Dr. Brett E. Fenster, MD
- Medicare services, 2017
- 525
- Medicare patients, 2024
- 18
- Part D claims, 2024
- 4,058
- Publications
- 27
- Clinical trials
- 2
- Practice address
- 2045 Franklin St, Denver, CO 80205
- Practice phone
- Call (303) 764-4442
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Surgery Center - Ambulatory at Franklin Medical Offices
Surgery Center - Medicare-Certified · Denver, Colorado
Find Dr. Fenster's 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. Brett E. Fenster is a cardiologist in Denver, Colorado
Dr. Fenster practices at Surgery Center - Ambulatory at Franklin Medical Offices in Denver, Colorado.
Dr. Fenster's NPI, 1649267964, was assigned on October 3, 2005. Dr. Fenster graduated from University of Chicago, Pritzker School of Medicine in 1999. Dr. Fenster holds Colorado license 43851.
- NPI
- 1649267964NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0648204529
- NPI enumeration date
- October 3, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (303) 764-4442
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 53
- Medical school graduation
- 1999
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Brett E. Fenster practices at Surgery Center - Ambulatory at Franklin Medical Offices in Denver, Colorado
Dr. Fenster's primary practice is Surgery Center - Ambulatory at Franklin Medical Offices, at 2045 Franklin St, Denver, CO 80205. The practice phone is (303) 764-4442.
- Surgery Center - Ambulatory at Franklin Medical Offices2045 Franklin St, Denver, CO 80205Phone(303) 764-4442
Source: Dmand AI Affiliation Data
Dr. Brett E. Fenster is affiliated with 4 sites of care and 3 medical groups
Dr. Fenster's primary practice is Surgery Center - Ambulatory at Franklin Medical Offices in Denver, Colorado. Dr. Fenster is also affiliated with CommonSpirit - St. Anthony Hospital. The medical group on file is Colorado Permanente Medical Group. Dmand AI also links Dr. Fenster to 2 more medical groups, 1 group practice or clinic and 1 ambulatory surgery 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. Brett E. Fenster's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Fenster practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Surgery Center - Ambulatory at Franklin Medical Offices | Available with a free account |
| +3 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Brett E. Fenster is one of 300 cardiologists in Colorado
Cardiovascular disease is Dr. Fenster's primary specialty in the NPI Registry, under taxonomy code 207RC0000X. Dr. Fenster is licensed in Colorado.
Specialties and state licenses
- Cardiovascular disease, ColoradoPrimary
Cardiologists near Dr. Fenster
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. Brett E. Fenster billed Medicare for 525 services in 2017
CMS data shows 525 Medicare services from Dr. Fenster across 9 procedure codes in 2017, for 18 Medicare patients. Medicare paid $21,588 for them.
Dr. Fenster's Medicare services by type, 2016 to 2017
- 2016
- 2017
- Tests and treatments
- 2016: 1,1502017: 38267%
- Office and hospital visits
- 2016: 4462017: 14368%
Where Dr. Fenster's Medicare services took place, 2017
- In an office5410%
- In a facility47190%
Dr. Fenster compared with the Colorado median for cardiologists, 2017
- Dr. Fenster
- Colorado median
- Medicare services
- 525vs 1,36862% below
- Medicare patients
- 18vs 70897% below
- Part D claims
- 3,913vs 1,3003.0 times
Medians across 290 cardiologists in Colorado with Dmand AI profiles that report each measure.
Dr. Fenster's most billed Medicare procedure codes, 2017
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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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Brett E. Fenster treated 18 Medicare patients in 2024, average age 67
CMS counts 18 Medicare patients who saw Dr. Fenster in 2024. The largest group is 85 and over, with 0 patients. 72% of them have high blood pressure, and 61% have high cholesterol. Their average risk score is 2.49, 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. Fenster's median patient age at 62, with 55% women.
Dr. Fenster's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Chronic conditions among Dr. Fenster's Medicare patients, 2024
- High blood pressure72%
- High cholesterol61%
Share of Medicare patients with each condition. A patient can have several.
Dr. Fenster's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 62
Patient panel by sex, all payers
- Women55%
- Men44%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Brett E. Fenster wrote 4,058 Medicare Part D claims in 2024
In 2024, Dr. Fenster wrote 4,058 Medicare Part D claims for 568 patients. 83% of them were for generic drugs. CMS names the drug for 3,913 of them, across 42 drugs with 11 or more claims each, at $3,038,251 in total drug cost. In 2023, CMS named 3,883 claims across 43 drugs.
Dr. Fenster's Part D claims by kind of drug, 2024
- Generic3,355 claims83%
- Brand-name and other703 claims17%
Dr. Fenster'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.
Drug classes CMS tracks in Dr. Fenster's Part D claims, 2024
- Antibiotics1%36 of 4,058 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 3,8832024: 3,9131%
Drugs named by CMS: 42 in 2024, 43 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
How Dr. Brett E. Fenster takes part in Medicare
Dr. Fenster 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. Brett E. Fenster has 27 publications on record
Dmand AI links 27 papers to Dr. Fenster, published from 2010 to 2023. 2015 was the busiest year, with 5. The most frequent topics are Predictive Value of Tests, Stroke Volume and Ventricular Function, Right. Dr. Fenster has published most often in Pulm Circ. Dr. Fenster's most frequent co-authors are Joyce D. Schroeder, MD, John Kern Buckner, MD and Howard D. Weinberger, MD.
Dr. Fenster's papers by year, 2010 to 2023
Topics Dr. Fenster writes about most
- Predictive Value of Tests
- Stroke Volume
- Ventricular Function, Right
- Magnetic Resonance Imaging, Cine
- Pulmonary Disease, Chronic Obstructive
- Heart Ventricles
- Hypertension, Pulmonary
- Magnetic Resonance Imaging
Dr. Fenster's most frequent co-authors
- Joyce D. Schroeder, MD10 shared papers
- John Kern Buckner, MD7 shared papers
- Howard D. Weinberger, MD5 shared papers
Recent publications by Dr. Fenster
Int J Cardiovasc Imaging
See who Dr. Fenster researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Fenster 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. Brett E. Fenster has worked on 2 clinical trials
Dmand AI links Dr. Fenster to 2 clinical trials. Conditions studied include Hypertension, Pulmonary and Hypertension. National Jewish Health sponsors the most, 2.
Conditions in Dr. Fenster's trials
- Hypertension, Pulmonary
- Hypertension
Recent clinical trials with Dr. Fenster
Regadenoson for Acute Vasoreactivity Testing in Pulmonary Hypertension (opens in a new tab)
Sources: Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)
Dr. Brett E. Fenster received $108,551 in industry payments from 2016 to 2025
CMS Open Payments shows 187 general payments to Dr. Fenster from 9 drug and device companies from 2016 to 2025. Speaker and faculty fees make up the largest share, 63% of the total. Actelion Pharmaceuticals US, Inc. paid the most, $49,797.
General payments to Dr. Fenster by program year, 2016 to 2025
General payments to Dr. Fenster by kind, 2016 to 2025
- Speaker and faculty fees$67,95863%
- Travel and lodging$20,27119%
- Consulting fees$16,52715%
- Food and beverage$3,7343%
- Education$610%
Companies that paid Dr. Fenster 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. Brett E. Fenster graduated from University of Chicago, Pritzker School of Medicine
Dr. Fenster graduated from University of Chicago, Pritzker School of Medicine in 1999.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Brett E. Fenster'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 |
| 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. Brett E. Fenster
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. Brett E. Fenster's NPI number?
Dr. Brett E. Fenster's NPI number is 1649267964. It was assigned on October 3, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Brett E. Fenster?
Dr. Brett E. Fenster is a cardiologist in Denver, Colorado. The primary specialty in the NPI Registry is Cardiovascular Disease Physician (taxonomy code 207RC0000X).
Where does Dr. Brett E. Fenster practice?
Dr. Fenster practices at 2045 Franklin St, Denver, CO 80205. Dr. Fenster's primary practice is Surgery Center - Ambulatory at Franklin Medical Offices in Denver, Colorado. Dmand AI also links Dr. Fenster to 2 medical groups, 1 group practice or clinic and 1 ambulatory surgery center.
What is Dr. Brett E. Fenster's office phone number?
The practice phone on file for Dr. Fenster is (303) 764-4442.
What is Dr. Brett E. Fenster's medical license number?
Dr. Fenster holds Colorado license 43851.
Which hospitals is Dr. Brett E. Fenster affiliated with?
Dr. Fenster is affiliated with CommonSpirit - St. Anthony Hospital.
What medical group is Dr. Brett E. Fenster part of?
Dr. Fenster is linked to Colorado Permanente Medical Group. Dmand AI links Dr. Fenster to 2 more medical groups.
Does Dr. Brett E. Fenster accept Medicare?
Yes. CMS data shows Dr. Fenster billed Medicare for 525 services in 2017, and Dr. Fenster accepts Medicare assignment.
How many Medicare patients does Dr. Brett E. Fenster see?
CMS counts 18 Medicare patients who saw Dr. Fenster in 2024, with an average age of 67.
What services does Dr. Brett E. Fenster bill to Medicare?
In 2017, Dr. Fenster's most billed Medicare services were heart test or procedure (93306), heart test or procedure (93010) and office visit, established patient (99215).
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Where did Dr. Brett E. Fenster go to medical school?
Dr. Fenster graduated from University of Chicago, Pritzker School of Medicine in 1999.
What drugs does Dr. Brett E. Fenster prescribe most?
In 2024 Medicare Part D data, Dr. Fenster's most prescribed drugs by claims were Metoprolol Succinate, Ambrisentan and Furosemide.
Has Dr. Brett E. Fenster received payments from drug or device companies?
CMS Open Payments shows $108,551 in general payments to Dr. Fenster from 9 companies from 2016 to 2025. The largest total came from Actelion Pharmaceuticals US, Inc.
How long has Dr. Brett E. Fenster been practicing?
Dr. Fenster graduated from medical school in 1999, 27 years ago.
Does Dr. Brett E. Fenster do research?
Dmand AI links 27 publications to Dr. Fenster, published from 2010 to 2023. Dr. Fenster has worked on 2 clinical trials.
Who does Dr. Brett E. Fenster publish with?
Dr. Fenster's most frequent co-authors are Joyce D. Schroeder, MD (10 shared papers), John Kern Buckner, MD (7 shared papers) and Howard D. Weinberger, MD (5 shared papers).
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