Carcinoma, Renal CellCentral Nervous System NeoplasmsHemangioblastoma
Dr. Othon Iliopoulos, MD
NPI1447352448PAC ID5890778369
- Medicare services, 2024
- 78
- Medicare patients, 2024
- 42
- Part D claims, 2024
- 21
- Publications
- 34
- Clinical trials
- 1
- Practice address
- 55 Fruit Street, Boston, MA 02114
- Practice phone
- Call (617) 726-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Iliopoulos' 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. Othon Iliopoulos is a medical oncologist in Boston, Massachusetts
Dr. Iliopoulos practices at Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham.
Dr. Iliopoulos' NPI, 1447352448, was assigned on September 1, 2006. Dr. Iliopoulos holds Massachusetts license 76267.
NPI and contact details
- NPI
- 1447352448NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5890778369
- NPI enumeration date
- September 1, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (617) 726-2000
- 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. Othon Iliopoulos practices at Massachusetts General Hospital in Boston, Massachusetts
Dr. Iliopoulos' primary practice is Massachusetts General Hospital, at 55 Fruit Street, Boston, MA 02114 in Suffolk County. The practice phone is (617) 726-2000.
- Massachusetts General Hospital55 Fruit Street, Boston, MA 02114 · Suffolk CountyPhone(617) 726-2000
Source: Dmand AI Affiliation Data
Dr. Othon Iliopoulos is affiliated with 5 sites of care and 2 medical groups
Dr. Iliopoulos' primary practice is Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham. Dr. Iliopoulos is also affiliated with Brigham and Women's Hospital. The medical group on file is Massachusetts General Hospital. Dmand AI also links Dr. Iliopoulos to 2 more group practices and clinics, 1 community health center and 1 medical group, each named with a free account. Dr. Iliopoulos' employer is on file too: a hospital.
Brigham and Women's HospitalMassachusetts General Hospital2 group practices and clinicsNames with a free account1 community health centerName with a free account1 medical groupName with a free accountEmployer: hospitalName with a free account
See all 7 affiliations for Dr. IliopoulosSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Othon Iliopoulos' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Iliopoulos practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Massachusetts General Hospital | Available with a free account |
| +4 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Othon Iliopoulos is one of 290 medical oncologists in Massachusetts
Medical oncology is Dr. Iliopoulos' primary specialty in the NPI Registry, under taxonomy code 207RX0202X. Dr. Iliopoulos is licensed in Massachusetts.
Specialties and state licenses
- Medical oncology, MassachusettsPrimary
Medical oncologists near Dr. Iliopoulos
Counts of medical oncologists with a Dmand AI profile, by place and practice. Each opens the list.
290medical oncologists in Massachusetts228medical oncologists in Boston45medical oncologists at Massachusetts General Hospital
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Othon Iliopoulos billed Medicare for 78 services in 2024
CMS data shows 78 Medicare services from Dr. Iliopoulos across 1 procedure code in 2024, all of them office visits, for 42 Medicare patients. Medicare paid $10,631 for them.
Medicare services, 202478
Medicare patients42
Paid by Medicare$10,631
Procedure codes1
Dr. Iliopoulos' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1172024: 7833%
Where Dr. Iliopoulos' Medicare services took place, 2024
- In an office3950%
- In a facility3950%
Dr. Iliopoulos compared with the Massachusetts median for medical oncologists, 2024
- Dr. Iliopoulos
- Massachusetts median
- Medicare services
- 78vs 26070% below
- Medicare patients
- 42vs 10961% below
- Part D claims
- 28vs 6356% below
Medians across 259 medical oncologists in Massachusetts with Dmand AI profiles that report each measure.
Dr. Iliopoulos' 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. Othon Iliopoulos treated 42 Medicare patients in 2024, average age 68
CMS counts 42 Medicare patients who saw Dr. Iliopoulos in 2024. The largest group is 65 to 74, with 21 patients. 64% of them have high blood pressure, and 64% have high cholesterol. Their average risk score is 1.49, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Iliopoulos' median patient age at 55, with 54% women.
Medicare patients, 202442
Average age68
Average risk score1.49
Dr. Iliopoulos' Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Iliopoulos' Medicare patients by sex, 2024
- Women2560%
- Men1740%
Chronic conditions among Dr. Iliopoulos' Medicare patients, 2024
- High blood pressure64%
- High cholesterol64%
- Cancer62%
- Arthritis43%
- Anxiety38%
- Mood disorders36%
- Depression26%
Share of Medicare patients with each condition. A patient can have several.
Dr. Iliopoulos' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 55
Patient panel by sex, all payers
- Women54%
- Men44%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Othon Iliopoulos wrote 21 Medicare Part D claims in 2024
In 2024, Dr. Iliopoulos wrote 21 Medicare Part D claims. 57% of them were for generic drugs. They cover 1 drug, with $793,504 in total drug cost. In 2022, CMS named 24 claims across 1 drug.
Part D claims, 202421
Drugs named by CMS1
Total drug cost$793,504
Dr. Iliopoulos' Part D claims by kind of drug, 2024
- Generic12 claims57%
- Brand-name and other9 claims43%
Dr. Iliopoulos' 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.
Part D claims for drugs CMS names, 2022 to 2023
- 2022
- 2023
- Claims for drugs CMS names
- 2022: 242023: 2817%
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. Othon Iliopoulos offers telehealth to Medicare patients
Dr. Iliopoulos accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Iliopoulos as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Othon Iliopoulos has 34 publications on record
Dmand AI links 34 papers to Dr. Iliopoulos, published from 2011 to 2025. 2021 was the busiest year, with 4. The most frequent topics are Carcinoma, Renal Cell, Kidney Neoplasms and Cell Line, Tumor. Dr. Iliopoulos has published most often in Clin Cancer Res. Dr. Iliopoulos' most frequent co-authors are Eric Jonasch, MD, Vivek K. Narayan, MD and Tobias Else, MD.
Papers34
Years published2011 to 2025
Dr. Iliopoulos' papers by year, 2014 to 2025
Topics Dr. Iliopoulos writes about most
- Carcinoma, Renal Cell
- Kidney Neoplasms
- Cell Line, Tumor
- Von Hippel-Lindau Tumor Suppressor Protein
- Basic Helix-Loop-Helix Transcription Factors
- von Hippel-Lindau Disease
- Glutamine
- Zebrafish
Dr. Iliopoulos' most frequent co-authors
Recent publications by Dr. Iliopoulos
Cell Line, TumorDNA DamageGene Expression Regulation, Neoplastic
Basic Helix-Loop-Helix Transcription FactorsCentral Nervous System NeoplasmsHemangioblastoma
Seventh BHD international symposium: recent scientific and clinical advancement (opens in a new tab)
Oncotarget
Birt-Hogg-Dube Syndrome
See who Dr. Iliopoulos researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Iliopoulos works with, so you can find a warm path to the right medical oncologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Othon Iliopoulos has worked on 1 clinical trial
Dmand AI links Dr. Iliopoulos to 1 clinical trial. Conditions studied include Mesothelioma and Neoplasms, Mesothelial.
Conditions in Dr. Iliopoulos' trials
- Mesothelioma
- Neoplasms, Mesothelial
Investigators on the most trials with Dr. Iliopoulos
- James J. Harding, MD1 shared trial
- James W. Mier, MD1 shared trial
- Pamela N. Munster, MD1 shared trial
Recent clinical trials with Dr. Iliopoulos
MesotheliomaNeoplasms, MesothelialCB-839CB-CaboCBD
Sources: Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)
Dr. Othon Iliopoulos received $100,838 in industry payments from 2020 to 2025
CMS Open Payments shows 48 general payments to Dr. Iliopoulos from 1 drug or device company from 2020 to 2025. Speaker and faculty fees make up the largest share, 50% of the total. Merck Sharp & Dohme Corporation paid the most, $100,838.
General payments to Dr. Iliopoulos by program year, 2020 to 2025
General payments to Dr. Iliopoulos by kind, 2020 to 2025
$100.8Kin total
- Speaker and faculty fees$50,33050%
- Travel and lodging$29,65729%
- Consulting fees$20,25520%
- Food and beverage$5411%
- Education$550%
Companies that paid Dr. Iliopoulos the most, 2020 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Othon Iliopoulos'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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Clinical trials and co-investigators | Dmand AI Research LinkageClinicalTrials.gov (National Library of Medicine) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Othon Iliopoulos
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. Othon Iliopoulos' NPI number?
Dr. Othon Iliopoulos' NPI number is 1447352448. It was assigned on September 1, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Othon Iliopoulos?
Dr. Othon Iliopoulos is a medical oncologist in Boston, Massachusetts. The primary specialty in the NPI Registry is Medical Oncology Physician (taxonomy code 207RX0202X).
Where does Dr. Othon Iliopoulos practice?
Dr. Iliopoulos practices at 55 Fruit Street, Boston, MA 02114. Dr. Iliopoulos' primary practice is Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham. Dmand AI also links Dr. Iliopoulos to 2 group practices and clinics, 1 community health center and 1 medical group.
What is Dr. Othon Iliopoulos' office phone number?
The practice phone on file for Dr. Iliopoulos is (617) 726-2000.
What is Dr. Othon Iliopoulos' medical license number?
Dr. Iliopoulos holds Massachusetts license 76267.
Which hospitals is Dr. Othon Iliopoulos affiliated with?
Dr. Iliopoulos practices at Massachusetts General Hospital in Boston, Massachusetts. Dr. Iliopoulos is also affiliated with Brigham and Women's Hospital.
What medical group is Dr. Othon Iliopoulos part of?
Dr. Iliopoulos is linked to Massachusetts General Hospital. Dmand AI links Dr. Iliopoulos to 1 more medical group.
Does Dr. Othon Iliopoulos accept Medicare?
Yes. CMS data shows Dr. Iliopoulos billed Medicare for 78 services in 2024, and Dr. Iliopoulos accepts Medicare assignment.
Does Dr. Othon Iliopoulos offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Iliopoulos as offering telehealth services.
How many Medicare patients does Dr. Othon Iliopoulos see?
CMS counts 42 Medicare patients who saw Dr. Iliopoulos in 2024, with an average age of 68.
Show 6 more questionsShow fewer questions
What services does Dr. Othon Iliopoulos bill to Medicare?
In 2024, Dr. Iliopoulos' most billed Medicare services were office visit, established patient (99215).
What drugs does Dr. Othon Iliopoulos prescribe most?
In 2023 Medicare Part D data, Dr. Iliopoulos' most prescribed drugs by claims were Welireg.
Has Dr. Othon Iliopoulos received payments from drug or device companies?
CMS Open Payments shows $100,838 in general payments to Dr. Iliopoulos from 1 company from 2020 to 2025. The largest total came from Merck Sharp & Dohme Corporation.
How long has Dr. Othon Iliopoulos been practicing?
Dr. Iliopoulos graduated from medical school in 1985, 41 years ago.
Does Dr. Othon Iliopoulos do research?
Dmand AI links 34 publications to Dr. Iliopoulos, published from 2011 to 2025. Dr. Iliopoulos has worked on 1 clinical trial.
Who does Dr. Othon Iliopoulos publish with?
Dr. Iliopoulos' most frequent co-authors are Eric Jonasch, MD (6 shared papers), Vivek K. Narayan, MD (5 shared papers) and Tobias Else, MD (4 shared papers).
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