Medicare patients, 2024
- High blood pressure75%
- High cholesterol68%
- Anxiety57%
- Mood disorders50%
- Depression45%
- Diabetes41%
- Arthritis40%
- Ischemic heart disease40%
Share of Medicare patients with each condition. A patient can have several.
Dr. Louissaint's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 41
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. Richard Michael Louissaint wrote 76 Medicare Part D claims in 2024
In 2024, Dr. Louissaint wrote 76 Medicare Part D claims for 63 patients. 95% of them were for generic drugs. CMS names the drug for 11 of them, across 1 drug with 11 or more claims each, at $29 in total drug cost. In 2022, CMS named 15 claims across 1 drug.
Dr. Louissaint's Part D claims by kind of drug, 2024
- Generic72 claims95%
- Brand-name and other4 claims5%
Dr. Louissaint's most prescribed drugs by claims, 2023
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. Louissaint's Part D claims, 2024
- Opioids14%11 of 76 claims
- Antibiotics26%20 of 76 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, 2022 to 2023
- 2022
- 2023
- Claims for drugs CMS names
- 2022: 152023: 1127%
Drugs named by CMS: 1 in 2023, 1 in 2022.
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. Richard Michael Louissaint 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. Louissaint for performance year 2024, reported as part of a group. Dr. Louissaint accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Louissaint'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. Richard Michael Louissaint received $39 in industry payments in 2022
CMS Open Payments shows 1 general payment to Dr. Louissaint from 1 drug or device company in 2022. Food and beverage make up the largest share, 100% of the total. Janssen Pharmaceuticals, Inc paid the most, $39.
Companies that paid Dr. Louissaint the most, 2022 to 2022
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Richard Michael Louissaint graduated from Howard University College of Medicine
Dr. Louissaint graduated from Howard University College of Medicine in 2012.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Richard Michael Louissaint'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) |
| 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. Richard Michael Louissaint
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. Richard Michael Louissaint's NPI number?
Dr. Richard Michael Louissaint's NPI number is 1629331087. It was assigned on June 20, 2012, and it is active in the NPI Registry.
What kind of doctor is Dr. Richard Michael Louissaint?
Dr. Richard Michael Louissaint is an emergency medicine physician in Cambridge, Massachusetts. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Richard Michael Louissaint practice?
Dr. Louissaint practices at 1493 Cambridge Street, Cambridge, MA 02139. Dr. Louissaint's primary practice is CHA Cambridge Hospital in Cambridge, Massachusetts, part of Cambridge Health Alliance. Dmand AI also links Dr. Louissaint to 2 medical groups.
What is Dr. Richard Michael Louissaint's office phone number?
The practice phone on file for Dr. Louissaint is (617) 665-1000.
What is Dr. Richard Michael Louissaint's medical license number?
Dr. Louissaint holds Massachusetts license 1013821, one of the licenses on file in 2 states.
Which states has Dr. Richard Michael Louissaint been licensed in?
Dmand AI has state licenses on file for Dr. Louissaint in Massachusetts and Illinois.
Which hospitals is Dr. Richard Michael Louissaint affiliated with?
Dr. Louissaint practices at CHA Cambridge Hospital in Cambridge, Massachusetts. Dr. Louissaint is also affiliated with Merrimack Health Lawrence Hospital.
What medical group is Dr. Richard Michael Louissaint part of?
Dr. Louissaint is linked to Cambridge Health Alliance. Dmand AI links Dr. Louissaint to 2 more medical groups.
Does Dr. Richard Michael Louissaint accept Medicare?
Yes. CMS data shows Dr. Louissaint billed Medicare for 147 services in 2024, and Dr. Louissaint accepts Medicare assignment.
What is Dr. Richard Michael Louissaint's MIPS score?
Dr. Louissaint's MIPS final score for performance year 2024 is 91 out of 100, reported as part of a group.
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How many Medicare patients does Dr. Richard Michael Louissaint see?
CMS counts 152 Medicare patients who saw Dr. Louissaint in 2024, with an average age of 69.
What services does Dr. Richard Michael Louissaint bill to Medicare?
In 2024, Dr. Louissaint's most billed Medicare services were emergency department visit (99284), emergency department visit (99285) and emergency department visit (99283).
Where did Dr. Richard Michael Louissaint go to medical school?
Dr. Louissaint graduated from Howard University College of Medicine in 2012.
What drugs does Dr. Richard Michael Louissaint prescribe most?
In 2023 Medicare Part D data, Dr. Louissaint's most prescribed drugs by claims were Prednisone.
Has Dr. Richard Michael Louissaint received payments from drug or device companies?
CMS Open Payments shows $39 in general payments to Dr. Louissaint from 1 company from 2022 to 2022. The largest total came from Janssen Pharmaceuticals, Inc.
How long has Dr. Richard Michael Louissaint been practicing?
Dr. Louissaint graduated from medical school in 2012, 14 years ago.
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