JAMA Netw Open
Delayed DiagnosisEarly Detection of CancerInsurance Coverage
Dr. Justin Michael Barnes, MD, MS
NPI1356968069PAC ID9436552841
- Part D claims, 2024
- 24
- Publications
- 53
- Hospital affiliations
- 1
- Industry payments
- $660
- Medical group
- 1
- Practice address
- 1216 Second Street Southwest, Rochester, MN 55902
- Practice phone
- Call (507) 255-5123
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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Dr. Justin Michael Barnes is a radiation oncologist in Rochester, Minnesota
Dr. Barnes practices at Mayo Clinic Hospital, Saint Marys Campus in Rochester, Minnesota, part of Mayo Clinic.
Dr. Barnes' NPI, 1356968069, was assigned on June 29, 2020. Dr. Barnes graduated from Saint Louis University School of Medicine in 2020. Dr. Barnes holds Missouri license 2020019027.
NPI and contact details
- NPI
- 1356968069NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9436552841
- NPI enumeration date
- June 29, 2020
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (507) 255-5123
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 32
- Medical school graduation
- 2020
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Justin Michael Barnes practices at Mayo Clinic Hospital, Saint Marys Campus in Rochester, Minnesota
Dr. Barnes' primary practice is Mayo Clinic Hospital, Saint Marys Campus, at 1216 Second Street Southwest, Rochester, MN 55902 in Olmsted County. The practice phone is (507) 255-5123.
- Mayo Clinic Hospital, Saint Marys Campus1216 Second Street Southwest, Rochester, MN 55902 · Olmsted CountyPhone(507) 255-5123
Source: Dmand AI Affiliation Data
Dr. Justin Michael Barnes is affiliated with 2 sites of care and 1 medical group
Dr. Barnes' primary practice is Mayo Clinic Hospital, Saint Marys Campus in Rochester, Minnesota, part of Mayo Clinic. The medical group on file is Mayo Clinic. Dmand AI also links Dr. Barnes to 1 more hospice, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Justin Michael Barnes' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Barnes practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mayo Clinic Hospital, Saint Marys Campus | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Justin Michael Barnes is one of 148 radiation oncologists in Minnesota
Radiation oncology is Dr. Barnes' primary specialty in the NPI Registry, under taxonomy code 2085R0001X. Dr. Barnes is licensed in Missouri.
Specialties and state licenses
- Radiation oncology, MissouriPrimary
Radiation oncologists near Dr. Barnes
Counts of radiation oncologists with a Dmand AI profile, by place and practice. Each opens the list.
148radiation oncologists in Minnesota67radiation oncologists in Rochester40radiation oncologists at Mayo Clinic Hospital, Saint Marys Campus
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Justin Michael Barnes' patients have a median age of 66
Across all payers, Dmand AI patient panel data puts Dr. Barnes' median patient age at 66, with 77% women.
Dr. Barnes' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 66
Patient panel by sex, all payers
- Women77%
- Men23%
Source: Dmand AI Patient Panel Data
Dr. Justin Michael Barnes wrote 24 Medicare Part D claims in 2024
In 2024, Dr. Barnes wrote 24 Medicare Part D claims for 17 patients. 100% of them were for generic drugs. CMS names the drug for 14 of them, across 1 drug with 11 or more claims each, at $212 in total drug cost.
Part D claims, 202424
Drugs named by CMS1
Total drug cost$212
Part D patients17
Dr. Barnes' 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.
Drug classes CMS tracks in Dr. Barnes' Part D claims, 2024
- Opioids58%14 of 24 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
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
How Dr. Justin Michael Barnes takes part in Medicare
Dr. Barnes 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. Justin Michael Barnes has 53 publications on record
Dmand AI links 53 papers to Dr. Barnes, published from 2018 to 2025. 2024 was the busiest year, with 8. The most frequent topics are Insurance Coverage, Patient Protection and Affordable Care Act and Medicaid. Dr. Barnes has published most often in JAMA Oncol. Dr. Barnes' most frequent co-authors are Fumiko Chino, MD, Hiram Alberto Gay, MD and Evan Michael Graboyes, MD.
Papers53
Years published2018 to 2025
Dr. Barnes' papers by year, 2018 to 2025
Topics Dr. Barnes writes about most
- Insurance Coverage
- Patient Protection and Affordable Care Act
- Medicaid
- Insurance, Health
- SEER Program
- Head and Neck Neoplasms
- Papillomavirus Infections
- Health Services Accessibility
Dr. Barnes' most frequent co-authors
- Fumiko Chino, MD8 shared papers
- Hiram Alberto Gay, MD5 shared papers
- Evan Michael Graboyes, MD5 shared papers
Recent publications by Dr. Barnes
Health Services AccessibilityHuman Papillomavirus VirusesInsurance Coverage
See who Dr. Barnes researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Barnes works with, so you can find a warm path to the right radiation oncologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Justin Michael Barnes received $660 in industry payments from 2022 to 2024
CMS Open Payments shows 4 general payments to Dr. Barnes from 2 drug and device companies from 2022 to 2024. Food and beverage make up the largest share, 100% of the total. RefleXion Medical, Inc. paid the most, $535.
General payments to Dr. Barnes by program year, 2022 to 2024
Companies that paid Dr. Barnes the most, 2022 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Justin Michael Barnes graduated from Saint Louis University School of Medicine
Dr. Barnes graduated from Saint Louis University School of Medicine in 2020.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Justin Michael Barnes'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) |
| 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. Justin Michael Barnes
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. Justin Michael Barnes' NPI number?
Dr. Justin Michael Barnes' NPI number is 1356968069. It was assigned on June 29, 2020, and it is active in the NPI Registry.
What kind of doctor is Dr. Justin Michael Barnes?
Dr. Justin Michael Barnes is a radiation oncologist in Rochester, Minnesota. The primary specialty in the NPI Registry is Radiation Oncology Physician (taxonomy code 2085R0001X).
Where does Dr. Justin Michael Barnes practice?
Dr. Barnes practices at 1216 Second Street Southwest, Rochester, MN 55902. Dr. Barnes' primary practice is Mayo Clinic Hospital, Saint Marys Campus in Rochester, Minnesota, part of Mayo Clinic. Dmand AI also links Dr. Barnes to 1 hospice.
What is Dr. Justin Michael Barnes' office phone number?
The practice phone on file for Dr. Barnes is (507) 255-5123.
What is Dr. Justin Michael Barnes' medical license number?
Dr. Barnes holds Missouri license 2020019027.
Which hospitals is Dr. Justin Michael Barnes affiliated with?
Dr. Barnes practices at Mayo Clinic Hospital, Saint Marys Campus in Rochester, Minnesota.
What medical group is Dr. Justin Michael Barnes part of?
Dr. Barnes is linked to Mayo Clinic.
Does Dr. Justin Michael Barnes accept Medicare?
Yes. CMS lists Dr. Barnes as accepting Medicare assignment.
Where did Dr. Justin Michael Barnes go to medical school?
Dr. Barnes graduated from Saint Louis University School of Medicine in 2020.
What drugs does Dr. Justin Michael Barnes prescribe most?
In 2023 Medicare Part D data, Dr. Barnes' most prescribed drugs by claims were Levothyroxine Sodium.
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Has Dr. Justin Michael Barnes received payments from drug or device companies?
CMS Open Payments shows $660 in general payments to Dr. Barnes from 2 companies from 2022 to 2024. The largest total came from RefleXion Medical, Inc.
How long has Dr. Justin Michael Barnes been practicing?
Dr. Barnes graduated from medical school in 2020, 6 years ago.
Does Dr. Justin Michael Barnes do research?
Dmand AI links 53 publications to Dr. Barnes, published from 2018 to 2025.
Who does Dr. Justin Michael Barnes publish with?
Dr. Barnes' most frequent co-authors are Fumiko Chino, MD (8 shared papers), Hiram Alberto Gay, MD (5 shared papers) and Evan Michael Graboyes, MD (5 shared papers).
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