Dr. Fabrizio Michelassi, MD

  • Greenwich, CT
  • General surgeon
NPI1952316499PAC ID8921076647
Medicare services, 2022
12
Medicare patients, 2024
17
Part D claims, 2024
15
Publications
134
Clinical trials
1
Practice address
5 Perryridge Rd, Greenwich, CT 06830
Practice phone
Call (203) 863-3000
Professional email
Get professional email
Personal email
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Mobile number
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Social profiles

Primary practice

Greenwich Hospital

Hospital · Greenwich, Connecticut

See all 3 affiliations

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Dr. Fabrizio Michelassi is a general surgeon in Greenwich, Connecticut

Dr. Michelassi practices at Greenwich Hospital in Greenwich, Connecticut, part of Yale New Haven Health System.

Dr. Michelassi's NPI, 1952316499, was assigned on July 31, 2006. Dr. Michelassi graduated from University of Pisa Faculty of Medicine in 1975. Dr. Michelassi's New York license number on file is 140048.

NPI and contact details
Medicare PAC ID
8921076647
NPI enumeration date
July 31, 2006
NPI status
Active
Accepts Medicare assignment
Yes
Practice phone
(203) 863-3000
Professional email
Get email
Personal email
Get email
Mobile number
Get number
Sex
Male
Estimated age
77
Medical school graduation
1975

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)

Dr. Fabrizio Michelassi practices at Greenwich Hospital in Greenwich, Connecticut

Dr. Michelassi's primary practice is Greenwich Hospital, at 5 Perryridge Rd, Greenwich, CT 06830 in Fairfield County. The practice phone is (203) 863-3000.

  • Greenwich Hospital
    5 Perryridge Rd, Greenwich, CT 06830 · Fairfield CountyPhone(203) 863-3000

Source: Dmand AI Affiliation Data

Dr. Fabrizio Michelassi is affiliated with 2 sites of care and 1 medical group

Dr. Michelassi's primary practice is Greenwich Hospital in Greenwich, Connecticut, part of Yale New Haven Health System. The medical group on file is Weill Cornell Physicians. Dmand AI also links Dr. Michelassi to 1 more group practice or clinic, named with a free account.

See all 3 affiliations for Dr. Michelassi

Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data

Dmand AI tracks the EHR system at Dr. Fabrizio Michelassi's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Michelassi practices, 2 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Greenwich HospitalAvailable with a free account
+1 more affiliated siteAvailable with a free account

Source: Dmand AI Technology Install Data

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Dr. Fabrizio Michelassi is one of 303 general surgeons in Connecticut

Surgery is Dr. Michelassi's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Michelassi is board certified in surgery by the American Board of Surgery. Dmand AI has Dr. Michelassi's licenses on file in 4 states: New York, Florida, New Jersey and Illinois.

Specialties and state licenses

  • Surgery, New YorkPrimaryLicense 140048 · 1979 to 2025 · taxonomy 208600000X
  • Florida licenseSince 2022
  • New Jersey license2023 to 2027
  • Illinois license1984 to 2008

Clinical focus

Dmand AI lists colon removal and intestinal or bowel obstruction among the conditions Dr. Michelassi treats.

General surgeons near Dr. Michelassi

Counts of general surgeons 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. Fabrizio Michelassi billed Medicare for 12 services in 2022

CMS data shows 12 Medicare services from Dr. Michelassi across 1 procedure code in 2022, all of them office visits, for 17 Medicare patients. Medicare paid $2,471 for them. Every service was in an office.

Medicare services, 202212
Medicare patients17
Paid by Medicare$2,471
Procedure codes1

Dr. Michelassi's Medicare services by type, 2021 to 2022

  • 2021
  • 2022
Office and hospital visits
2021: 112022: 129%

Dr. Michelassi compared with the Connecticut median for general surgeons, 2022

  • Dr. Michelassi
  • Connecticut median
Medicare services
12vs 10989% below
Medicare patients
17vs 9582% below
Part D claims
20vs 2520% below

Medians across 295 general surgeons in Connecticut with Dmand AI profiles that report each measure.

Dr. Michelassi's 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.

See all procedures by Dr. Michelassi

Need commercial claims for Dr. Michelassi?

Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Michelassi and other general surgeons in Connecticut.

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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks

Dr. Fabrizio Michelassi treated 17 Medicare patients in 2024, average age 75

CMS counts 17 Medicare patients who saw Dr. Michelassi in 2024. 75% of them have high cholesterol. Their average risk score is 1.62, 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. Michelassi's median patient age at 54, with 29% women.

Medicare patients, 202417
Average age75
Average risk score1.62

Chronic conditions among Dr. Michelassi's Medicare patients, 2024

  1. High cholesterol75%

Share of Medicare patients with each condition. A patient can have several.

Dr. Michelassi's patients across all payers

Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.

Patient panel by age, all payers

Median age 54

Patient panel by sex, all payers

  • Women29%
  • Men71%

Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data

Dr. Fabrizio Michelassi wrote 15 Medicare Part D claims in 2024

In 2024, Dr. Michelassi wrote 15 Medicare Part D claims. 100% of them were for generic drugs. They cover 1 drug, with $1,392 in total drug cost. In 2022, CMS named 20 claims across 1 drug.

Part D claims, 202415
Drugs named by CMS1
Total drug cost$1,392

Dr. Michelassi'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. Michelassi's Part D claims, 2024

  • Antibiotics80%12 of 15 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: 202023: 20No change

Drugs named by CMS: 1 in 2023, 1 in 2022.

See all prescribing by Dr. Michelassi

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. Fabrizio Michelassi 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. Michelassi for performance year 2024, reported through an alternative payment model (APM). Dr. Michelassi accepts Medicare assignment, so Medicare's approved amount is taken as full payment.

Accepts Medicare assignment
Yes

Dr. Michelassi's MIPS scores, performance year 2024

  • 100of 100Final score
  • 85.3of 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

For MedTech and pharma teams

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Dr. Fabrizio Michelassi has 134 publications on record

Dmand AI links 134 papers to Dr. Michelassi, published from 2007 to 2024. 2016 was the busiest year, with 4. The most frequent topics are Adenocarcinoma, Postoperative Complications and Crohn Disease. Dr. Michelassi has published most often in Ann Surg. Dr. Michelassi's most frequent co-authors are Heather Lynn Yeo, MD, Alessandro Fichera, MD and Richard B. Arenas, MD.

Papers134
Years published2007 to 2024

Dr. Michelassi's papers by year, 2009 to 2024

Topics Dr. Michelassi writes about most

  • Adenocarcinoma
  • Postoperative Complications
  • Crohn Disease
  • Colonic Neoplasms
  • Colorectal Neoplasms
  • Colectomy
  • General Surgery
  • Pancreatic Neoplasms

Dr. Michelassi's most frequent co-authors

Recent publications by Dr. Michelassi

See all 134 publications and co-authors

See who Dr. Michelassi researches with

Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Michelassi works with, so you can find a warm path to the right general surgeons.

How network discovery works

Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage

Dr. Fabrizio Michelassi has worked on 1 clinical trial

Dmand AI links Dr. Michelassi to 1 clinical trial. 1 is still active or recruiting. Conditions studied include Crohn Disease and Inflammatory Bowel Diseases.

Conditions in Dr. Michelassi's trials

  • Crohn Disease
  • Inflammatory Bowel Diseases

Investigators on the most trials with Dr. Michelassi

Recent clinical trials with Dr. Michelassi

Sources: Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)

Dr. Fabrizio Michelassi has 39 awards and honors on record

Dmand AI lists 39 awards for Dr. Michelassi, most recently America's Top Doctors in 2014.

Awards and honors for Dr. Michelassi

  1. 2014
    • America's Top Doctors
    • Faculty Teaching Award, Excellence in Surgical Teaching and Outstanding Commitment to Resident Education, Chief General Surgery Residents of the Department of Surgery
    • New York Magazine: Top Doctors
    • Top Doctors: New York Metro Area
  2. 2013
    • America's Top Doctors for Cancer
    • CMS Stage 1 EHR
See all 39 awards

Source: Dmand AI Professional Profile Data

Dr. Fabrizio Michelassi graduated from University of Pisa Faculty of Medicine

Dr. Michelassi graduated from University of Pisa Faculty of Medicine in 1975. Dr. Michelassi is a member of Academy of Surgical Research, American Board of Surgery, ACS, American Gastroenterologic Association, American Pancreatic Association and American Society of Clinical Oncology.

  1. Medical schoolUniversity of Pisa Faculty of Medicine
  2. Board certified in surgeryAmerican Board of Surgery

Source: Dmand AI Professional Profile Data

Dr. Fabrizio Michelassi accepts plans from 11 insurance carriers

Dr. Michelassi is in network with 11 carriers, including Aetna, Excellus BlueCross BlueShield and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 9. Check the plan with the practice before a visit.

  • Aetna
  • Excellus BlueCross BlueShield
  • Blue Cross Blue Shield of Michigan
  • Elevance
  • Blue Cross Blue Shield of Massachusetts
  • Cigna
  • HCSC
  • Regence Health Plans
  • +3 more carriersWith a free account

Plan types Dr. Michelassi accepts, by number of carriers

  1. Medicare9
  2. PPO7
  3. HMO3
  4. POS3
  5. EPO2
  6. Medicaid2

Source: Dmand AI Insurance Network Data

Sources for Dr. Fabrizio Michelassi's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneDmand AI Affiliation Data
Primary practice, affiliations and health systemDmand AI Affiliation DataDmand AI Org Hierarchy Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
Part D prescribingMedicare 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 percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)
Publications, topics and co-authorsPubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage
Clinical trials and co-investigatorsDmand AI Research LinkageClinicalTrials.gov (National Library of Medicine) (opens in a new tab)
Awards and committee rolesDmand AI Professional Profile Data
Training, board certification and membershipsDmand AI Professional Profile Data
Insurance carriers and plan typesDmand AI Insurance Network Data
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand AI Affiliation Data

Data last refreshed October 2026Report an inaccuracyRemove my information

FAQ

Frequently asked questions about Dr. Fabrizio Michelassi

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. Fabrizio Michelassi's NPI number?

Dr. Fabrizio Michelassi's NPI number is 1952316499. It was assigned on July 31, 2006, and it is active in the NPI Registry.

What kind of doctor is Dr. Fabrizio Michelassi?

Dr. Fabrizio Michelassi is a general surgeon in Greenwich, Connecticut. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).

Where does Dr. Fabrizio Michelassi practice?

Dr. Michelassi practices at 5 Perryridge Rd, Greenwich, CT 06830. Dr. Michelassi's primary practice is Greenwich Hospital in Greenwich, Connecticut, part of Yale New Haven Health System. Dmand AI also links Dr. Michelassi to 1 group practice or clinic.

What is Dr. Fabrizio Michelassi's office phone number?

The practice phone on file for Dr. Michelassi is (203) 863-3000.

What is Dr. Fabrizio Michelassi's medical license number?

Dr. Michelassi's New York license number on file is 140048, one of the licenses on file in 4 states.

Which states has Dr. Fabrizio Michelassi been licensed in?

Dmand AI has state licenses on file for Dr. Michelassi in New York (1979 to 2025), Florida (since 2022), New Jersey (2023 to 2027) and Illinois (1984 to 2008).

Which hospitals is Dr. Fabrizio Michelassi affiliated with?

Dr. Michelassi practices at Greenwich Hospital in Greenwich, Connecticut.

What medical group is Dr. Fabrizio Michelassi part of?

Dr. Michelassi is linked to Weill Cornell Physicians.

Does Dr. Fabrizio Michelassi accept Medicare?

Yes. CMS data shows Dr. Michelassi billed Medicare for 12 services in 2022, and Dr. Michelassi accepts Medicare assignment.

What is Dr. Fabrizio Michelassi's MIPS score?

Dr. Michelassi's MIPS final score for performance year 2024 is 100 out of 100, reported through an alternative payment model (APM).

Show 9 more questionsShow fewer questions

How many Medicare patients does Dr. Fabrizio Michelassi see?

CMS counts 17 Medicare patients who saw Dr. Michelassi in 2024, with an average age of 75.

Is Dr. Fabrizio Michelassi board certified?

Yes. Dr. Michelassi is board certified in surgery by the American Board of Surgery.

What services does Dr. Fabrizio Michelassi bill to Medicare?

In 2022, Dr. Michelassi's most billed Medicare services were office visit, new patient (99205).

Where did Dr. Fabrizio Michelassi go to medical school?

Dr. Michelassi graduated from University of Pisa Faculty of Medicine in 1975.

What drugs does Dr. Fabrizio Michelassi prescribe most?

In 2023 Medicare Part D data, Dr. Michelassi's most prescribed drugs by claims were Loperamide.

How long has Dr. Fabrizio Michelassi been practicing?

Dr. Michelassi graduated from medical school in 1975, 51 years ago.

Does Dr. Fabrizio Michelassi do research?

Dmand AI links 134 publications to Dr. Michelassi, published from 2007 to 2024. Dr. Michelassi has worked on 1 clinical trial.

Who does Dr. Fabrizio Michelassi publish with?

Dr. Michelassi's most frequent co-authors are Heather Lynn Yeo, MD (10 shared papers), Alessandro Fichera, MD (8 shared papers) and Richard B. Arenas, MD (5 shared papers).

What insurance does Dr. Fabrizio Michelassi accept?

Dr. Michelassi is in network with 11 carriers, including Aetna, Excellus BlueCross BlueShield and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 9. Check the plan with the practice before a visit.

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