Dr. John O. Thayer Jr., MD
- Medicare services, 2021
- 295
- Part D claims, 2024
- 11
- Industry payments
- $2,120
- Affiliated sites
- 2
- Medical groups
- 2
- Practice address
- 1000 Asylum Ave Rm 1004 Rm 1004, Hartford, CT 06105-1701
- Practice phone
- Call (860) 714-4332
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Trinity Health Of New England Medical Group
Multi-specialty group site · Hartford, Connecticut
Find Dr. Thayer'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. John O. Thayer Jr. is a cardiothoracic surgeon in Hartford, Connecticut
Dr. Thayer practices at Trinity Health Of New England Medical Group in Hartford, Connecticut.
Dr. Thayer's NPI, 1942293956, was assigned on August 24, 2005. Dr. Thayer graduated from Warren Alpert Medical School of Brown University in 1977. Dr. Thayer holds Connecticut license 028081.
- NPI
- 1942293956NPI Registry (opens in a new tab)
- NPI enumeration date
- August 24, 2005
- NPI status
- Active
- Practice phone
- (860) 714-4332
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 75
- Medical school graduation
- 1977
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John O. Thayer Jr. practices at Trinity Health of New England Medical Group in Hartford, Connecticut
Dr. Thayer's primary practice is Trinity Health of New England Medical Group, at 1000 Asylum Ave Rm 1004 Rm 1004, Hartford, CT 06105-1701. The practice phone is (860) 714-4332.
- Trinity Health of New England Medical Group1000 Asylum Ave Rm 1004 Rm 1004, Hartford, CT 06105-1701Phone(860) 714-4332
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John O. Thayer Jr. is affiliated with 2 sites of care and 2 medical groups
Dr. Thayer's primary practice is Trinity Health Of New England Medical Group in Hartford, Connecticut. The medical group on file is Trinity Health Of New England Medical Group. Dmand AI also links Dr. Thayer to 1 more group practice or clinic and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at Dr. John O. Thayer Jr.'s practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Thayer practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Trinity Health Of New England Medical Group | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John O. Thayer Jr. is one of 77 cardiothoracic surgeons in Connecticut
Thoracic surgery (cardiothoracic vascular surgery) is Dr. Thayer's primary specialty in the NPI Registry, under taxonomy code 208G00000X. Dr. Thayer is licensed in Connecticut.
Specialties and state licenses
- Thoracic surgery (cardiothoracic vascular surgery), ConnecticutPrimary
Cardiothoracic surgeons near Dr. Thayer
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. John O. Thayer Jr. billed Medicare for 295 services in 2021
CMS data shows 295 Medicare services from Dr. Thayer across 14 procedure codes in 2021. Medicare paid $29,071 for them.
Dr. Thayer's Medicare services by type, 2020 to 2021
- 2020
- 2021
- Office and hospital visits
- 2020: 3142021: 17345%
- Surgery
- 2020: 862021: 12242%
Where Dr. Thayer's Medicare services took place, 2021
- In an office15954%
- In a facility13646%
Dr. Thayer compared with the Connecticut median for cardiothoracic surgeons, 2021
- Dr. Thayer
- Connecticut median
- Medicare services
- 295vs 1032.9 times
- Part D claims
- 37vs 162.3 times
Medians across 71 cardiothoracic surgeons in Connecticut with Dmand AI profiles that report each measure.
Dr. Thayer's most billed Medicare procedure codes, 2021
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. Thayer and other cardiothoracic surgeons in Connecticut.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John O. Thayer Jr.'s patients have a median age of 74
Across all payers, Dmand AI patient panel data puts Dr. Thayer's median patient age at 74, with 44% women.
Dr. Thayer'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
- Women44%
- Men56%
Source: Dmand AI Patient Panel Data
Dr. John O. Thayer Jr. wrote 11 Medicare Part D claims in 2024
In 2024, Dr. Thayer wrote 11 Medicare Part D claims. They cover 3 drugs, with $3,059 in total drug cost. In 2018, CMS named 27 claims across 2 drugs.
Dr. Thayer's most prescribed drugs by claims, 2019
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, 2018 to 2019
- 2018
- 2019
- Claims for drugs CMS names
- 2018: 272019: 3737%
Drugs named by CMS: 3 in 2019, 2 in 2018.
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
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Dr. John O. Thayer Jr. received $2,120 in industry payments from 2016 to 2019
CMS Open Payments shows 22 general payments to Dr. Thayer from 13 drug and device companies from 2016 to 2019. Travel and lodging make up the largest share, 57% of the total. Edwards Lifesciences Corporation paid the most, $1,312.
General payments to Dr. Thayer by program year, 2016 to 2019
General payments to Dr. Thayer by kind, 2016 to 2019
- Travel and lodging$1,21257%
- Food and beverage$90743%
Companies that paid Dr. Thayer the most, 2016 to 2019
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John O. Thayer Jr. graduated from Warren Alpert Medical School of Brown University
Dr. Thayer graduated from Warren Alpert Medical School of Brown University in 1977.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. John O. Thayer 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 DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| 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)Medicare Part D Prescribers - by Provider (CMS) (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. John O. Thayer 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. John O. Thayer Jr.'s NPI number?
Dr. John O. Thayer Jr.'s NPI number is 1942293956. It was assigned on August 24, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. John O. Thayer Jr.?
Dr. John O. Thayer 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. John O. Thayer Jr. practice?
Dr. Thayer practices at 1000 Asylum Ave Rm 1004 Rm 1004, Hartford, CT 06105-1701. Dr. Thayer's primary practice is Trinity Health Of New England Medical Group in Hartford, Connecticut. Dmand AI also links Dr. Thayer to 1 group practice or clinic and 1 medical group.
What is Dr. John O. Thayer Jr.'s office phone number?
The practice phone on file for Dr. Thayer is (860) 714-4332.
What is Dr. John O. Thayer Jr.'s medical license number?
Dr. Thayer holds Connecticut license 028081.
What medical group is Dr. John O. Thayer Jr. part of?
Dr. Thayer is linked to Trinity Health Of New England Medical Group. Dmand AI links Dr. Thayer to 1 more medical group.
Does Dr. John O. Thayer Jr. accept Medicare?
Yes. CMS data shows Dr. Thayer billed Medicare for 295 services in 2021.
What services does Dr. John O. Thayer Jr. bill to Medicare?
In 2021, Dr. Thayer's most billed Medicare services were office visit, new patient (99204), surgery: lungs and airway (31622) and office visit, established patient (99213).
Where did Dr. John O. Thayer Jr. go to medical school?
Dr. Thayer graduated from Warren Alpert Medical School of Brown University in 1977.
What drugs does Dr. John O. Thayer Jr. prescribe most?
In 2019 Medicare Part D data, Dr. Thayer's most prescribed drugs by claims were Latanoprost, Brimonidine Tartrate and Oxycodone-Acetaminophen.
Has Dr. John O. Thayer Jr. received payments from drug or device companies?
CMS Open Payments shows $2,120 in general payments to Dr. Thayer from 13 companies from 2016 to 2019. The largest total came from Edwards Lifesciences Corporation.
How long has Dr. John O. Thayer Jr. been practicing?
Dr. Thayer graduated from medical school in 1977, 49 years ago.
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