Aaron C. Spalding, MD PHD
Radiation Oncology Physician · Louisville, KY
Aaron C. Spalding, MD PHD is a radiation oncology physician with a practice address in Louisville, Kentucky, and NPI 1114983871, issued on Apr 21, 2006. Check the license (Kentucky 42294, as entered in NPPES) on the Kentucky Board of Medical Licensure; the Medicare figures below come from public CMS files.
- Name
- Aaron C. Spalding
- Credential
- MD PHD
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License numbers
- 42294 KY
01059740A IN
4301081806 MI
Self-reported in NPPES; status is on the state search - Practice location
- 676 S Floyd St FL 1, Louisville, KY 40202
- Phone
- (502) 629-4555
- Enumerated
- Apr 21, 2006
- Record last updated
- Mar 25, 2026
- Fax
- (502) 629-4599
- Medicaid IDs
- 710067120 KY
200508490 IN - Medicare enrollment
- Enrolled (PECOS I20090113000761); accepts Medicare assignment
- Medical or professional school
- University Of Colorado School Of Medicine, Denver, 2003
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 88 in Kentucky → Look up another NPI →
Verify Aaron C. Spalding in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersKentucky Board of Medical Licensure
Search for license 42294Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.8 times the Medicare Part D claims of the average radiation oncology physician in 2024
376 Medicare Part D claims for 143 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D. Brand-name drugs were 5% of claims. 88 claims were for opioids.
Most prescribed
- Dexamethasone70 claims
- Gabapentin41 claims
- Hydrocodone-Acetaminophen39 claims
- Diazepam26 claims
- Lidocaine Hcl Viscous25 claims
- Oxycodone Hcl23 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).
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.
Aaron C. Spalding among 88 radiation oncology physician records in Kentucky
Aaron C. Spalding, MD PHD 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 2006, is newer than 23% of them.
- NPI issued2006 · 23% of these records are older, 44% newer
- In a Medicare fileYes · 89% of these records are
- In the CMS Doctors and Clinicians fileYes · 78% of these records are
- Graduated2003 · median 2004 among the 68 with a school on file
- Record last updated2026 · 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
- Yong Cha, MD, PHDLouisville, KY 402021568635332
- Andrew Donovan, MDLouisville, KY 402021407353139
- Neal Dunlap, MDLouisville, KY 402021932310422
- Michael Hahl, M.D.Louisville, KY 402021811954449
- Baby Jose, MDLouisville, KY 402021568570497
- Alden KlarerLouisville, KY 402021104211341
- Adrianna Masters, MD, PHDLouisville, KY 402021306265327
- Phylicia Odume, DOLouisville, KY 402021417586413
Common questions
What is Aaron C. Spalding, MD PHD's NPI number?
Aaron C. Spalding, MD PHD's National Provider Identifier (NPI) is 1114983871, issued on Apr 21, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Aaron C. Spalding, MD PHD located?
The NPPES record lists a practice address at 676 S Floyd St FL 1, Louisville, KY, 40202. Phone: (502) 629-4555. Providers update this record themselves, so call before visiting.
How can I verify Aaron C. Spalding, MD PHD's license?
NPPES lists Kentucky license number 42294, 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 Aaron C. Spalding, MD PHD prescribe under Medicare Part D?
In 2024, Aaron C. Spalding, MD PHD had 376 Medicare Part D claims for 143 beneficiaries; the average among radiation oncology physician prescribers was 134. Part D covers Medicare prescriptions only.
What is Aaron C. Spalding, MD PHD'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.