Dr. John Herbert Rees, MD
- Medicare services, 2024
- 2,257
- Medicare patients, 2024
- 1,567
- Publications
- 24
- MIPS score, 2024
- 75
- Hospital affiliations
- 5
- Practice address
- 22 South Greene Street, Baltimore, MD 21201
- Practice phone
- Call (410) 328-8667
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Rees' professional email, personal email and mobile number
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Dr. John Herbert Rees is a diagnostic radiologist in Baltimore, Maryland
Dr. Rees practices at University of Maryland Medical Center in Baltimore, Maryland, part of University of Maryland Medical System.
Dr. Rees' NPI, 1033199344, was assigned on January 20, 2006. Dr. Rees graduated from Georgetown University School Of Medicine in 1981. Dr. Rees' Maryland license number on file is D0047894.
- NPI
- 1033199344NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3274517446
- NPI enumeration date
- January 20, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (410) 328-8667
- 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. John Herbert Rees practices at University of Maryland Medical Center in Baltimore, Maryland
Dr. Rees' primary practice is University of Maryland Medical Center, at 22 South Greene Street, Baltimore, MD 21201 in Baltimore City. The practice phone is (410) 328-8667.
- University of Maryland Medical Center22 South Greene Street, Baltimore, MD 21201 · Baltimore CityPhone(410) 328-8667
Source: Dmand AI Affiliation Data
Dr. John Herbert Rees is affiliated with 5 sites of care and 4 medical groups
Dr. Rees' primary practice is University of Maryland Medical Center in Baltimore, Maryland, part of University of Maryland Medical System. Dr. Rees is also affiliated with University of Maryland Medical Center Midtown Campus. The medical group on file is University of Maryland Diagnostic Imaging Specialists. Dmand AI also links Dr. Rees to 3 more hospitals and 3 medical groups, 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. John Herbert Rees' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Rees practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| University of Maryland Medical Center | Available with a free account |
| +4 more sites and 3 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 University of Maryland Medical System and 6.2K+ hospitals, with verified contacts in the same login.
Dr. John Herbert Rees is one of 626 diagnostic radiologists in Maryland
Diagnostic radiology is Dr. Rees' primary specialty in the NPI Registry, under taxonomy code 2085R0202X. Dr. Rees is board certified in diagnostic radiology by the American Board of Radiology. Dmand AI has Dr. Rees' licenses on file in 11 states: Maryland, Florida, Arizona, Ohio, Virginia, District of Columbia, Texas, Delaware, Pennsylvania, Colorado and New Mexico.
Specialties and state licenses
- Diagnostic radiology, MarylandPrimary
- Florida license
- Arizona license
- Ohio license
- Virginia license
- District of Columbia license
- Texas license
- Delaware license
- Pennsylvania license
- Colorado license
- New Mexico license
Diagnostic radiologists near Dr. Rees
Counts of diagnostic radiologists 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. John Herbert Rees billed Medicare for 2,257 services in 2024
CMS data shows 2,257 Medicare services from Dr. Rees across 30 procedure codes in 2024, for 1,567 Medicare patients. Medicare paid $95,213 for them.
Dr. Rees' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Imaging
- 2023: 1,9202024: 2,25718%
Where Dr. Rees' Medicare services took place, 2024
- In an office1306%
- In a facility2,12794%
Dr. Rees compared with the Maryland median for diagnostic radiologists, 2024
- Dr. Rees
- Maryland median
- Medicare services
- 2,257vs 5,24157% below
- Medicare patients
- 1,567vs 1,94419% below
Medians across 602 diagnostic radiologists in Maryland with Dmand AI profiles that report each measure.
Dr. Rees' 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. Rees?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Rees and other diagnostic radiologists in Maryland.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John Herbert Rees treated 1,567 Medicare patients in 2024, average age 73
CMS counts 1,567 Medicare patients who saw Dr. Rees in 2024. The largest group is 65 to 74, with 584 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 20% are also on Medicaid. Their average risk score is 1.94, 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. Rees' median patient age at 69, with 54% women.
Dr. Rees' Medicare patients by age, 2024
Dr. Rees' Medicare patients by sex, 2024
- Women84654%
- Men72146%
Chronic conditions among Dr. Rees' Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis67%
- Mood disorders43%
- Anxiety41%
- Depression41%
- Ischemic heart disease37%
- Diabetes36%
Share of Medicare patients with each condition. A patient can have several.
Dr. Rees' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 69
Patient panel by sex, all payers
- Women54%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John Herbert Rees scored 75 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 75 out of 100 for Dr. Rees for performance year 2024, reported individually. Dr. Rees accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
- MIPS final score, 2024
- 75 of 100
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. John Herbert Rees has 24 publications on record
Dmand AI links 24 papers to Dr. Rees, published from 2003 to 2025. 2020 was the busiest year, with 7. The most frequent topics are Magnetic Resonance Imaging, Brain and Brain Neoplasms. Dr. Rees has published most often in Acad Radiol. Dr. Rees' most frequent co-authors are Torge Rempe, MD, Anthony A. Mancuso, MD and Dhanashree Abhijit Rajderkar, MD.
Dr. Rees' papers by year, 2003 to 2025
Topics Dr. Rees writes about most
- Magnetic Resonance Imaging
- Brain
- Brain Neoplasms
- Internship and Residency
- Radiology
- Aquaporin 4
- Autoantibodies
- Clinical Competence
Dr. Rees' most frequent co-authors
- Torge Rempe, MD5 shared papers
- Anthony A. Mancuso, MD4 shared papers
- Dhanashree Abhijit Rajderkar, MD4 shared papers
Recent publications by Dr. Rees
Magn Reson Imaging Clin N Am
Magn Reson Imaging Clin N Am
See who Dr. Rees researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Rees works with, so you can find a warm path to the right diagnostic radiologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. John Herbert Rees received $4,418 in industry payments from 2016 to 2025
CMS Open Payments shows 8 general payments to Dr. Rees from 3 drug and device companies from 2016 to 2025. Consulting fees make up the largest share, 88% of the total. Telix Pharmaceuticals paid the most, $4,050.
General payments to Dr. Rees by program year, 2016 to 2025
General payments to Dr. Rees by kind, 2016 to 2025
- Consulting fees$3,90088%
- Food and beverage$51812%
Companies that paid Dr. Rees the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John Herbert Rees graduated from Georgetown University School Of Medicine
Dr. Rees graduated from Georgetown University School Of Medicine in 1981. Dr. Rees is a member of ACR, ASNR and RSNA.
- Medical school
- Board certified in diagnostic radiology
- Board certified in neuroradiology
Source: Dmand AI Professional Profile Data
Sources for Dr. John Herbert Rees'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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (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. John Herbert Rees
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 Herbert Rees' NPI number?
Dr. John Herbert Rees' NPI number is 1033199344. It was assigned on January 20, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John Herbert Rees?
Dr. John Herbert Rees is a diagnostic radiologist in Baltimore, Maryland. The primary specialty in the NPI Registry is Diagnostic Radiology Physician (taxonomy code 2085R0202X).
Where does Dr. John Herbert Rees practice?
Dr. Rees practices at 22 South Greene Street, Baltimore, MD 21201. Dr. Rees' primary practice is University of Maryland Medical Center in Baltimore, Maryland, part of University of Maryland Medical System. Dmand AI also links Dr. Rees to 3 hospitals and 3 medical groups.
What is Dr. John Herbert Rees' office phone number?
The practice phone on file for Dr. Rees is (410) 328-8667.
What is Dr. John Herbert Rees' medical license number?
Dr. Rees' Maryland license number on file is D0047894, one of the licenses on file in 11 states.
Which states has Dr. John Herbert Rees been licensed in?
Dmand AI has state licenses on file for Dr. Rees in Maryland (1995 to 2025), Florida (1997 to 2026), Arizona (2004 to 2021), Ohio (2002 to 2021), Virginia (2001 to 2014), District of Columbia (2000 to 2013), Texas (1991 to 2013), Delaware (2002 to 2011), Pennsylvania (2002 to 2010), Colorado (2004 to 2009) and New Mexico (1986 to 1993).
Which hospitals is Dr. John Herbert Rees affiliated with?
Dr. Rees practices at University of Maryland Medical Center in Baltimore, Maryland. Dr. Rees is also affiliated with University of Maryland Medical Center Midtown Campus. Dmand AI links Dr. Rees to 3 more hospitals.
What medical group is Dr. John Herbert Rees part of?
Dr. Rees is linked to University of Maryland Diagnostic Imaging Specialists. Dmand AI links Dr. Rees to 3 more medical groups.
Does Dr. John Herbert Rees accept Medicare?
Yes. CMS data shows Dr. Rees billed Medicare for 2,257 services in 2024, and Dr. Rees accepts Medicare assignment.
What is Dr. John Herbert Rees' MIPS score?
Dr. Rees' MIPS final score for performance year 2024 is 75 out of 100, reported individually.
Show 8 more questionsShow fewer questions
How many Medicare patients does Dr. John Herbert Rees see?
CMS counts 1,567 Medicare patients who saw Dr. Rees in 2024, with an average age of 73.
Is Dr. John Herbert Rees board certified?
Yes. Dr. Rees is board certified in diagnostic radiology by the American Board of Radiology.
What services does Dr. John Herbert Rees bill to Medicare?
In 2024, Dr. Rees' most billed Medicare services were diagnostic imaging (70450), diagnostic imaging (70553) and diagnostic imaging (72125).
Where did Dr. John Herbert Rees go to medical school?
Dr. Rees graduated from Georgetown University School Of Medicine in 1981.
Has Dr. John Herbert Rees received payments from drug or device companies?
CMS Open Payments shows $4,418 in general payments to Dr. Rees from 3 companies from 2016 to 2025. The largest total came from Telix Pharmaceuticals.
How long has Dr. John Herbert Rees been practicing?
Dr. Rees graduated from medical school in 1981, 45 years ago.
Does Dr. John Herbert Rees do research?
Dmand AI links 24 publications to Dr. Rees, published from 2003 to 2025.
Who does Dr. John Herbert Rees publish with?
Dr. Rees' most frequent co-authors are Torge Rempe, MD (5 shared papers), Anthony A. Mancuso, MD (4 shared papers) and Dhanashree Abhijit Rajderkar, MD (4 shared papers).
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