Crystal Hamilton McMahan, M.D.
Radiation Oncology Physician · Louisville, KY
Crystal Hamilton McMahan, M.D. is a radiation oncology physician with a practice address in Louisville, Kentucky, and NPI 1396969200, issued on Apr 12, 2007. Check the license (Kentucky 42203, as entered in NPPES) on the Kentucky Board of Medical Licensure; the Medicare figures below come from public CMS files.
- Name
- Crystal Hamilton McMahan
- Credential
- M.D.
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License number
- 42203 KY
Self-reported in NPPES; status is on the state search - Practice location
- 4003 Kresge Way, Louisville, KY 40207
- Phone
- (502) 897-8163
- Enumerated
- Apr 12, 2007
- Record last updated
- Dec 9, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (502) 897-8052
- Medicaid ID
- 7100059430 KY
- Medicare enrollment
- Enrolled (PECOS I20081104000786); accepts Medicare assignment
- Medical or professional school
- University Of Louisville School Of Medicine, 2006
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 88 in Kentucky → Look up another NPI →
Also registered at 4003 Kresge Way
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- David Bizot, M.D.Pulmonary Disease Physician1437131083
- Henry Byrum, MDInternal Medicine Physician1447215181
- Kayla Cash, CSFASurgical Assistant1235005653
Verify Crystal Hamilton McMahan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersKentucky Board of Medical Licensure
Search for license 42203Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
51% fewer Medicare Part D claims than the average radiation oncology physician in 2024
66 Medicare Part D claims for 44 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D. Brand-name drugs were 20% of 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 MIPS final score for 2023 (Medicare payment program): 95.5 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $66.78
3 payments; by number, the most common kind was food and beverage; the largest payer was Novartis Pharmaceuticals Corporation. The 3,275 providers of this specialty with any payment received $1,897.85 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.
Bills Medicare through one group practice
- Baptist Health Medical Group IncLouisville, KY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Crystal Hamilton McMahan among 88 radiation oncology physician records in Kentucky
Crystal Hamilton McMahan, M.D. is one of 88 radiation oncology physician records with a practice address in Kentucky. 89% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 56% of them.
- NPI issued2007 · 56% of these records are older, 40% newer
- In a Medicare fileYes · 89% of these records are
- In the CMS Doctors and Clinicians fileYes · 78% of these records are
- Graduated2006 · median 2004 among the 68 with a school on file
- Record last updated2020 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0001X and a Kentucky practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Radiation Oncology Physician providers in Kentucky
There are 88 radiation oncology physician records in Kentucky.
All 88 in Kentucky → Every provider in Louisville → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Justin Anderson, MDLouisville, KY 402071700381548
- Mark Cornett, M.D.Louisville, KY 402071003873423
- James Eckman, M.D.Louisville, KY 402071477549293
- Benjamin Facer, MDLouisville, KY 402071942825567
- Carole Scharf, M.D.Louisville, KY 402071053307884
- Yong Cha, MD, PHDLouisville, KY 402021568635332
- Andrew Donovan, MDLouisville, KY 402021407353139
- Neal Dunlap, MDLouisville, KY 402021932310422
Common questions
What is Crystal Hamilton McMahan, M.D.'s NPI number?
Crystal Hamilton McMahan, M.D.'s National Provider Identifier (NPI) is 1396969200, issued on Apr 12, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Crystal Hamilton McMahan, M.D. located?
The NPPES record lists a practice address at 4003 Kresge Way, Louisville, KY, 40207. Phone: (502) 897-8163. Providers update this record themselves, so call before visiting.
How can I verify Crystal Hamilton McMahan, M.D.'s license?
NPPES lists Kentucky license number 42203, 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 Crystal Hamilton McMahan, M.D. prescribe under Medicare Part D?
In 2024, Crystal Hamilton McMahan, M.D. had 66 Medicare Part D claims for 44 beneficiaries; the average among radiation oncology physician prescribers was 134. Part D covers Medicare prescriptions only.
What is Crystal Hamilton McMahan, M.D.'s MIPS final score?
The 2023 MIPS final score is 95.5 of 100. 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.