Dr. Jonathan A. Hammond Jr., MD
- Medicare services, 2024
- 108
- Medicare patients, 2024
- 66
- Publications
- 16
- Hospital affiliations
- 3
- Industry payments
- $16,725
- Practice address
- 80 Seymour Street, Hartford, CT 06102
- Practice phone
- Call (860) 545-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Hammond'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 A. Hammond Jr. is a cardiothoracic surgeon in Hartford, Connecticut
Dr. Hammond practices at Hartford Hospital in Hartford, Connecticut, part of Hartford HealthCare.
Dr. Hammond's NPI, 1235115965, was assigned on December 15, 2005. Dr. Hammond graduated from Harvard Medical School in 1984. Dr. Hammond holds Connecticut license 027604.
- NPI
- 1235115965NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2769449453
- NPI enumeration date
- December 15, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (860) 545-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 68
- Medical school graduation
- 1984
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Jonathan A. Hammond Jr. practices at Hartford Hospital in Hartford, Connecticut
Dr. Hammond's primary practice is Hartford Hospital, at 80 Seymour Street, Hartford, CT 06102 in Hartford County. The practice phone is (860) 545-5000.
- Hartford Hospital80 Seymour Street, Hartford, CT 06102 · Hartford CountyPhone(860) 545-5000
Source: Dmand AI Affiliation Data
Dr. Jonathan A. Hammond Jr. is affiliated with 8 sites of care and 4 medical groups
Dr. Hammond's primary practice is Hartford Hospital in Hartford, Connecticut, part of Hartford HealthCare. Dr. Hammond is also affiliated with UConn John Dempsey Hospital. The medical group on file is Hartford HealthCare Medical Group Specialists. Dmand AI also links Dr. Hammond to 1 more hospital, 4 group practices and clinics, 3 medical groups and 1 home health agency, 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. Jonathan A. Hammond Jr.'s practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Hammond practices, 8 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Hartford Hospital | Available with a free account |
| +7 more sites and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Jonathan A. Hammond Jr. is one of 77 cardiothoracic surgeons in Connecticut
Thoracic surgery (cardiothoracic vascular surgery) is Dr. Hammond's primary specialty in the NPI Registry, under taxonomy code 208G00000X. Dr. Hammond is licensed in Connecticut.
Specialties and state licenses
- Thoracic surgery (cardiothoracic vascular surgery), ConnecticutPrimary
Cardiothoracic surgeons near Dr. Hammond
Counts of cardiothoracic surgeons 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 A. Hammond Jr. billed Medicare for 108 services in 2024
CMS data shows 108 Medicare services from Dr. Hammond across 5 procedure codes in 2024, for 66 Medicare patients. Medicare paid $76,056 for them.
Dr. Hammond's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Surgery
- 2023: 692024: 7610%
- Office and hospital visits
- 2023: 212024: 3252%
Where Dr. Hammond's Medicare services took place, 2024
- In an office3230%
- In a facility7670%
Dr. Hammond compared with the Connecticut median for cardiothoracic surgeons, 2024
- Dr. Hammond
- Connecticut median
- Medicare services
- 108vs 103Close to median
- Medicare patients
- 66vs 8018% below
Medians across 71 cardiothoracic surgeons in Connecticut with Dmand AI profiles that report each measure.
Dr. Hammond'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.
Need commercial claims for Dr. Hammond?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Hammond and other cardiothoracic surgeons in Connecticut.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Jonathan A. Hammond Jr. treated 66 Medicare patients in 2024, average age 74
CMS counts 66 Medicare patients who saw Dr. Hammond in 2024. The largest group is 75 to 84, with 33 patients. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 1.45, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Hammond's median patient age at 70, with 21% women.
Dr. Hammond's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Hammond's Medicare patients by sex, 2024
- Women1827%
- Men4873%
Chronic conditions among Dr. Hammond's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Ischemic heart disease75%
- Heart failure53%
- Atrial fibrillation52%
- Arthritis42%
- Diabetes42%
- Chronic kidney disease30%
Share of Medicare patients with each condition. A patient can have several.
Dr. Hammond's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 70
Patient panel by sex, all payers
- Women21%
- Men79%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Jonathan A. Hammond Jr. ranks in the 66th percentile for coronary artery bypass graft (cabg) in Medicare
Dr. Hammond accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 19 procedures of coronary artery bypass graft (cabg) by Dr. Hammond, more than 66% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Hammond ranks in Medicare procedure volume
- Coronary artery bypass graft (CABG)
- 66th percentile19 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Jonathan A. Hammond Jr. has 16 publications on record
Dmand AI links 16 papers to Dr. Hammond, published from 2012 to 2024. 2022 was the busiest year, with 3. The most frequent topics are Heart Transplantation, Postoperative Complications and Coronary Artery Bypass. Dr. Hammond has published most often in J Cardiothorac Vasc Anesth. Dr. Hammond's most frequent co-authors are Jason Aaron Gluck, DO, Abhishek Kumar Jaiswal, MBBS and Joseph A. Radojevic, MD.
Dr. Hammond's papers by year, 2012 to 2024
Topics Dr. Hammond writes about most
- Heart Transplantation
- Postoperative Complications
- Coronary Artery Bypass
- COVID-19
- Heart-Assist Devices
- SARS-CoV-2
- Cardiac Surgical Procedures
- Connecticut
Dr. Hammond's most frequent co-authors
- Jason Aaron Gluck, DO9 shared papers
- Abhishek Kumar Jaiswal, MBBS6 shared papers
- Joseph A. Radojevic, MD6 shared papers
Recent publications by Dr. Hammond
Transplant Proc
J Cardiothorac Vasc Anesth
See who Dr. Hammond researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Hammond works with, so you can find a warm path to the right cardiothoracic surgeons.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Jonathan A. Hammond Jr. received $16,725 in industry payments from 2016 to 2025
CMS Open Payments shows 114 general payments to Dr. Hammond from 20 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 48% of the total. Abbott Laboratories paid the most, $8,393.
General payments to Dr. Hammond by program year, 2016 to 2025
General payments to Dr. Hammond by kind, 2016 to 2025
- Food and beverage$8,04948%
- Speaker and faculty fees$5,77535%
- Travel and lodging$2,90117%
Companies that paid Dr. Hammond 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 A. Hammond Jr. graduated from Harvard Medical School
Dr. Hammond graduated from Harvard Medical School in 1984.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Jonathan A. Hammond Jr.'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)Doctors and Clinicians Utilization Data (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 A. Hammond Jr.
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 A. Hammond Jr.'s NPI number?
Dr. Jonathan A. Hammond Jr.'s NPI number is 1235115965. It was assigned on December 15, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Jonathan A. Hammond Jr.?
Dr. Jonathan A. Hammond Jr. is a cardiothoracic surgeon in Hartford, Connecticut. The primary specialty in the NPI Registry is Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician (taxonomy code 208G00000X).
Where does Dr. Jonathan A. Hammond Jr. practice?
Dr. Hammond practices at 80 Seymour Street, Hartford, CT 06102. Dr. Hammond's primary practice is Hartford Hospital in Hartford, Connecticut, part of Hartford HealthCare. Dmand AI also links Dr. Hammond to 1 hospital, 4 group practices and clinics, 3 medical groups and 1 home health agency.
What is Dr. Jonathan A. Hammond Jr.'s office phone number?
The practice phone on file for Dr. Hammond is (860) 545-5000.
What is Dr. Jonathan A. Hammond Jr.'s medical license number?
Dr. Hammond holds Connecticut license 027604.
Which hospitals is Dr. Jonathan A. Hammond Jr. affiliated with?
Dr. Hammond practices at Hartford Hospital in Hartford, Connecticut. Dr. Hammond is also affiliated with UConn John Dempsey Hospital. Dmand AI links Dr. Hammond to 1 more hospital.
What medical group is Dr. Jonathan A. Hammond Jr. part of?
Dr. Hammond is linked to Hartford HealthCare Medical Group Specialists. Dmand AI links Dr. Hammond to 3 more medical groups.
Does Dr. Jonathan A. Hammond Jr. accept Medicare?
Yes. CMS data shows Dr. Hammond billed Medicare for 108 services in 2024, and Dr. Hammond accepts Medicare assignment.
How many Medicare patients does Dr. Jonathan A. Hammond Jr. see?
CMS counts 66 Medicare patients who saw Dr. Hammond in 2024, with an average age of 74.
What services does Dr. Jonathan A. Hammond Jr. bill to Medicare?
In 2024, Dr. Hammond's most billed Medicare services were office visit, new patient (99205), surgery: heart and blood vessels (33533) and surgery: heart and blood vessels (33508).
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Where did Dr. Jonathan A. Hammond Jr. go to medical school?
Dr. Hammond graduated from Harvard Medical School in 1984.
Has Dr. Jonathan A. Hammond Jr. received payments from drug or device companies?
CMS Open Payments shows $16,725 in general payments to Dr. Hammond from 20 companies from 2016 to 2025. The largest total came from Abbott Laboratories.
How long has Dr. Jonathan A. Hammond Jr. been practicing?
Dr. Hammond graduated from medical school in 1984, 42 years ago.
Does Dr. Jonathan A. Hammond Jr. do research?
Dmand AI links 16 publications to Dr. Hammond, published from 2012 to 2024.
Who does Dr. Jonathan A. Hammond Jr. publish with?
Dr. Hammond's most frequent co-authors are Jason Aaron Gluck, DO (9 shared papers), Abhishek Kumar Jaiswal, MBBS (6 shared papers) and Joseph A. Radojevic, MD (6 shared papers).
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