Dr. John T. Hamm, MD
- Medicare services, 2024
- 1,443
- Medicare patients, 2024
- 246
- Part D claims, 2024
- 1,188
- Publications
- 4
- Clinical trials
- 3
- Practice address
- 200 East Chestnut Street, Louisville, KY 40202
- Practice phone
- Call (502) 629-8000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Hamm'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 T. Hamm is a medical oncologist in Louisville, Kentucky
Dr. Hamm practices at Norton Hospital in Louisville, Kentucky, part of Norton Healthcare.
Dr. Hamm's NPI, 1023075660, was assigned on April 27, 2006. Dr. Hamm graduated from Vanderbilt University School of Medicine in 1982. Dr. Hamm holds Kentucky license 22818.
- NPI
- 1023075660NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2062600802
- NPI enumeration date
- April 27, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (502) 629-8000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 70
- Medical school graduation
- 1982
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John T. Hamm practices at Norton Hospital in Louisville, Kentucky
Dr. Hamm's primary practice is Norton Hospital, at 200 East Chestnut Street, Louisville, KY 40202 in Jefferson County. The practice phone is (502) 629-8000.
- Norton Hospital200 East Chestnut Street, Louisville, KY 40202 · Jefferson CountyPhone(502) 629-8000
Source: Dmand AI Affiliation Data
Dr. John T. Hamm is affiliated with 3 sites of care and 1 medical group
Dr. Hamm's primary practice is Norton Hospital in Louisville, Kentucky, part of Norton Healthcare. Dr. Hamm is also affiliated with Norton Clark Hospital. The medical group on file is Norton Cancer Institute. Dmand AI also links Dr. Hamm to 1 more group practice or clinic, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. John T. Hamm's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Hamm practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Norton Hospital | 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. John T. Hamm is one of 50 medical oncologists in Kentucky
Medical oncology is Dr. Hamm's primary specialty in the NPI Registry, under taxonomy code 207RX0202X. Dr. Hamm is licensed in Kentucky.
Specialties and state licenses
- Medical oncology, KentuckyPrimary
Medical oncologists near Dr. Hamm
Counts of medical oncologists 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 T. Hamm billed Medicare for 1,443 services in 2024
CMS data shows 1,443 Medicare services from Dr. Hamm across 7 procedure codes in 2024, for 246 Medicare patients. Medicare paid $76,341 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Hamm's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 9382024: 9986%
- Other services
- 2023: 02024: 445
Dr. Hamm compared with the Kentucky median for medical oncologists, 2024
- Dr. Hamm
- Kentucky median
- Medicare services
- 1,443vs 6002.4 times
- Medicare patients
- 246vs 2269% above
- Part D claims
- 1,019vs 59870% above
Medians across 56 medical oncologists in Kentucky with Dmand AI profiles that report each measure.
Dr. Hamm'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. Hamm and other medical oncologists in Kentucky.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John T. Hamm treated 246 Medicare patients in 2024, average age 73
CMS counts 246 Medicare patients who saw Dr. Hamm in 2024. The largest group is 65 to 74, with 125 patients. 75% of them have high blood pressure, and 71% have high cholesterol. 14% are also on Medicaid. Their average risk score is 2.32, 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. Hamm's median patient age at 72, with 65% women.
Dr. Hamm's Medicare patients by age, 2024
Dr. Hamm's Medicare patients by sex, 2024
- Women15864%
- Men8836%
Chronic conditions among Dr. Hamm's Medicare patients, 2024
- High blood pressure75%
- High cholesterol71%
- Cancer70%
- Arthritis48%
- COPD39%
- Ischemic heart disease39%
- Anxiety35%
- Chronic kidney disease34%
Share of Medicare patients with each condition. A patient can have several.
Dr. Hamm's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 72
Patient panel by sex, all payers
- Women65%
- Men35%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John T. Hamm wrote 1,188 Medicare Part D claims in 2024
In 2024, Dr. Hamm wrote 1,188 Medicare Part D claims for 168 patients. 81% of them were for generic drugs. CMS names the drug for 1,019 of them, across 31 drugs with 11 or more claims each, at $1,736,193 in total drug cost. In 2023, CMS named 1,229 claims across 37 drugs.
Dr. Hamm's Part D claims by kind of drug, 2024
- Generic962 claims81%
- Brand-name226 claims19%
Dr. Hamm'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. Hamm's Part D claims, 2024
- Opioids11%129 of 1,188 claims
- Antibiotics7%81 of 1,188 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: 1,2292024: 1,01917%
Drugs named by CMS: 31 in 2024, 37 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. John T. Hamm scored 84 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 84 out of 100 for Dr. Hamm for performance year 2024, reported as part of a group. Dr. Hamm accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Hamm's MIPS scores, performance year 2024
- 84of 100Final score
- 73.7of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 60of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. John T. Hamm has 4 publications on record
Dmand AI links 4 papers to Dr. Hamm, published from 2022 to 2024. Dr. Hamm's most frequent co-authors are David L. Bajor, MD, Elizabeth Emily Bennett, MD and Adam M. Brufsky, MD.
Dr. Hamm's most frequent co-authors
- David L. Bajor, MD1 shared paper
- Elizabeth Emily Bennett, MD1 shared paper
- Adam M. Brufsky, MD1 shared paper
Recent publications by Dr. Hamm
See who Dr. Hamm researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Hamm works with, so you can find a warm path to the right medical oncologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. John T. Hamm has worked on 3 clinical trials
Dmand AI links Dr. Hamm to 3 clinical trials. 1 is still active or recruiting. Conditions studied include Carcinoma, Renal Cell, Neoplasm Metastasis and Pancreatic Neoplasms. Open Payments lists research payments to Dr. Hamm that name 3 trials.
Conditions in Dr. Hamm's trials
- Carcinoma, Renal Cell
- Neoplasm Metastasis
- Pancreatic Neoplasms
- Kidney Neoplasms
- Neoplastic Processes
Investigators on the most trials with Dr. Hamm
- Alexander A. Hindenburg, MD2 shared trials
- Wallace Lovell Akerley, MD1 shared trial
- Dawit Gebremichael Aregawi, MD1 shared trial
Recent clinical trials with Dr. Hamm
Study of Telisotuzumab Vedotin (ABBV-399) in Participants With Previously Treated c-Met+ Non-Small Cell Lung Cancer (opens in a new tab)
Sources: Open Payments (CMS), 2025 data, released July 7, 2026; Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)
Dr. John T. Hamm received $64,054 in industry payments from 2016 to 2025
CMS Open Payments shows 95 general payments to Dr. Hamm from 18 drug and device companies from 2016 to 2025. Speaker and faculty fees make up the largest share, 45% of the total. Janssen Pharmaceuticals, Inc paid the most, $20,555. It also lists 11 research payments totaling $4,357 from 2016 to 2024, naming 3 clinical trials.
General payments to Dr. Hamm by program year, 2016 to 2025
General payments to Dr. Hamm by kind, 2016 to 2025
- Speaker and faculty fees$28,80545%
- Consulting fees$18,22328%
- Travel and lodging$8,85514%
- Honoraria$4,5507%
- Other$3,6226%
Companies that paid Dr. Hamm 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. John T. Hamm graduated from Vanderbilt University School of Medicine
Dr. Hamm graduated from Vanderbilt University School of Medicine in 1982.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. John T. Hamm'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)Clinician Public Reporting: Overall MIPS Performance (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. John T. Hamm
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 T. Hamm's NPI number?
Dr. John T. Hamm's NPI number is 1023075660. It was assigned on April 27, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John T. Hamm?
Dr. John T. Hamm is a medical oncologist in Louisville, Kentucky. The primary specialty in the NPI Registry is Medical Oncology Physician (taxonomy code 207RX0202X).
Where does Dr. John T. Hamm practice?
Dr. Hamm practices at 200 East Chestnut Street, Louisville, KY 40202. Dr. Hamm's primary practice is Norton Hospital in Louisville, Kentucky, part of Norton Healthcare. Dmand AI also links Dr. Hamm to 1 group practice or clinic.
What is Dr. John T. Hamm's office phone number?
The practice phone on file for Dr. Hamm is (502) 629-8000.
What is Dr. John T. Hamm's medical license number?
Dr. Hamm holds Kentucky license 22818.
Which hospitals is Dr. John T. Hamm affiliated with?
Dr. Hamm practices at Norton Hospital in Louisville, Kentucky. Dr. Hamm is also affiliated with Norton Clark Hospital.
What medical group is Dr. John T. Hamm part of?
Dr. Hamm is linked to Norton Cancer Institute.
Does Dr. John T. Hamm accept Medicare?
Yes. CMS data shows Dr. Hamm billed Medicare for 1,443 services in 2024, and Dr. Hamm accepts Medicare assignment.
What is Dr. John T. Hamm's MIPS score?
Dr. Hamm's MIPS final score for performance year 2024 is 84 out of 100, reported as part of a group.
How many Medicare patients does Dr. John T. Hamm see?
CMS counts 246 Medicare patients who saw Dr. Hamm in 2024, with an average age of 73.
Show 7 more questionsShow fewer questions
What services does Dr. John T. Hamm bill to Medicare?
In 2024, Dr. Hamm's most billed Medicare services were office visit, established patient (99214), medicare service (G2211) and hospital inpatient care (99231).
Where did Dr. John T. Hamm go to medical school?
Dr. Hamm graduated from Vanderbilt University School of Medicine in 1982.
What drugs does Dr. John T. Hamm prescribe most?
In 2024 Medicare Part D data, Dr. Hamm's most prescribed drugs by claims were Ondansetron HCl, Promethazine HCl and Dexamethasone.
Has Dr. John T. Hamm received payments from drug or device companies?
CMS Open Payments shows $64,054 in general payments to Dr. Hamm from 18 companies from 2016 to 2025. The largest total came from Janssen Pharmaceuticals, Inc.
How long has Dr. John T. Hamm been practicing?
Dr. Hamm graduated from medical school in 1982, 44 years ago.
Does Dr. John T. Hamm do research?
Dmand AI links 4 publications to Dr. Hamm, published from 2022 to 2024. Dr. Hamm has worked on 3 clinical trials.
Who does Dr. John T. Hamm publish with?
Dr. Hamm's most frequent co-authors are David L. Bajor, MD (1 shared paper), Elizabeth Emily Bennett, MD (1 shared paper) and Adam M. Brufsky, MD (1 shared paper).
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