Aortic ValveAortic Valve StenosisFemoral Artery
Dr. David J. Underhill, MD
NPI1851398127
- Medicare services, 2022
- 11
- Part D claims, 2016
- 13
- Publications
- 6
- Industry payments
- $3,484
- Affiliated sites
- 3
- Practice address
- 85 Seymour St, Hartford, CT 06106-5501
- Practice phone
- Call (860) 696-4306
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Hartford Healthcare Medical Group Specialists - Hartford (85 Seymour St)
Multi-specialty group site · Hartford, Connecticut
Find Dr. Underhill'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. David J. Underhill is a cardiothoracic surgeon in Hartford, Connecticut
Dr. Underhill practices at Hartford Healthcare Medical Group Specialists - Hartford (85 Seymour St) in Hartford, Connecticut.
Dr. Underhill's NPI, 1851398127, was assigned on July 1, 2005. Dr. Underhill graduated from University of Vermont College of Medicine in 1980. Dr. Underhill holds Connecticut license 032227.
NPI and contact details
- NPI
- 1851398127NPI Registry (opens in a new tab)
- NPI enumeration date
- July 1, 2005
- NPI status
- Active
- Practice phone
- (860) 696-4306
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 72
- Medical school graduation
- 1980
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. David J. Underhill practices at 2 locations in Hartford, Connecticut
Dr. Underhill's primary practice is Hartford Healthcare Medical Group Specialists - Hartford (85 Seymour St), at 85 Seymour St, Hartford, CT 06106-5501. The practice phone is (860) 696-4306. The NPI Registry lists Dr. Underhill's practice address as 80 Seymour St, Hartford, CT 06106.
- Hartford Healthcare Medical Group Specialists - Hartford (85 Seymour St)Primary85 Seymour St, Hartford, CT 06106-5501Phone(860) 696-4306
- NPI Registry address80 Seymour St, Hartford, CT 06106 · Capitol CountyPhone(860) 524-5905
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; Doctors and Clinicians National Downloadable File (CMS); and Dmand AI Practice Data
Dr. David J. Underhill is affiliated with 3 sites of care and 3 medical groups
Dr. Underhill's primary practice is Hartford Healthcare Medical Group Specialists - Hartford (85 Seymour St) in Hartford, Connecticut. The medical group on file is Hartford HealthCare Medical Group Specialists. Dmand AI also links Dr. Underhill to 2 more group practices and clinics and 2 medical groups, each named with a free account.
Hartford Healthcare Medical Group Specialists - Hartford (85 Seymour St)Primary
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at Dr. David J. Underhill's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Underhill practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Hartford Healthcare Medical Group Specialists - Hartford (85 Seymour St) | Available with a free account |
| +2 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
See the EHR and IT leaders at every site where Dr. Underhill practices
Dmand AI maps EHR vendors, IT decision makers and buying committees across each health system and 6.2K+ hospitals, with verified contacts in the same login.
Dr. David J. Underhill is one of 77 cardiothoracic surgeons in Connecticut
Thoracic surgery (cardiothoracic vascular surgery) is Dr. Underhill's primary specialty in the NPI Registry, under taxonomy code 208G00000X. Dr. Underhill is licensed in Connecticut.
Specialties and state licenses
- Thoracic surgery (cardiothoracic vascular surgery), ConnecticutPrimary
Cardiothoracic surgeons near Dr. Underhill
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. David J. Underhill billed Medicare for 11 services in 2022
CMS data shows 11 Medicare services from Dr. Underhill across 1 procedure code in 2022, all of them office visits. Medicare paid $1,229 for them. Every service was in an office.
Medicare services, 202211
Paid by Medicare$1,229
Procedure codes1
Dr. Underhill's Medicare services by type, 2021 to 2022
- 2021
- 2022
- Office and hospital visits
- 2021: 972022: 1189%
- Surgery
- 2021: 292022: 0100%
Dr. Underhill compared with the Connecticut median for cardiothoracic surgeons, 2022
- Dr. Underhill
- Connecticut median
- Medicare services
- 11vs 10389% below
- Part D claims
- 13vs 1619% below
Medians across 71 cardiothoracic surgeons in Connecticut with Dmand AI profiles that report each measure.
Dr. Underhill's most billed Medicare procedure codes, 2022
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. Underhill?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Underhill and other cardiothoracic surgeons in Connecticut.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. David J. Underhill's patients have a median age of 67
Across all payers, Dmand AI patient panel data puts Dr. Underhill's median patient age at 67, with 25% women.
Dr. Underhill's 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
- Women25%
- Men75%
Source: Dmand AI Patient Panel Data
Dr. David J. Underhill wrote 13 Medicare Part D claims in 2016
In 2016, Dr. Underhill wrote 13 Medicare Part D claims. Every claim was for a generic drug. They cover 1 drug, with $126 in total drug cost.
Part D claims, 201613
Drugs named by CMS1
Total drug cost$126
Dr. Underhill's most prescribed drugs by claims, 2016
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
For MedTech and pharma teams
Find cardiothoracic surgeons like Dr. Underhill by procedure volume and prescribing
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. David J. Underhill has 6 publications on record
Dmand AI links 6 papers to Dr. Underhill, published from 2013 to 2022. 2021 was the busiest year, with 2. The most frequent topics are Extracorporeal Membrane Oxygenation. Dr. Underhill's most frequent co-authors are Jason Aaron Gluck, DO, Muzaffar Ali, DO, MD and Jonathan D. Gates, MD.
Papers6
Years published2013 to 2022
Dr. Underhill's papers by year, 2013 to 2022
Topics Dr. Underhill writes about most
- Extracorporeal Membrane Oxygenation
Dr. Underhill's most frequent co-authors
- Jason Aaron Gluck, DO4 shared papers
- Muzaffar Ali, DO, MD2 shared papers
- Jonathan D. Gates, MD2 shared papers
Recent publications by Dr. Underhill
Critical CareExtracorporeal Membrane OxygenationPatient Discharge
Anti-Bacterial AgentsAortic DiseasesCardiopulmonary Bypass
See who Dr. Underhill researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Underhill 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. David J. Underhill received $3,484 in industry payments from 2016 to 2022
CMS Open Payments shows 37 general payments to Dr. Underhill from 13 drug and device companies from 2016 to 2022. Food and beverage make up the largest share, 71% of the total. Edwards Lifesciences Corporation paid the most, $2,049.
General payments to Dr. Underhill by program year, 2016 to 2022
General payments to Dr. Underhill by kind, 2016 to 2022
$3.5Kin total
- Food and beverage$2,48471%
- Travel and lodging$1,00029%
Companies that paid Dr. Underhill the most, 2016 to 2022
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. David J. Underhill graduated from University of Vermont College of Medicine
Dr. Underhill graduated from University of Vermont College of Medicine in 1980.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. David J. Underhill'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 Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| 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 Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (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. David J. Underhill
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. David J. Underhill's NPI number?
Dr. David J. Underhill's NPI number is 1851398127. It was assigned on July 1, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. David J. Underhill?
Dr. David J. Underhill 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. David J. Underhill practice?
Dr. Underhill practices at 85 Seymour St, Hartford, CT 06106-5501. Dr. Underhill also practices at 80 Seymour St, Hartford, CT 06106. Dr. Underhill's primary practice is Hartford Healthcare Medical Group Specialists - Hartford (85 Seymour St) in Hartford, Connecticut. Dmand AI also links Dr. Underhill to 2 group practices and clinics and 2 medical groups.
What is Dr. David J. Underhill's office phone number?
The practice phone on file for Dr. Underhill is (860) 696-4306.
What is Dr. David J. Underhill's medical license number?
Dr. Underhill holds Connecticut license 032227.
What medical group is Dr. David J. Underhill part of?
Dr. Underhill is linked to Hartford HealthCare Medical Group Specialists. Dmand AI links Dr. Underhill to 2 more medical groups.
Does Dr. David J. Underhill accept Medicare?
Yes. CMS data shows Dr. Underhill billed Medicare for 11 services in 2022.
What services does Dr. David J. Underhill bill to Medicare?
In 2022, Dr. Underhill's most billed Medicare services were office visit, established patient (99214).
Where did Dr. David J. Underhill go to medical school?
Dr. Underhill graduated from University of Vermont College of Medicine in 1980.
What drugs does Dr. David J. Underhill prescribe most?
In 2016 Medicare Part D data, Dr. Underhill's most prescribed drugs by claims were Escitalopram Oxalate.
Show 4 more questionsShow fewer questions
Has Dr. David J. Underhill received payments from drug or device companies?
CMS Open Payments shows $3,484 in general payments to Dr. Underhill from 13 companies from 2016 to 2022. The largest total came from Edwards Lifesciences Corporation.
How long has Dr. David J. Underhill been practicing?
Dr. Underhill graduated from medical school in 1980, 46 years ago.
Does Dr. David J. Underhill do research?
Dmand AI links 6 publications to Dr. Underhill, published from 2013 to 2022.
Who does Dr. David J. Underhill publish with?
Dr. Underhill's most frequent co-authors are Jason Aaron Gluck, DO (4 shared papers), Muzaffar Ali, DO, MD (2 shared papers) and Jonathan D. Gates, MD (2 shared papers).
Selling to thoracic surgery (cardiothoracic vascular surgery) practices?
See cardiothoracic surgeons in Connecticut by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card