Dr. Jonathan Michael Downie, MD, PhD
- Part D claims, 2024
- 79
- Publications
- 17
- Hospital affiliations
- 2
- Industry payments
- $500
- Medical groups
- 3
- 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. Downie's professional email, personal email and mobile number
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Dr. Jonathan Michael Downie is a gastroenterologist in Boston, Massachusetts
Dr. Downie practices at Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham.
Dr. Downie's NPI, 1306305503, was assigned on March 18, 2019. Dr. Downie graduated from University of Utah School of Medicine in 2019. Dr. Downie holds Massachusetts license 291581.
- NPI
- 1306305503NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7618206970
- NPI enumeration date
- March 18, 2019
- 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
- 33
- Medical school graduation
- 2019
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Jonathan Michael Downie practices at Massachusetts General Hospital in Boston, Massachusetts
Dr. Downie'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. Jonathan Michael Downie is affiliated with 3 sites of care and 3 medical groups
Dr. Downie's primary practice is Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham. Dr. Downie is also affiliated with Mount Auburn Hospital. The medical group on file is Massachusetts General Physicians Organization (MGPO). Dmand AI also links Dr. Downie to 2 more medical groups and 1 community health center, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Jonathan Michael Downie's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Downie practices, 3 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 |
| +2 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Mass General Brigham and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Jonathan Michael Downie is one of 597 gastroenterologists in Massachusetts
Gastroenterology is Dr. Downie's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Downie is licensed in Massachusetts.
Specialties and state licenses
- Gastroenterology, MassachusettsPrimary
Gastroenterologists near Dr. Downie
Counts of gastroenterologists 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. Jonathan Michael Downie's patients have a median age of 70
Across all payers, Dmand AI patient panel data puts Dr. Downie's median patient age at 70, with 50% women.
Dr. Downie's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 70
Patient panel by sex, all payers
- Women50%
- Men48%
Source: Dmand AI Patient Panel Data
Dr. Jonathan Michael Downie wrote 79 Medicare Part D claims in 2024
In 2024, Dr. Downie wrote 79 Medicare Part D claims for 17 patients. 73% of them were for generic drugs. CMS names the drug for 24 of them, across 1 drug with 11 or more claims each, at $634 in total drug cost. In 2023, CMS named 57 claims across 4 drugs.
Dr. Downie's Part D claims by kind of drug, 2024
- Generic58 claims73%
- Brand-name21 claims27%
Dr. Downie's most prescribed drugs by claims, 2024
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, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 572024: 2458%
Drugs named by CMS: 1 in 2024, 4 in 2023.
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. Jonathan Michael Downie ranks in the 61st percentile for upper gastrointestinal (gi) endoscopy for acid reflux in Medicare
Dr. Downie accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Downie as offering telehealth. CMS counts 43 procedures of upper gastrointestinal (gi) endoscopy for acid reflux by Dr. Downie, more than 61% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Where Dr. Downie ranks in Medicare procedure volume
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 61st percentile43 procedures
- Colonoscopy
- 54th percentile30 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Jonathan Michael Downie has 17 publications on record
Dmand AI links 17 papers to Dr. Downie, published from 2011 to 2025. 2016 was the busiest year, with 3. The most frequent topics are Colorectal Neoplasms, Genetic Predisposition to Disease and Aspirin. Dr. Downie has published most often in PLoS Genet. Dr. Downie's most frequent co-authors are David Alan Drew, MD, Joshua David Schiffman, MD and Phillip Evan Barnette.
Dr. Downie's papers by year, 2011 to 2025
Topics Dr. Downie writes about most
- Colorectal Neoplasms
- Genetic Predisposition to Disease
- Aspirin
- DNA Copy Number Variations
- Gene Frequency
- Genome-Wide Association Study
- Genomics
- Precursor Cell Lymphoblastic Leukemia-Lymphoma
Dr. Downie's most frequent co-authors
- David Alan Drew, MD4 shared papers
- Joshua David Schiffman, MD4 shared papers
- Phillip Evan Barnette3 shared papers
Recent publications by Dr. Downie
See who Dr. Downie researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Downie works with, so you can find a warm path to the right gastroenterologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Jonathan Michael Downie received $500 in industry payments in 2025
CMS Open Payments shows 1 general payment to Dr. Downie from 1 drug or device company in 2025. Consulting fees make up the largest share, 100% of the total. Gyrus ACMI, Inc. paid the most, $500.
Companies that paid Dr. Downie 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. Jonathan Michael Downie graduated from University of Utah School of Medicine
Dr. Downie graduated from University of Utah School of Medicine in 2019.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Jonathan Michael Downie'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 patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| 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)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. Jonathan Michael Downie
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. Jonathan Michael Downie's NPI number?
Dr. Jonathan Michael Downie's NPI number is 1306305503. It was assigned on March 18, 2019, and it is active in the NPI Registry.
What kind of doctor is Dr. Jonathan Michael Downie?
Dr. Jonathan Michael Downie is a gastroenterologist in Boston, Massachusetts. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Jonathan Michael Downie practice?
Dr. Downie practices at 55 Fruit Street, Boston, MA 02114. Dr. Downie's primary practice is Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham. Dmand AI also links Dr. Downie to 2 medical groups and 1 community health center.
What is Dr. Jonathan Michael Downie's office phone number?
The practice phone on file for Dr. Downie is (617) 726-2000.
What is Dr. Jonathan Michael Downie's medical license number?
Dr. Downie holds Massachusetts license 291581.
Which hospitals is Dr. Jonathan Michael Downie affiliated with?
Dr. Downie practices at Massachusetts General Hospital in Boston, Massachusetts. Dr. Downie is also affiliated with Mount Auburn Hospital.
What medical group is Dr. Jonathan Michael Downie part of?
Dr. Downie is linked to Massachusetts General Physicians Organization (MGPO). Dmand AI links Dr. Downie to 2 more medical groups.
Does Dr. Jonathan Michael Downie accept Medicare?
Yes. CMS lists Dr. Downie as accepting Medicare assignment.
Does Dr. Jonathan Michael Downie offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Downie as offering telehealth services.
Where did Dr. Jonathan Michael Downie go to medical school?
Dr. Downie graduated from University of Utah School of Medicine in 2019.
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What drugs does Dr. Jonathan Michael Downie prescribe most?
In 2024 Medicare Part D data, Dr. Downie's most prescribed drugs by claims were Omeprazole.
Has Dr. Jonathan Michael Downie received payments from drug or device companies?
CMS Open Payments shows $500 in general payments to Dr. Downie from 1 company from 2025 to 2025. The largest total came from Gyrus ACMI, Inc.
How long has Dr. Jonathan Michael Downie been practicing?
Dr. Downie graduated from medical school in 2019, 7 years ago.
Does Dr. Jonathan Michael Downie do research?
Dmand AI links 17 publications to Dr. Downie, published from 2011 to 2025.
Who does Dr. Jonathan Michael Downie publish with?
Dr. Downie's most frequent co-authors are David Alan Drew, MD (4 shared papers), Joshua David Schiffman, MD (4 shared papers) and Phillip Evan Barnette (3 shared papers).
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