Quick answers
- Does Katherine O. Castle accept Medicare assignment?
- Yes. Medicare's clinician data says Katherine O. Castle accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Katherine O. Castle see?
- In 2024, CMS data shows 51 Original Medicare patients and 534 services for Katherine O. Castle. This counts Original Medicare only and measures volume, not quality.
- What is Katherine O. Castle's NPI number?
- 1336561539. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Katherine O. Castle, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 51 |
|---|---|
| Services billed to Medicare | 534 |
| Different services or procedures | 25 |
| Participating Medicare provider | Yes |
| Average age of these patients | 71 |
Most frequent services
- Ct guidance for insertion of radiation therapy fields (77014)170 services
- Calculation of radiation therapy dose (77300)47 services
- Radiation treatment management, 5 treatment sessions (77427)46 services
- Design and construction of complex radiation treatment device (77334)40 services
- Obtaining data needed to develop the optimal radiation treatment, 1 treatment area (77280)35 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)75%
- High cholesterol71%
- Anxiety31%
- Diabetes29%
- Arthritis24%
Hospitals where Katherine O. Castle works
Medicare's Facility Affiliation Data lists Katherine O. Castle at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Ascension Saint Thomas HospitalNashville, TN · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 440082
- Tristar Centennial Medical CenterNashville, TN · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 440161
Practice locations
Addresses where Katherine O. Castle is enrolled with Medicare (CMS data updated October 2, 2026).
- 121 Bear XingMt Juliet, TN 37122
- 2011 Church St, Medical Plaza 1 Lower LevelNashville, TN 37236 (615) 284‑7785
- 2200 E 3rd St, Suite 100Chattanooga, TN 37404 (423) 648‑2388
- 4220 Harding PikeNashville, TN 37205
- 504 22nd Ave ESpringfield, TN 37172 (615) 384‑5558
Group practices
Medicare enrollment lists Katherine O. Castle as a member of this group (CMS data updated October 2, 2026).
- Tennessee Oncology PLLC358 clinicians in the group
Specialties
- Radiation Oncologyprimary
Other radiation oncologists in Tennessee
Clinicians with the same Medicare primary specialty in Tennessee — not a recommendation.
Other clinicians in Tennessee Oncology PLLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2009 (17 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1336561539 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians