Katherine Osusky Castle, M.D.
Radiation Oncology Physician · Nashville, TN
Katherine Osusky Castle, M.D. is a radiation oncology physician with a practice address in Nashville, Tennessee, and NPI 1336561539, issued on Jan 8, 2014. Check the license (Tennessee 74568, as entered in NPPES) on the Tennessee Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Katherine Osusky Castle
- Credential
- M.D.
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License number
- 74568 TN
Self-reported in NPPES; status is on the state search - Practice location
- 2004 Hayes St Ste 350, Nashville, TN 37203
- Phone
- (615) 312-3333
- Enumerated
- Jan 8, 2014
- Record last updated
- Jul 24, 2025
- Fax
- (615) 320-7091
- Medicare enrollment
- Enrolled (PECOS I20251010000552); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 132 in Tennessee → Look up another NPI →
Also registered at 2004 Hayes St Ste 350
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jennifer Bober, APRNFamily Nurse Practitioner1740981026
- Sarah Deline, APRNFamily Nurse Practitioner1801254925
- Habib Doss, MDHematology & Oncology Physician1174565543
- Tammy EasterlyFamily Nurse Practitioner1649768805
- Robert Green, M.D.Hematology & Oncology Physician1396741377
- Emily Heymann, PA-CPhysician Assistant1518335223
Verify Katherine Osusky Castle in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTennessee Board of Medical Examiners
Search for license 74568Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
79% fewer Medicare Part D claims than the average radiation oncology physician in 2024
28 Medicare Part D claims for 17 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% 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.
Bills Medicare through one group practice
- Tennessee Oncology PLLCMt Juliet, TN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Katherine Osusky Castle among 132 radiation oncology physician records in Tennessee
Katherine Osusky Castle, M.D. is one of 132 radiation oncology physician records with a practice address in Tennessee. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2014, is newer than 79% of them.
- NPI issued2014 · 79% of these records are older, 17% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated2009 · median 2005 among the 98 with a school on file
- Record last updated2025 · 52% 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 Tennessee 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 Tennessee
There are 132 radiation oncology physician records in Tennessee.
All 132 in Tennessee → Every provider in Nashville → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- James Gray, M.D.Nashville, TN 372031841219938
- Julian Heitz, MDNashville, TN 372031437133139
- Andrew Kennedy, MDNashville, TN 372031467491019
- Casey Lipscomb, MDNashville, TN 372031861609331
- Eleanor Osborne, M.D.Nashville, TN 372031154687499
- Mark Sittig, MDNashville, TN 372031275951519
- Scott Strickler, MDNashville, TN 372031043744477
- Marion Bolin, M.D.Nashville, TN 372051952330672
Common questions
What is Katherine Osusky Castle, M.D.'s NPI number?
Katherine Osusky Castle, M.D.'s National Provider Identifier (NPI) is 1336561539, issued on Jan 8, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Katherine Osusky Castle, M.D. located?
The NPPES record lists a practice address at 2004 Hayes St Ste 350, Nashville, TN, 37203. Phone: (615) 312-3333. Providers update this record themselves, so call before visiting.
How can I verify Katherine Osusky Castle, M.D.'s license?
NPPES lists Tennessee license number 74568, as entered by the provider. Search the Tennessee Board of Medical Examiners at https://www.tn.gov/health/licensure/me.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Katherine Osusky Castle, M.D. prescribe under Medicare Part D?
In 2024, Katherine Osusky Castle, M.D. had 28 Medicare Part D claims for 17 beneficiaries; the average among radiation oncology physician prescribers was 134. Part D covers Medicare prescriptions only.
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.