Cell Line, TumorCell ProliferationMAP Kinase Signaling System
Dr. Jonathan Alfred Fletcher, MD
NPI1891713392PAC ID7517984461
- Medicare services, 2024
- 536
- Medicare patients, 2024
- 490
- Publications
- 54
- Hospital affiliations
- 3
- Industry payments
- $8,674
- Practice address
- 450 Brookline Avenue, Boston, MA 02115
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Fletcher's professional email, personal email and mobile number
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Dr. Jonathan Alfred Fletcher is a clinical cytogenetics physician in Boston, Massachusetts
Dr. Fletcher practices at Dana-Farber Cancer Institute in Boston, Massachusetts, part of Dana-Farber Cancer Institute.
Dr. Fletcher's NPI, 1891713392, was assigned on July 17, 2006. Dr. Fletcher graduated from Boston University School of Medicine in 1981. Dr. Fletcher holds Massachusetts license 55007.
NPI and contact details
- NPI
- 1891713392NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7517984461
- NPI enumeration date
- July 17, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 71
- Medical school graduation
- 1981
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Jonathan Alfred Fletcher practices at Dana-Farber Cancer Institute in Boston, Massachusetts
Dr. Fletcher's primary practice is Dana-Farber Cancer Institute, at 450 Brookline Avenue, Boston, MA 02115.
- Dana-Farber Cancer Institute450 Brookline Avenue, Boston, MA 02115
Source: Dmand AI Affiliation Data
Dr. Jonathan Alfred Fletcher is affiliated with 3 sites of care and 3 medical groups
Dr. Fletcher's primary practice is Dana-Farber Cancer Institute in Boston, Massachusetts, part of Dana-Farber Cancer Institute. Dr. Fletcher is also affiliated with Massachusetts General Hospital. The medical group on file is Massachusetts General Physicians Organization (MGPO). Dmand AI also links Dr. Fletcher to 1 more hospital and 2 medical groups, each named with a free account.
Massachusetts General HospitalMassachusetts General Physicians Organization (MGPO)1 hospitalName with a free account2 medical groupsNames with a free account
See all 6 affiliations for Dr. FletcherSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Jonathan Alfred Fletcher's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Fletcher practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dana-Farber Cancer Institute | Available with a free account |
| +2 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Jonathan Alfred Fletcher is one of 5 clinical cytogenetics physicians in Massachusetts
Clinical cytogenetics is Dr. Fletcher's primary specialty in the NPI Registry, under taxonomy code 207SC0300X. Dr. Fletcher is licensed in Massachusetts.
Specialties and state licenses
- Clinical cytogenetics, MassachusettsPrimary
Clinical cytogenetics physicians near Dr. Fletcher
Counts of clinical cytogenetics physicians with a Dmand AI profile, by place and practice. Each opens the list.
5clinical cytogenetics physicians in Massachusetts
5clinical cytogenetics physicians in Boston
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Jonathan Alfred Fletcher billed Medicare for 536 services in 2024
CMS data shows 536 Medicare services from Dr. Fletcher across 1 procedure code in 2024, for 490 Medicare patients. Medicare paid $15,359 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 2024536
Medicare patients490
Paid by Medicare$15,359
Procedure codes1
Dr. Fletcher's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Lab and pathology
- 2023: 4742024: 53613%
Dr. Fletcher'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.
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Source: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data
Dr. Jonathan Alfred Fletcher treated 490 Medicare patients in 2024, average age 74
CMS counts 490 Medicare patients who saw Dr. Fletcher in 2024. The largest group is 65 to 74, with 241 patients. 72% of them have high blood pressure, and 71% have high cholesterol. 8% are also on Medicaid. Their average risk score is 2.16, 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. Fletcher's median patient age at 68, with 47% women.
Medicare patients, 2024490
Average age74
Average risk score2.16
Also on Medicaid8%
Dr. Fletcher's Medicare patients by age, 2024
Dr. Fletcher's Medicare patients by sex, 2024
- Women22446%
- Men26654%
Chronic conditions among Dr. Fletcher's Medicare patients, 2024
- High blood pressure72%
- High cholesterol71%
- Arthritis45%
- Ischemic heart disease32%
- Anxiety30%
- Chronic kidney disease30%
- Mood disorders24%
- Atrial fibrillation23%
Share of Medicare patients with each condition. A patient can have several.
Dr. Fletcher's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 68
Patient panel by sex, all payers
- Women47%
- Men51%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How Dr. Jonathan Alfred Fletcher takes part in Medicare
Dr. Fletcher accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Jonathan Alfred Fletcher has 54 publications on record
Dmand AI links 54 papers to Dr. Fletcher, published from 2016 to 2025. 2019 was the busiest year, with 9. The most frequent topics are Gastrointestinal Stromal Tumors, Proto-Oncogene Proteins c-kit and Cell Line, Tumor. Dr. Fletcher has published most often in Br J Cancer. Dr. Fletcher's most frequent co-authors are George D. Demetri, MD, Michael Charles Heinrich, MD and Chandrajit Premanand Raut, MD.
Papers54
Years published2016 to 2025
Dr. Fletcher's papers by year, 2016 to 2025
Topics Dr. Fletcher writes about most
- Gastrointestinal Stromal Tumors
- Proto-Oncogene Proteins c-kit
- Cell Line, Tumor
- Cell Proliferation
- Gastrointestinal Neoplasms
- Protein Kinase Inhibitors
- Antineoplastic Agents
- Drug Resistance, Neoplasm
Dr. Fletcher's most frequent co-authors
- George D. Demetri, MD9 shared papers
- Michael Charles Heinrich, MD9 shared papers
- Chandrajit Premanand Raut, MD5 shared papers
Recent publications by Dr. Fletcher
BMC Gastroenterol
Barrett EsophagusBiopsyCapsule Endoscopy
Biodegradation, EnvironmentalPlantsPoaceae
J Clin Oncol
See who Dr. Fletcher researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Fletcher works with, so you can find a warm path to the right clinical cytogenetics physicians.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Jonathan Alfred Fletcher received $8,674 in industry payments from 2016 to 2023
CMS Open Payments shows 10 general payments to Dr. Fletcher from 2 drug and device companies from 2016 to 2023. Consulting fees make up the largest share, 56% of the total. Eli Lilly and Company paid the most, $6,125.
General payments to Dr. Fletcher by program year, 2016 to 2023
General payments to Dr. Fletcher by kind, 2016 to 2023
$8.7Kin total
- Consulting fees$4,90056%
- Honoraria$2,41528%
- Travel and lodging$91111%
- Food and beverage$4485%
Companies that paid Dr. Fletcher the most, 2016 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Jonathan Alfred Fletcher graduated from Boston University School of Medicine
Dr. Fletcher graduated from Boston University School of Medicine in 1981.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Jonathan Alfred Fletcher'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) |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - 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 |
| 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 Alfred Fletcher
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 Alfred Fletcher's NPI number?
Dr. Jonathan Alfred Fletcher's NPI number is 1891713392. It was assigned on July 17, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Jonathan Alfred Fletcher?
Dr. Jonathan Alfred Fletcher is a clinical cytogenetics physician in Boston, Massachusetts. The primary specialty in the NPI Registry is Clinical Cytogenetics Physician (taxonomy code 207SC0300X).
Where does Dr. Jonathan Alfred Fletcher practice?
Dr. Fletcher practices at 450 Brookline Avenue, Boston, MA 02115. Dr. Fletcher's primary practice is Dana-Farber Cancer Institute in Boston, Massachusetts, part of Dana-Farber Cancer Institute. Dmand AI also links Dr. Fletcher to 1 hospital and 2 medical groups.
What is Dr. Jonathan Alfred Fletcher's medical license number?
Dr. Fletcher holds Massachusetts license 55007.
Which hospitals is Dr. Jonathan Alfred Fletcher affiliated with?
Dr. Fletcher practices at Dana-Farber Cancer Institute in Boston, Massachusetts. Dr. Fletcher is also affiliated with Massachusetts General Hospital. Dmand AI links Dr. Fletcher to 1 more hospital.
What medical group is Dr. Jonathan Alfred Fletcher part of?
Dr. Fletcher is linked to Massachusetts General Physicians Organization (MGPO). Dmand AI links Dr. Fletcher to 2 more medical groups.
Does Dr. Jonathan Alfred Fletcher accept Medicare?
Yes. CMS data shows Dr. Fletcher billed Medicare for 536 services in 2024, and Dr. Fletcher accepts Medicare assignment.
How many Medicare patients does Dr. Jonathan Alfred Fletcher see?
CMS counts 490 Medicare patients who saw Dr. Fletcher in 2024, with an average age of 74.
What services does Dr. Jonathan Alfred Fletcher bill to Medicare?
In 2024, Dr. Fletcher's most billed Medicare services were lab and pathology test (88291).
Where did Dr. Jonathan Alfred Fletcher go to medical school?
Dr. Fletcher graduated from Boston University School of Medicine in 1981.
Show 4 more questionsShow fewer questions
Has Dr. Jonathan Alfred Fletcher received payments from drug or device companies?
CMS Open Payments shows $8,674 in general payments to Dr. Fletcher from 2 companies from 2016 to 2023. The largest total came from Eli Lilly and Company.
How long has Dr. Jonathan Alfred Fletcher been practicing?
Dr. Fletcher graduated from medical school in 1981, 45 years ago.
Does Dr. Jonathan Alfred Fletcher do research?
Dmand AI links 54 publications to Dr. Fletcher, published from 2016 to 2025.
Who does Dr. Jonathan Alfred Fletcher publish with?
Dr. Fletcher's most frequent co-authors are George D. Demetri, MD (9 shared papers), Michael Charles Heinrich, MD (9 shared papers) and Chandrajit Premanand Raut, MD (5 shared papers).
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