Dr. Allison Ensign Larusso, MD
- Medicare services, 2024
- 274
- Medicare patients, 2024
- 267
- Part D claims, 2024
- 98
- MIPS score, 2024
- 100
- Hospital affiliations
- 3
- Practice address
- 55 North Ave, Mendon, MA 01756
- Practice phone
- Call (508) 334-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Umass Memorial Medical Center
Mendon, Massachusetts
Find Dr. Larusso'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. Allison Ensign Larusso is an emergency medicine physician in Mendon, Massachusetts
Dr. Larusso practices at Umass Memorial Medical Center in Mendon, Massachusetts.
Dr. Larusso's NPI, 1396728333, was assigned on November 23, 2005. Dr. Larusso graduated from University of Massachusetts Medical School in 1999. Dr. Larusso holds Massachusetts license 213743.
- NPI
- 1396728333NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7214013598
- NPI enumeration date
- November 23, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (508) 334-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 53
- Medical school graduation
- 1999
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Allison Ensign Larusso practices at Umass Memorial Medical Center in Mendon, Massachusetts
Dr. Larusso's primary practice is Umass Memorial Medical Center, at 55 North Ave, Mendon, MA 01756 in Worcester County. The practice phone is (508) 334-1000.
- Umass Memorial Medical Center55 North Ave, Mendon, MA 01756 · Worcester CountyPhone(508) 334-1000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Allison Ensign Larusso is affiliated with 4 sites of care and 1 medical group
Dr. Larusso's primary practice is Umass Memorial Medical Center in Mendon, Massachusetts. Dr. Larusso is also affiliated with UMass Memorial Medical Center - University Campus. The medical group on file is UMass Memorial Medical Group. Dmand AI also links Dr. Larusso to 2 more hospitals, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Allison Ensign Larusso's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Larusso practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Umass Memorial Medical Center | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Allison Ensign Larusso is one of 1,483 emergency medicine physicians in Massachusetts
Emergency medicine is Dr. Larusso's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Larusso is licensed in Massachusetts.
Specialties and state licenses
- Emergency medicine, MassachusettsPrimary
Emergency medicine physicians near Dr. Larusso
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. Allison Ensign Larusso billed Medicare for 274 services in 2024
CMS data shows 274 Medicare services from Dr. Larusso across 4 procedure codes in 2024, for 267 Medicare patients. Medicare paid $29,536 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Larusso's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2332024: 27418%
Dr. Larusso compared with the Massachusetts median for emergency medicine physicians, 2024
- Dr. Larusso
- Massachusetts median
- Medicare services
- 274vs 34120% below
- Medicare patients
- 267vs 33721% below
- Part D claims
- 12vs 3667% below
Medians across 1,477 emergency medicine physicians in Massachusetts with Dmand AI profiles that report each measure.
Dr. Larusso'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. Larusso 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. Allison Ensign Larusso treated 267 Medicare patients in 2024, average age 73
CMS counts 267 Medicare patients who saw Dr. Larusso in 2024. The largest group is 75 to 84, with 85 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 39% are also on Medicaid. Their average risk score is 2.02, 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. Larusso's median patient age at 61, with 57% women.
Dr. Larusso's Medicare patients by age, 2024
Dr. Larusso's Medicare patients by sex, 2024
- Women15157%
- Men11643%
Chronic conditions among Dr. Larusso's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Anxiety49%
- Arthritis48%
- Mood disorders47%
- Depression45%
- Chronic kidney disease40%
- Ischemic heart disease39%
Share of Medicare patients with each condition. A patient can have several.
Dr. Larusso's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 61
Patient panel by sex, all payers
- Women57%
- Men43%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Allison Ensign Larusso wrote 98 Medicare Part D claims in 2024
In 2024, Dr. Larusso wrote 98 Medicare Part D claims for 80 patients. 89% of them were for generic drugs. CMS names the drug for 12 of them, across 1 drug with 11 or more claims each, at $56 in total drug cost. In 2022, CMS named 11 claims across 1 drug.
Dr. Larusso's Part D claims by kind of drug, 2024
- Generic87 claims89%
- Brand-name11 claims11%
Dr. Larusso'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. Larusso's Part D claims, 2024
- Opioids11%11 of 98 claims
- Antibiotics41%40 of 98 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: 112023: 129%
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. Allison Ensign Larusso scored 100 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 100 out of 100 for Dr. Larusso for performance year 2024, reported through an alternative payment model (APM). Dr. Larusso accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Larusso's MIPS scores, performance year 2024
- 100of 100Final score
- 83of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
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. Allison Ensign Larusso received $64 in industry payments in 2025
CMS Open Payments shows 2 general payments to Dr. Larusso from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. Mayne Pharma Inc. paid the most, $64.
Companies that paid Dr. Larusso the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Allison Ensign Larusso graduated from University of Massachusetts Medical School
Dr. Larusso graduated from University of Massachusetts Medical School in 1999.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Allison Ensign Larusso'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 |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand 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. Allison Ensign Larusso
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. Allison Ensign Larusso's NPI number?
Dr. Allison Ensign Larusso's NPI number is 1396728333. It was assigned on November 23, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Allison Ensign Larusso?
Dr. Allison Ensign Larusso is an emergency medicine physician in Mendon, Massachusetts. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Allison Ensign Larusso practice?
Dr. Larusso practices at 55 North Ave, Mendon, MA 01756. Dr. Larusso's primary practice is Umass Memorial Medical Center in Mendon, Massachusetts. Dmand AI also links Dr. Larusso to 2 hospitals.
What is Dr. Allison Ensign Larusso's office phone number?
The practice phone on file for Dr. Larusso is (508) 334-1000.
What is Dr. Allison Ensign Larusso's medical license number?
Dr. Larusso holds Massachusetts license 213743.
Which hospitals is Dr. Allison Ensign Larusso affiliated with?
Dr. Larusso is affiliated with UMass Memorial Medical Center - University Campus. Dmand AI links Dr. Larusso to 2 more hospitals.
What medical group is Dr. Allison Ensign Larusso part of?
Dr. Larusso is linked to UMass Memorial Medical Group.
Does Dr. Allison Ensign Larusso accept Medicare?
Yes. CMS data shows Dr. Larusso billed Medicare for 274 services in 2024, and Dr. Larusso accepts Medicare assignment.
What is Dr. Allison Ensign Larusso's MIPS score?
Dr. Larusso's MIPS final score for performance year 2024 is 100 out of 100, reported through an alternative payment model (APM).
How many Medicare patients does Dr. Allison Ensign Larusso see?
CMS counts 267 Medicare patients who saw Dr. Larusso in 2024, with an average age of 73.
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What services does Dr. Allison Ensign Larusso bill to Medicare?
In 2024, Dr. Larusso's most billed Medicare services were emergency department visit (99284), emergency department visit (99285) and emergency department visit (99283).
Where did Dr. Allison Ensign Larusso go to medical school?
Dr. Larusso graduated from University of Massachusetts Medical School in 1999.
What drugs does Dr. Allison Ensign Larusso prescribe most?
In 2023 Medicare Part D data, Dr. Larusso's most prescribed drugs by claims were Cephalexin.
Has Dr. Allison Ensign Larusso received payments from drug or device companies?
CMS Open Payments shows $64 in general payments to Dr. Larusso from 1 company from 2025 to 2025. The largest total came from Mayne Pharma Inc.
How long has Dr. Allison Ensign Larusso been practicing?
Dr. Larusso graduated from medical school in 1999, 27 years ago.
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