John T. Hamm, M.D.
Medical Oncology Physician · Louisville, KY
John T. Hamm, M.D. is a medical oncology physician with a practice address in Louisville, Kentucky, and NPI 1023075660, issued on Apr 27, 2006. Check the license (Kentucky 22818, as entered in NPPES) on the Kentucky Board of Medical Licensure; the Medicare figures below come from public CMS files.
- Name
- John T. Hamm
- Credential
- M.D.
- Primary taxonomy
- Medical Oncology Physician 207RX0202X
- License number
- 22818 KY
Self-reported in NPPES; status is on the state search - Practice location
- 315 E Broadway, Louisville, KY 40202
- Phone
- (502) 629-2500
- Enumerated
- Apr 27, 2006
- Record last updated
- Jan 19, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (502) 629-3166
- Medicaid IDs
- 64228182 KY
200042640 IN - Medicare enrollment
- Enrolled (PECOS I20101221000803); accepts Medicare assignment
- Medical or professional school
- Vanderbilt University School Of Medicine, 1982
- Entity
- Type 1 · individual
8 nearest medical oncology physician records → All 59 in Kentucky → Look up another NPI →
Also registered at 315 E Broadway
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Charity Burke, M.D.Orthopaedic Hand Surgery Physician1396888459
- Evangeline Ceridan, ARNPNurse Practitioner1619933199
Verify John T. Hamm in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersKentucky Board of Medical Licensure
Search for license 22818Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
69% more Medicare Part D claims than the average medical oncology physician in 2024
1,188 Medicare Part D claims for 168 beneficiaries, against an average of 703 among the 4,230 providers of this specialty who prescribed in Part D. Brand-name drugs were 19% of claims. 129 claims were for opioids.
Most prescribed
- Ondansetron Hcl138 claims
- Promethazine Hcl93 claims
- Dexamethasone70 claims
- Hydrocodone-Acetaminophen67 claims
- Pantoprazole Sodium65 claims
- Levothyroxine Sodium64 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 100 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $10,789.74
9 payments; by number, the most common kind was food and beverage; the largest payer was Jazz Pharmaceuticals Inc. The 3,343 providers of this specialty with any payment received $11,773.47 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
One hospital affiliation
- Norton Hospitals, IncLouisville, KY · Acute Care Hospitals2 of 5 stars
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
John T. Hamm among 59 medical oncology physician records in Kentucky
John T. Hamm, M.D. is one of 59 medical oncology physician records with a practice address in Kentucky. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 19% of them.
- NPI issued2006 · 19% of these records are older, 46% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 75% of these records are
- Graduated1982 · median 2001 among the 44 with a school on file
- Record last updated2021 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RX0202X and a Kentucky practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Medical Oncology Physician providers in Kentucky
There are 59 medical oncology physician records in Kentucky.
All 59 in Kentucky → Every provider in Louisville → Medical Oncology Physician nationwide →
The 8 medical oncology physician records with the nearest ZIP codes
- Paul Arena, M.D.Louisville, KY 402021558335265
- Joseph Flynn, D.O., MPHLouisville, KY 402021518939933
- Renato Larocca, M.D.Louisville, KY 402021598738932
- Douglas Nelson, M.D.Louisville, KY 402021497720049
- Thomas Woodcock, M.D.Louisville, KY 402021912965062
- Don Stevens, M.D.Louisville, KY 402071952369621
- Vijay Raghavan, MDLouisville, KY 402151316948995
- Subhash Sheth, MDLouisville, KY 402151942201652
Common questions
What is John T. Hamm, M.D.'s NPI number?
John T. Hamm, M.D.'s National Provider Identifier (NPI) is 1023075660, issued on Apr 27, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John T. Hamm, M.D. located?
The NPPES record lists a practice address at 315 E Broadway, Louisville, KY, 40202. Phone: (502) 629-2500. Providers update this record themselves, so call before visiting.
How can I verify John T. Hamm, M.D.'s license?
NPPES lists Kentucky license number 22818, as entered by the provider. Search the Kentucky Board of Medical Licensure at https://web1.ky.gov/GenSearch/LicenseSearch.aspx?AGY=5. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John T. Hamm, M.D. prescribe under Medicare Part D?
In 2024, John T. Hamm, M.D. had 1,188 Medicare Part D claims for 168 beneficiaries; the average among medical oncology physician prescribers was 703. Part D covers Medicare prescriptions only.
What is John T. Hamm, M.D.'s MIPS final score?
The 2023 MIPS final score is 100 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.