Quick answers
- Does John F. Gleason Jr. accept Medicare assignment?
- Yes. Medicare's clinician data says John F. Gleason Jr. 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 John F. Gleason Jr. see?
- In 2024, CMS data shows 689 Original Medicare patients and 6,180 services for John F. Gleason Jr.. This counts Original Medicare only and measures volume, not quality.
- What is John F. Gleason Jr.'s NPI number?
- 1457591539. 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 John F. Gleason Jr., 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 | 689 |
|---|---|
| Services billed to Medicare | 6,180 |
| Different services or procedures | 47 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Ct guidance for insertion of radiation therapy fields (77014)1,575 services
- Intensity modulated treatment delivery, single or multiple fields/arcs,via narrow spatially and temporally modulated beams, binary, dynamic mlc, per treatment session (G6015)1,223 services
- Calculation of radiation therapy dose (77300)572 services
- Radiation treatment delivery,3 or more separate treatment areas, custom blocking, tangential ports, wedges, rotational beam, compensators, electron beam; 6-10 mev (G6012)468 services
- Design and construction of complex radiation treatment device (77334)412 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%
- High cholesterol75%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)75%
- Arthritis54%
- Ischemic heart disease38%
- Diabetes36%
Hospitals where John F. Gleason Jr. works
Medicare's Facility Affiliation Data lists John F. Gleason Jr. 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.
- Athens Limestone HospitalAthens, AL · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 010079
- Crestwood Medical CenterHuntsville, AL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 010131
- Huntsville HospitalHuntsville, AL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 010039
Practice locations
Addresses where John F. Gleason Jr. is enrolled with Medicare (CMS data updated October 2, 2026).
- 201 Sivley Rd SW, Suite 10Huntsville, AL 35801 (256) 319‑5400
- 3601 Cci Dr NW, Suite 10Huntsville, AL 35805 (256) 319‑5400
Group practices
Medicare enrollment lists John F. Gleason Jr. as a member of this group (CMS data updated October 2, 2026).
- Oncology Specialties, P.C.109 clinicians in the group
Specialties
- Radiation Oncologyprimary
Other radiation oncologists in Huntsville
Clinicians with the same Medicare primary specialty in Huntsville, AL — not a recommendation.
Other clinicians in Oncology Specialties, P.C.
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2008 (18 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1457591539 |
| 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