Dr. Jonathan Alexander, MD
- Medicare services, 2024
- 2,706
- Medicare patients, 2024
- 1,238
- Part D claims, 2024
- 4,478
- Publications
- 12
- Hospital affiliations
- 2
- Practice address
- 100 Reserve Rd, Danbury, CT 06810
- Practice phone
- Call (203) 739-7742
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Nuvance Health Medical Practice CT, Inc.
Danbury, Connecticut
Find Dr. Alexander'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. Jonathan Alexander is a cardiologist in Danbury, Connecticut
Dr. Alexander practices at Nuvance Health Medical Practice CT, Inc. in Danbury, Connecticut.
Dr. Alexander's NPI, 1710921754, was assigned on June 16, 2006. Dr. Alexander graduated from Albert Einstein College of Medicine of Yeshiva University in 1973. Dr. Alexander holds Connecticut license 018828.
- NPI
- 1710921754NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1658435854
- NPI enumeration date
- June 16, 2006
- NPI status
- Active
- Offers telehealth
- Yes
- Practice phone
- (203) 739-7742
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 79
- Medical school graduation
- 1973
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Jonathan Alexander practices at Nuvance Health Medical Practice CT, Inc. in Danbury, Connecticut
Dr. Alexander's primary practice is Nuvance Health Medical Practice CT, Inc., at 100 Reserve Rd, Danbury, CT 06810 in Western Ct County. The practice phone is (203) 739-7742.
- Nuvance Health Medical Practice CT, Inc.100 Reserve Rd, Danbury, CT 06810 · Western Ct CountyPhone(203) 739-7742
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Jonathan Alexander is affiliated with 3 sites of care and 1 medical group
Dr. Alexander's primary practice is Nuvance Health Medical Practice CT, Inc. in Danbury, Connecticut. Dr. Alexander is also affiliated with Northwell Danbury Hospital. The medical group on file is Danbury Medical Group. Dmand AI also links Dr. Alexander to 1 more hospital, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Jonathan Alexander's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Alexander practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Nuvance Health Medical Practice CT, Inc. | 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. Jonathan Alexander is one of 423 cardiologists in Connecticut
Cardiovascular disease is Dr. Alexander's primary specialty in the NPI Registry, under taxonomy code 207RC0000X. Dr. Alexander is licensed in Connecticut.
Specialties and state licenses
- Cardiovascular disease, ConnecticutPrimary
Cardiologists near Dr. Alexander
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. Jonathan Alexander billed Medicare for 2,706 services in 2024
CMS data shows 2,706 Medicare services from Dr. Alexander across 15 procedure codes in 2024, for 1,238 Medicare patients. Medicare paid $162,398 for them.
Dr. Alexander's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,3762024: 1,4203%
- Tests and treatments
- 2023: 1,0012024: 1,12212%
- Imaging
- 2023: 972024: 12731%
- Other services
- 2023: 02024: 37
Where Dr. Alexander's Medicare services took place, 2024
- In an office2,09077%
- In a facility61623%
Dr. Alexander compared with the Connecticut median for cardiologists, 2024
- Dr. Alexander
- Connecticut median
- Medicare services
- 2,706vs 1,35899% above
- Medicare patients
- 1,238vs 68082% above
- Part D claims
- 4,214vs 1,5732.7 times
Medians across 415 cardiologists in Connecticut with Dmand AI profiles that report each measure.
Dr. Alexander'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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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Alexander and other cardiologists in Connecticut.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Jonathan Alexander treated 1,238 Medicare patients in 2024, average age 78
CMS counts 1,238 Medicare patients who saw Dr. Alexander in 2024. The largest group is 75 to 84, with 510 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 16% are also on Medicaid. Their average risk score is 1.66, 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. Alexander's median patient age at 74, with 40% women.
Dr. Alexander's Medicare patients by age, 2024
Dr. Alexander's Medicare patients by sex, 2024
- Women59648%
- Men64252%
Chronic conditions among Dr. Alexander's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis51%
- Ischemic heart disease50%
- Atrial fibrillation39%
- Anxiety33%
- Chronic kidney disease31%
- Diabetes29%
Share of Medicare patients with each condition. A patient can have several.
Dr. Alexander's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 74
Patient panel by sex, all payers
- Women40%
- Men58%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Jonathan Alexander wrote 4,478 Medicare Part D claims in 2024
In 2024, Dr. Alexander wrote 4,478 Medicare Part D claims for 615 patients. 83% of them were for generic drugs. CMS names the drug for 4,214 of them, across 43 drugs with 11 or more claims each, at $829,317 in total drug cost. In 2023, CMS named 4,014 claims across 46 drugs.
Dr. Alexander's Part D claims by kind of drug, 2024
- Generic3,710 claims83%
- Brand-name768 claims17%
Dr. Alexander'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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 4,0142024: 4,2145%
Drugs named by CMS: 43 in 2024, 46 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. Jonathan Alexander offers telehealth to Medicare patients
CMS lists Dr. Alexander as offering telehealth.
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Jonathan Alexander has 12 publications on record
Dmand AI links 12 papers to Dr. Alexander, published from 2010 to 2025. 2019 was the busiest year, with 2. The most frequent topics are Huntington Disease, Neurons and Cell Death. Dr. Alexander has published most often in Hum Mol Genet. Dr. Alexander's most frequent co-authors are Patrick Bronson Reeves, MD, Kwadwo Ansong, MD and Neil Aronin, MD.
Dr. Alexander's papers by year, 2010 to 2025
Topics Dr. Alexander writes about most
- Huntington Disease
- Neurons
- Cell Death
- Disease Models, Animal
- Huntingtin Protein
- Mice, Transgenic
- Nerve Tissue Proteins
- Oxidative Stress
Dr. Alexander's most frequent co-authors
- Patrick Bronson Reeves, MD3 shared papers
- Kwadwo Ansong, MD2 shared papers
- Neil Aronin, MD2 shared papers
Recent publications by Dr. Alexander
See who Dr. Alexander researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Alexander 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. Jonathan Alexander received $35,836 in industry payments from 2016 to 2025
CMS Open Payments shows 196 general payments to Dr. Alexander from 20 drug and device companies from 2016 to 2025. Speaker and faculty fees make up the largest share, 73% of the total. Boehringer Ingelheim Pharmaceuticals, Inc. paid the most, $27,795.
General payments to Dr. Alexander by program year, 2016 to 2025
General payments to Dr. Alexander by kind, 2016 to 2025
- Speaker and faculty fees$26,12373%
- Consulting fees$3,95111%
- Food and beverage$3,80911%
- Travel and lodging$1,7725%
- Education$1821%
Companies that paid Dr. Alexander 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. Jonathan Alexander graduated from Albert Einstein College of Medicine of Yeshiva University
Dr. Alexander graduated from Albert Einstein College of Medicine of Yeshiva University in 1973.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Jonathan Alexander'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand 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 |
| 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 Alexander
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 Alexander's NPI number?
Dr. Jonathan Alexander's NPI number is 1710921754. It was assigned on June 16, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Jonathan Alexander?
Dr. Jonathan Alexander is a cardiologist in Danbury, Connecticut. The primary specialty in the NPI Registry is Cardiovascular Disease Physician (taxonomy code 207RC0000X).
Where does Dr. Jonathan Alexander practice?
Dr. Alexander practices at 100 Reserve Rd, Danbury, CT 06810. Dr. Alexander's primary practice is Nuvance Health Medical Practice CT, Inc. in Danbury, Connecticut. Dmand AI also links Dr. Alexander to 1 hospital.
What is Dr. Jonathan Alexander's office phone number?
The practice phone on file for Dr. Alexander is (203) 739-7742.
What is Dr. Jonathan Alexander's medical license number?
Dr. Alexander holds Connecticut license 018828.
Which hospitals is Dr. Jonathan Alexander affiliated with?
Dr. Alexander is affiliated with Northwell Danbury Hospital. Dmand AI links Dr. Alexander to 1 more hospital.
What medical group is Dr. Jonathan Alexander part of?
Dr. Alexander is linked to Danbury Medical Group.
Does Dr. Jonathan Alexander accept Medicare?
Yes. CMS data shows Dr. Alexander billed Medicare for 2,706 services in 2024.
Does Dr. Jonathan Alexander offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Alexander as offering telehealth services.
How many Medicare patients does Dr. Jonathan Alexander see?
CMS counts 1,238 Medicare patients who saw Dr. Alexander in 2024, with an average age of 78.
Show 7 more questionsShow fewer questions
What services does Dr. Jonathan Alexander bill to Medicare?
In 2024, Dr. Alexander's most billed Medicare services were office visit, established patient (99214), heart test or procedure (93010) and heart test or procedure (93000).
Where did Dr. Jonathan Alexander go to medical school?
Dr. Alexander graduated from Albert Einstein College of Medicine of Yeshiva University in 1973.
What drugs does Dr. Jonathan Alexander prescribe most?
In 2024 Medicare Part D data, Dr. Alexander's most prescribed drugs by claims were Rosuvastatin Calcium, Metoprolol Succinate and Atorvastatin Calcium.
Has Dr. Jonathan Alexander received payments from drug or device companies?
CMS Open Payments shows $35,836 in general payments to Dr. Alexander from 20 companies from 2016 to 2025. The largest total came from Boehringer Ingelheim Pharmaceuticals, Inc.
How long has Dr. Jonathan Alexander been practicing?
Dr. Alexander graduated from medical school in 1973, 53 years ago.
Does Dr. Jonathan Alexander do research?
Dmand AI links 12 publications to Dr. Alexander, published from 2010 to 2025.
Who does Dr. Jonathan Alexander publish with?
Dr. Alexander's most frequent co-authors are Patrick Bronson Reeves, MD (3 shared papers), Kwadwo Ansong, MD (2 shared papers) and Neil Aronin, MD (2 shared papers).
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