HIV InfectionsHomosexuality, MaleLife Expectancy
Dr. John Chiosi, MD
NPI1306231097PAC ID6103106299
- Medicare services, 2024
- 105
- Medicare patients, 2024
- 56
- Part D claims, 2024
- 87
- Publications
- 5
- Hospital affiliations
- 5
- 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. Chiosi'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. John Chiosi is an infectious disease specialist in Boston, Massachusetts
Dr. Chiosi practices at Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham.
Dr. Chiosi's NPI, 1306231097, was assigned on March 31, 2015. Dr. Chiosi graduated from Icahn School of Medicine at Mount Sinai in 2015. Dr. Chiosi holds Massachusetts license 279009.
NPI and contact details
- NPI
- 1306231097NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6103106299
- NPI enumeration date
- March 31, 2015
- 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
- 37
- Medical school graduation
- 2015
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John Chiosi practices at Massachusetts General Hospital in Boston, Massachusetts
Dr. Chiosi's 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. John Chiosi is affiliated with 6 sites of care and 7 medical groups
Dr. Chiosi's primary practice is Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham. Dr. Chiosi is also affiliated with New England Baptist Hospital. The medical group on file is Massachusetts General Physicians Organization (MGPO). Dmand AI also links Dr. Chiosi to 3 more hospitals, 6 medical groups and 1 community health center, each named with a free account.
New England Baptist HospitalMassachusetts General Physicians Organization (MGPO)3 hospitalsNames with a free account6 medical groupsNames with a free account1 community health centerName with a free account
See all 13 affiliations for Dr. ChiosiSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. John Chiosi's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chiosi practices, 6 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 |
| +5 more sites and 6 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John Chiosi is one of 395 infectious disease specialists in Massachusetts
Infectious disease is Dr. Chiosi's primary specialty in the NPI Registry, under taxonomy code 207RI0200X. Dr. Chiosi is licensed in Massachusetts.
Specialties and state licenses
- Infectious disease, MassachusettsPrimary
Infectious disease specialists near Dr. Chiosi
Counts of infectious disease specialists with a Dmand AI profile, by place and practice. Each opens the list.
395infectious disease specialists in Massachusetts209infectious disease specialists in Boston45infectious disease specialists at Massachusetts General Hospital
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. John Chiosi billed Medicare for 105 services in 2024
CMS data shows 105 Medicare services from Dr. Chiosi across 4 procedure codes in 2024, for 56 Medicare patients. Medicare paid $8,392 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 2024105
Medicare patients56
Paid by Medicare$8,392
Procedure codes4
Dr. Chiosi's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 962024: 1059%
Dr. Chiosi compared with the Massachusetts median for infectious disease specialists, 2024
- Dr. Chiosi
- Massachusetts median
- Medicare services
- 105vs 16336% below
- Medicare patients
- 56vs 9440% below
- Part D claims
- 14vs 10887% below
Medians across 363 infectious disease specialists in Massachusetts with Dmand AI profiles that report each measure.
Dr. Chiosi'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. Chiosi?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Chiosi and other infectious disease specialists in Massachusetts.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John Chiosi treated 56 Medicare patients in 2024, average age 72
CMS counts 56 Medicare patients who saw Dr. Chiosi in 2024. The largest group is 65 to 74, with 26 patients. 75% of them have high blood pressure, and 73% have high cholesterol. 32% are also on Medicaid. Their average risk score is 2.06, 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. Chiosi's median patient age at 71, with 48% women.
Medicare patients, 202456
Average age72
Average risk score2.06
Also on Medicaid32%
Dr. Chiosi's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Chiosi's Medicare patients by sex, 2024
- Women2239%
- Men3461%
Chronic conditions among Dr. Chiosi's Medicare patients, 2024
- High blood pressure75%
- High cholesterol73%
- Arthritis55%
- Ischemic heart disease54%
- Chronic kidney disease50%
- Diabetes46%
- Heart failure43%
- Anxiety41%
Share of Medicare patients with each condition. A patient can have several.
Dr. Chiosi's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 71
Patient panel by sex, all payers
- Women48%
- Men52%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John Chiosi wrote 87 Medicare Part D claims in 2024
In 2024, Dr. Chiosi wrote 87 Medicare Part D claims for 17 patients. 71% of them were for generic drugs. CMS names the drug for 14 of them, across 1 drug with 11 or more claims each, at $53,365 in total drug cost. In 2021, CMS named 67 claims across 5 drugs.
Part D claims, 202487
Drugs named by CMS1
Total drug cost$53,365
Part D patients17
Dr. Chiosi's Part D claims by kind of drug, 2024
- Generic62 claims71%
- Brand-name25 claims29%
Dr. Chiosi's most prescribed drugs by claims, 2022
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. Chiosi's Part D claims, 2024
- Antibiotics57%50 of 87 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, 2021 to 2022
- 2021
- 2022
- Claims for drugs CMS names
- 2021: 672022: 1479%
Drugs named by CMS: 1 in 2022, 5 in 2021.
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. John Chiosi offers telehealth to Medicare patients
Dr. Chiosi accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Chiosi as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. John Chiosi has 5 publications on record
Dmand AI links 5 papers to Dr. Chiosi, published from 2020 to 2023. 2023 was the busiest year, with 3. The most frequent topics are HIV Infections. Dr. Chiosi's most frequent co-authors are Andrea L. Ciaranello, MD, Emily P. Hyle, MD and Caitlin M. Dugdale, MD.
Papers5
Years published2020 to 2023
Dr. Chiosi's papers by year, 2020 to 2023
Topics Dr. Chiosi writes about most
- HIV Infections
Dr. Chiosi's most frequent co-authors
- Andrea L. Ciaranello, MD3 shared papers
- Emily P. Hyle, MD2 shared papers
- Caitlin M. Dugdale, MD1 shared paper
Recent publications by Dr. Chiosi
BMC Health Serv Res
Analgesics, OpioidDrug OverdoseHepacivirus
Am J Trop Med Hyg
Antibodies, ViralImmunoglobulin MLassa Fever
See who Dr. Chiosi researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Chiosi works with, so you can find a warm path to the right infectious disease specialists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. John Chiosi graduated from Icahn School of Medicine at Mount Sinai
Dr. Chiosi graduated from Icahn School of Medicine at Mount Sinai in 2015.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. John Chiosi'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 |
| 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. John Chiosi
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. John Chiosi's NPI number?
Dr. John Chiosi's NPI number is 1306231097. It was assigned on March 31, 2015, and it is active in the NPI Registry.
What kind of doctor is Dr. John Chiosi?
Dr. John Chiosi is an infectious disease specialist in Boston, Massachusetts. The primary specialty in the NPI Registry is Infectious Disease Physician (taxonomy code 207RI0200X).
Where does Dr. John Chiosi practice?
Dr. Chiosi practices at 55 Fruit Street, Boston, MA 02114. Dr. Chiosi's primary practice is Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham. Dmand AI also links Dr. Chiosi to 3 hospitals, 6 medical groups and 1 community health center.
What is Dr. John Chiosi's office phone number?
The practice phone on file for Dr. Chiosi is (617) 726-2000.
What is Dr. John Chiosi's medical license number?
Dr. Chiosi holds Massachusetts license 279009.
Which hospitals is Dr. John Chiosi affiliated with?
Dr. Chiosi practices at Massachusetts General Hospital in Boston, Massachusetts. Dr. Chiosi is also affiliated with New England Baptist Hospital. Dmand AI links Dr. Chiosi to 3 more hospitals.
What medical group is Dr. John Chiosi part of?
Dr. Chiosi is linked to Massachusetts General Physicians Organization (MGPO). Dmand AI links Dr. Chiosi to 6 more medical groups.
Does Dr. John Chiosi accept Medicare?
Yes. CMS data shows Dr. Chiosi billed Medicare for 105 services in 2024, and Dr. Chiosi accepts Medicare assignment.
Does Dr. John Chiosi offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Chiosi as offering telehealth services.
How many Medicare patients does Dr. John Chiosi see?
CMS counts 56 Medicare patients who saw Dr. Chiosi in 2024, with an average age of 72.
Show 6 more questionsShow fewer questions
What services does Dr. John Chiosi bill to Medicare?
In 2024, Dr. Chiosi's most billed Medicare services were hospital inpatient care (99232), hospital inpatient care (99233) and office visit, established patient (99214).
Where did Dr. John Chiosi go to medical school?
Dr. Chiosi graduated from Icahn School of Medicine at Mount Sinai in 2015.
What drugs does Dr. John Chiosi prescribe most?
In 2022 Medicare Part D data, Dr. Chiosi's most prescribed drugs by claims were Genvoya.
How long has Dr. John Chiosi been practicing?
Dr. Chiosi graduated from medical school in 2015, 11 years ago.
Does Dr. John Chiosi do research?
Dmand AI links 5 publications to Dr. Chiosi, published from 2020 to 2023.
Who does Dr. John Chiosi publish with?
Dr. Chiosi's most frequent co-authors are Andrea L. Ciaranello, MD (3 shared papers), Emily P. Hyle, MD (2 shared papers) and Caitlin M. Dugdale, MD (1 shared paper).
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