Dr. Geoffrey Douglas Barnes, MD
- Medicare services, 2024
- 626
- Medicare patients, 2024
- 600
- Part D claims, 2024
- 343
- Publications
- 273
- Clinical trials
- 1
- Practice address
- 1500 E Medical Center Dr, Ann Arbor, MI 48109
- Practice phone
- Call (734) 936-4000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
University Hospital
School-Based Health Center · Ann Arbor, Michigan
Find Dr. Barnes' 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. Geoffrey Douglas Barnes is a cardiologist in Ann Arbor, Michigan
Dr. Barnes practices at University Hospital in Ann Arbor, Michigan.
Dr. Barnes' NPI, 1427258532, was assigned on July 18, 2007. Dr. Barnes graduated from University of Michigan Medical School in 2007. Dr. Barnes holds Michigan license 4301090085.
- NPI
- 1427258532NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4981886546
- NPI enumeration date
- July 18, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (734) 936-4000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 45
- Medical school graduation
- 2007
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Geoffrey Douglas Barnes practices at University Hospital in Ann Arbor, Michigan
Dr. Barnes' primary practice is University Hospital, at 1500 E Medical Center Dr, Ann Arbor, MI 48109. The practice phone is (734) 936-4000.
- University Hospital1500 E Medical Center Dr, Ann Arbor, MI 48109Phone(734) 936-4000
Source: Dmand AI Affiliation Data
Dr. Geoffrey Douglas Barnes is affiliated with 3 sites of care and 1 medical group
Dr. Barnes' primary practice is University Hospital in Ann Arbor, Michigan. Dr. Barnes is also affiliated with University Hospital. The medical group on file is University of Michigan Health. Dmand AI also links Dr. Barnes to 1 more group practice or clinic, named with a free account. Dr. Barnes' employer is on file too: a school & student health.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Geoffrey Douglas Barnes' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Barnes practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| University Hospital | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Geoffrey Douglas Barnes is one of 768 cardiologists in Michigan
Cardiovascular disease is Dr. Barnes' primary specialty in the NPI Registry, under taxonomy code 207RC0000X. Dr. Barnes is licensed in Michigan.
Specialties and state licenses
- Cardiovascular disease, MichiganPrimary
Clinical focus
Dmand AI lists aneurysm, aortic atherosclerois, arterial blot clot /embolism, atrial fibrillation and flutter, cerebrovascular disease, chronic hypertension, coronary artery disease and deep vein thrombosis (DVT) among the conditions Dr. Barnes treats.
Cardiologists near Dr. Barnes
Counts of cardiologists 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. Geoffrey Douglas Barnes billed Medicare for 626 services in 2024
CMS data shows 626 Medicare services from Dr. Barnes across 12 procedure codes in 2024, for 600 Medicare patients. Medicare paid $17,344 for them.
Dr. Barnes' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 1,2372024: 48861%
- Office and hospital visits
- 2023: 1032024: 7626%
- Other services
- 2023: 02024: 39
- Imaging
- 2023: 492024: 2353%
Where Dr. Barnes' Medicare services took place, 2024
- In an office45272%
- In a facility17428%
Dr. Barnes compared with the Michigan median for cardiologists, 2024
- Dr. Barnes
- Michigan median
- Medicare services
- 626vs 1,43556% below
- Medicare patients
- 600vs 6447% below
- Part D claims
- 237vs 1,56285% below
Medians across 749 cardiologists in Michigan with Dmand AI profiles that report each measure.
Dr. Barnes' 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. Barnes?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Barnes and other cardiologists in Michigan.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Geoffrey Douglas Barnes treated 600 Medicare patients in 2024, average age 74
CMS counts 600 Medicare patients who saw Dr. Barnes in 2024. The largest group is 65 to 74, with 260 patients. 75% of them have high blood pressure, and 72% have high cholesterol. 12% are also on Medicaid. Their average risk score is 1.85, 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. Barnes' median patient age at 67, with 56% women.
Dr. Barnes' Medicare patients by age, 2024
Dr. Barnes' Medicare patients by sex, 2024
- Women31753%
- Men28347%
Chronic conditions among Dr. Barnes' Medicare patients, 2024
- High blood pressure75%
- High cholesterol72%
- Arthritis49%
- Ischemic heart disease39%
- Chronic kidney disease33%
- Diabetes32%
- Mood disorders32%
- Anxiety28%
Share of Medicare patients with each condition. A patient can have several.
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 67
Patient panel by sex, all payers
- Women56%
- Men44%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Geoffrey Douglas Barnes wrote 343 Medicare Part D claims in 2024
In 2024, Dr. Barnes wrote 343 Medicare Part D claims for 60 patients. 68% of them were for generic drugs. CMS names the drug for 237 of them, across 11 drugs with 11 or more claims each, at $89,244 in total drug cost. In 2023, CMS named 156 claims across 8 drugs.
Dr. Barnes' Part D claims by kind of drug, 2024
- Generic232 claims68%
- Brand-name111 claims32%
Dr. Barnes' 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: 1562024: 23752%
Drugs named by CMS: 11 in 2024, 8 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. Geoffrey Douglas Barnes offers telehealth to Medicare patients
Dr. Barnes accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Barnes as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Geoffrey Douglas Barnes has 273 publications on record
Dmand AI links 273 papers to Dr. Barnes, published from 2008 to 2025. 2024 was the busiest year, with 32. The most frequent topics are Anticoagulants, Atrial Fibrillation and Venous Thromboembolism. Dr. Barnes has published most often in J Thromb Thrombolysis. Dr. Barnes' most frequent co-authors are Scott S. Kaatz, DO, James B. Froehlich, MD and Jay H. Kozlowski, FACC, MD.
Dr. Barnes' papers by year, 2016 to 2025
Topics Dr. Barnes writes about most
- Anticoagulants
- Atrial Fibrillation
- Venous Thromboembolism
- Warfarin
- Administration, Oral
- Hemorrhage
- Stroke
- Pulmonary Embolism
Dr. Barnes' most frequent co-authors
- Scott S. Kaatz, DO46 shared papers
- James B. Froehlich, MD42 shared papers
- Jay H. Kozlowski, FACC, MD26 shared papers
Recent publications by Dr. Barnes
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 cardiologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Geoffrey Douglas Barnes has worked on 1 clinical trial
Dmand AI links Dr. Barnes to 1 clinical trial. 1 is still active or recruiting. Conditions studied include Venous Thromboembolism and Pulmonary Embolism.
Conditions in Dr. Barnes' trials
- Venous Thromboembolism
- Pulmonary Embolism
Recent clinical trials with Dr. Barnes
Implementing Prescriber-Pharmacist Collaborative Care for Evidence-based Anticoagulant Use (opens in a new tab)
Sources: Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)
Dr. Geoffrey Douglas Barnes received $281,648 in industry payments from 2016 to 2025
CMS Open Payments shows 167 general payments to Dr. Barnes from 15 drug and device companies from 2016 to 2025. Consulting fees make up the largest share, 87% of the total. Bristol-Myers Squibb Company paid the most, $104,637.
General payments to Dr. Barnes by program year, 2016 to 2025
General payments to Dr. Barnes by kind, 2016 to 2025
- Consulting fees$245,58387%
- Speaker and faculty fees$19,8407%
- Travel and lodging$9,8513%
- Food and beverage$3,9741%
- Honoraria$2,4001%
Companies that paid Dr. Barnes 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. Geoffrey Douglas Barnes graduated from University of Michigan Medical School
Dr. Barnes graduated from University of Michigan Medical School in 2007.
- Medical school
Source: Dmand AI Professional Profile Data
Dr. Geoffrey Douglas Barnes accepts plans from 12 insurance carriers
Dr. Barnes is in network with 12 carriers, including Excellus BlueCross BlueShield, Health Alliance Plan and Priority Health. Medicare plans come from the most carriers, 9. Check the plan with the practice before a visit.
- Excellus BlueCross BlueShield
- Health Alliance Plan
- Priority Health
- United Healthcare
- Blue Cross Blue Shield of Massachusetts
- Blue Cross Blue Shield of Michigan
- Humana
- Molina
- +4 more carriersWith a free account
Plan types Dr. Barnes accepts, by number of carriers
- Medicare9
- HMO8
- PPO7
- POS4
- EPO2
- Medicaid1
Source: Dmand AI Insurance Network Data
Sources for Dr. Geoffrey Douglas 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 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 |
| Clinical trials and co-investigators | Dmand AI Research LinkageClinicalTrials.gov (National Library of Medicine) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. Geoffrey Douglas 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. Geoffrey Douglas Barnes' NPI number?
Dr. Geoffrey Douglas Barnes' NPI number is 1427258532. It was assigned on July 18, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Geoffrey Douglas Barnes?
Dr. Geoffrey Douglas Barnes is a cardiologist in Ann Arbor, Michigan. The primary specialty in the NPI Registry is Cardiovascular Disease Physician (taxonomy code 207RC0000X).
Where does Dr. Geoffrey Douglas Barnes practice?
Dr. Barnes practices at 1500 E Medical Center Dr, Ann Arbor, MI 48109. Dr. Barnes' primary practice is University Hospital in Ann Arbor, Michigan. Dmand AI also links Dr. Barnes to 1 group practice or clinic.
What is Dr. Geoffrey Douglas Barnes' office phone number?
The practice phone on file for Dr. Barnes is (734) 936-4000.
What is Dr. Geoffrey Douglas Barnes' medical license number?
Dr. Barnes holds Michigan license 4301090085.
Which hospitals is Dr. Geoffrey Douglas Barnes affiliated with?
Dr. Barnes is affiliated with University Hospital.
What medical group is Dr. Geoffrey Douglas Barnes part of?
Dr. Barnes is linked to University of Michigan Health.
Does Dr. Geoffrey Douglas Barnes accept Medicare?
Yes. CMS data shows Dr. Barnes billed Medicare for 626 services in 2024, and Dr. Barnes accepts Medicare assignment.
Does Dr. Geoffrey Douglas Barnes offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Barnes as offering telehealth services.
How many Medicare patients does Dr. Geoffrey Douglas Barnes see?
CMS counts 600 Medicare patients who saw Dr. Barnes in 2024, with an average age of 74.
Show 8 more questionsShow fewer questions
What services does Dr. Geoffrey Douglas Barnes bill to Medicare?
In 2024, Dr. Barnes' most billed Medicare services were blood vessel study (93970), blood vessel study (93880) and blood vessel study (93923).
Where did Dr. Geoffrey Douglas Barnes go to medical school?
Dr. Barnes graduated from University of Michigan Medical School in 2007.
What drugs does Dr. Geoffrey Douglas Barnes prescribe most?
In 2024 Medicare Part D data, Dr. Barnes' most prescribed drugs by claims were Atorvastatin Calcium, Eliquis and Spironolactone.
Has Dr. Geoffrey Douglas Barnes received payments from drug or device companies?
CMS Open Payments shows $281,648 in general payments to Dr. Barnes from 15 companies from 2016 to 2025. The largest total came from Bristol-Myers Squibb Company.
How long has Dr. Geoffrey Douglas Barnes been practicing?
Dr. Barnes graduated from medical school in 2007, 19 years ago.
Does Dr. Geoffrey Douglas Barnes do research?
Dmand AI links 273 publications to Dr. Barnes, published from 2008 to 2025. Dr. Barnes has worked on 1 clinical trial.
Who does Dr. Geoffrey Douglas Barnes publish with?
Dr. Barnes' most frequent co-authors are Scott S. Kaatz, DO (46 shared papers), James B. Froehlich, MD (42 shared papers) and Jay H. Kozlowski, FACC, MD (26 shared papers).
What insurance does Dr. Geoffrey Douglas Barnes accept?
Dr. Barnes is in network with 12 carriers, including Excellus BlueCross BlueShield, Health Alliance Plan and Priority Health. Medicare plans come from the most carriers, 9. Check the plan with the practice before a visit.
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