Ann Surg Oncol
Breast NeoplasmsMammaplastyMastectomy
Dr. Alyssa Gillego, MD
NPI1659567352PAC ID0749335214
- Medicare services, 2024
- 119
- Medicare patients, 2024
- 113
- Part D claims, 2024
- 14
- Publications
- 3
- MIPS score, 2024
- 87
- Practice address
- 5 Perryridge Rd, Greenwich, CT 06830
- Practice phone
- Call (203) 863-3000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Gillego'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. Alyssa Gillego is a general surgeon in Greenwich, Connecticut
Dr. Gillego practices at Greenwich Hospital in Greenwich, Connecticut, part of Yale New Haven Health System.
Dr. Gillego's NPI, 1659567352, was assigned on September 18, 2007. Dr. Gillego graduated from Far Eastern University Nicanor Reyes Medical Foundation in 2001. Dr. Gillego holds Connecticut license 056739.
NPI and contact details
- NPI
- 1659567352NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0749335214
- NPI enumeration date
- September 18, 2007
- 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
- Female
- Estimated age
- 51
- Medical school graduation
- 2001
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Alyssa Gillego practices at Greenwich Hospital in Greenwich, Connecticut
Dr. Gillego's primary practice is Greenwich Hospital, at 5 Perryridge Rd, Greenwich, CT 06830 in Fairfield County. The practice phone is (203) 863-3000.
- Greenwich Hospital5 Perryridge Rd, Greenwich, CT 06830 · Fairfield CountyPhone(203) 863-3000
Source: Dmand AI Affiliation Data
Dr. Alyssa Gillego is affiliated with 4 sites of care and 3 medical groups
Dr. Gillego's primary practice is Greenwich Hospital in Greenwich, Connecticut, part of Yale New Haven Health System. The medical group on file is Yale Health. Dmand AI also links Dr. Gillego to 3 more group practices and clinics and 2 medical groups, each named with a free account.
Yale Health3 group practices and clinicsNames with a free account2 medical groupsNames with a free account
See all 7 affiliations for Dr. GillegoSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Alyssa Gillego's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Gillego practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Greenwich Hospital | Available with a free account |
| +3 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
See the EHR and IT leaders at every hospital where Dr. Gillego practices
Dmand AI maps EHR vendors, IT decision makers and buying committees across Yale New Haven Health System and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Alyssa Gillego is one of 303 general surgeons in Connecticut
Surgery is Dr. Gillego's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dmand AI has Dr. Gillego's licenses on file in 2 states: Connecticut and New York.
Specialties and state licenses
- Surgery, ConnecticutPrimary
- New York license
General surgeons near Dr. Gillego
Counts of general surgeons with a Dmand AI profile, by place and practice. Each opens the list.
303general surgeons in Connecticut
7general surgeons in Greenwich
5general surgeons at Greenwich HospitalSources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Alyssa Gillego billed Medicare for 119 services in 2024
CMS data shows 119 Medicare services from Dr. Gillego across 3 procedure codes in 2024, for 113 Medicare patients. Medicare paid $15,490 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 2024119
Medicare patients113
Paid by Medicare$15,490
Procedure codes3
Dr. Gillego's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 822024: 10730%
- Surgery
- 2023: 182024: 1233%
Dr. Gillego compared with the Connecticut median for general surgeons, 2024
- Dr. Gillego
- Connecticut median
- Medicare services
- 119vs 1099% above
- Medicare patients
- 113vs 9519% above
Medians across 295 general surgeons in Connecticut with Dmand AI profiles that report each measure.
Dr. Gillego'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. Gillego?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Gillego and other general surgeons in Connecticut.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Alyssa Gillego treated 113 Medicare patients in 2024, average age 75
CMS counts 113 Medicare patients who saw Dr. Gillego in 2024. The largest group is 75 to 84, with 54 patients. 75% of them have cancer, and 75% have high cholesterol. Their average risk score is 1.04, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Gillego's median patient age at 64, with 96% women.
Medicare patients, 2024113
Average age75
Average risk score1.04
Dr. Gillego's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Chronic conditions among Dr. Gillego's Medicare patients, 2024
- Cancer75%
- High cholesterol75%
- High blood pressure60%
- Arthritis46%
- Osteoporosis34%
- Anxiety25%
- Diabetes19%
- Mood disorders19%
Share of Medicare patients with each condition. A patient can have several.
Dr. Gillego's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 64
Patient panel by sex, all payers
- Women96%
- Men1%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Alyssa Gillego wrote 14 Medicare Part D claims in 2024
In 2024, Dr. Gillego wrote 14 Medicare Part D claims. 79% of them were for generic drugs.
Part D claims, 202414
Dr. Gillego's Part D claims by kind of drug, 2024
- Generic11 claims79%
- Brand-name and other3 claims21%
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Alyssa Gillego scored 87 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 87 out of 100 for Dr. Gillego for performance year 2024, reported as part of a group. Dr. Gillego accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 23 procedures of mastectomy by Dr. Gillego, more than 81% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Dr. Gillego's MIPS scores, performance year 2024
- 87of 100Final score
- 77.4of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 74of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Where Dr. Gillego ranks in Medicare procedure volume
- Mastectomy
- 81st percentile23 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Skin biopsy: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
For MedTech and pharma teams
Find general surgeons like Dr. Gillego by procedure volume and prescribing
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Alyssa Gillego has 3 publications on record
Dmand AI links 3 papers to Dr. Gillego, published from 2012 to 2024. 2024 was the busiest year, with 2. The most frequent topics are Breast Neoplasms. Dr. Gillego has published most often in Ann Surg Oncol. Dr. Gillego's most frequent co-authors are Mehra Golshan, MD, Ellie Proussaloglou, MD and Gregory Zanieski, MD.
Papers3
Years published2012 to 2024
Topics Dr. Gillego writes about most
- Breast Neoplasms
Dr. Gillego's most frequent co-authors
- Mehra Golshan, MD2 shared papers
- Ellie Proussaloglou, MD2 shared papers
- Gregory Zanieski, MD2 shared papers
Recent publications by Dr. Gillego
Ann Surg Oncol
AxillaBreast NeoplasmsCarcinoma, Ductal, Breast
See who Dr. Gillego researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Gillego works with, so you can find a warm path to the right general surgeons.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Alyssa Gillego received $426 in industry payments in 2025
CMS Open Payments shows 2 general payments to Dr. Gillego from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. AxoGen paid the most, $426.
Companies that paid Dr. Gillego 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. Alyssa Gillego graduated from Far Eastern University Nicanor Reyes Medical Foundation
Dr. Gillego graduated from Far Eastern University Nicanor Reyes Medical Foundation in 2001.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Alyssa Gillego'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 (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)Doctors and Clinicians Utilization Data (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. Alyssa Gillego
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. Alyssa Gillego's NPI number?
Dr. Alyssa Gillego's NPI number is 1659567352. It was assigned on September 18, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Alyssa Gillego?
Dr. Alyssa Gillego is a general surgeon in Greenwich, Connecticut. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Alyssa Gillego practice?
Dr. Gillego practices at 5 Perryridge Rd, Greenwich, CT 06830. Dr. Gillego's primary practice is Greenwich Hospital in Greenwich, Connecticut, part of Yale New Haven Health System. Dmand AI also links Dr. Gillego to 3 group practices and clinics and 2 medical groups.
What is Dr. Alyssa Gillego's office phone number?
The practice phone on file for Dr. Gillego is (203) 863-3000.
What is Dr. Alyssa Gillego's medical license number?
Dr. Gillego holds Connecticut license 056739, one of the licenses on file in 2 states.
Which states has Dr. Alyssa Gillego been licensed in?
Dmand AI has state licenses on file for Dr. Gillego in Connecticut and New York.
Which hospitals is Dr. Alyssa Gillego affiliated with?
Dr. Gillego practices at Greenwich Hospital in Greenwich, Connecticut.
What medical group is Dr. Alyssa Gillego part of?
Dr. Gillego is linked to Yale Health. Dmand AI links Dr. Gillego to 2 more medical groups.
Does Dr. Alyssa Gillego accept Medicare?
Yes. CMS data shows Dr. Gillego billed Medicare for 119 services in 2024, and Dr. Gillego accepts Medicare assignment.
What is Dr. Alyssa Gillego's MIPS score?
Dr. Gillego's MIPS final score for performance year 2024 is 87 out of 100, reported as part of a group.
Show 7 more questionsShow fewer questions
How many Medicare patients does Dr. Alyssa Gillego see?
CMS counts 113 Medicare patients who saw Dr. Gillego in 2024, with an average age of 75.
What services does Dr. Alyssa Gillego bill to Medicare?
In 2024, Dr. Gillego's most billed Medicare services were office visit, established patient (99214), office visit, new patient (99205) and surgery: skin and soft tissue (19301).
Where did Dr. Alyssa Gillego go to medical school?
Dr. Gillego graduated from Far Eastern University Nicanor Reyes Medical Foundation in 2001.
Has Dr. Alyssa Gillego received payments from drug or device companies?
CMS Open Payments shows $426 in general payments to Dr. Gillego from 1 company from 2025 to 2025. The largest total came from AxoGen.
How long has Dr. Alyssa Gillego been practicing?
Dr. Gillego graduated from medical school in 2001, 25 years ago.
Does Dr. Alyssa Gillego do research?
Dmand AI links 3 publications to Dr. Gillego, published from 2012 to 2024.
Who does Dr. Alyssa Gillego publish with?
Dr. Gillego's most frequent co-authors are Mehra Golshan, MD (2 shared papers), Ellie Proussaloglou, MD (2 shared papers) and Gregory Zanieski, MD (2 shared papers).
Selling to surgery practices?
See general surgeons in Connecticut by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card