Quick answers
- Does Jorge A. Diaz Castro accept Medicare assignment?
- Yes. Medicare's clinician data says Jorge A. Diaz Castro 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 Jorge A. Diaz Castro see?
- In 2024, CMS data shows 783 Original Medicare patients and 152,499 services for Jorge A. Diaz Castro. This counts Original Medicare only and measures volume, not quality.
- What is Jorge A. Diaz Castro's NPI number?
- 1558517987. 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 Jorge A. Diaz Castro, 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 | 783 |
|---|---|
| Services billed to Medicare | 152,499 |
| Different services or procedures | 200 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Injection, darbepoetin alfa, 1 microgram (non-esrd use) (J0881)15,480 services
- Injection, pembrolizumab, 1 mg (J9271)13,000 services
- Injection, denosumab, 1 mg (J0897)5,520 services
- Injection, aprepitant, 1 mg (J0185)4,290 services
- Injection, ferric derisomaltose, 10 mg (J1437)4,000 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%
- Arthritis57%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)38%
- Chronic kidney disease36%
- Diabetes35%
Hospitals where Jorge A. Diaz Castro works
Medicare's Facility Affiliation Data lists Jorge A. Diaz Castro 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.
- 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 Jorge A. Diaz Castro is enrolled with Medicare (CMS data updated October 2, 2026).
- 3601 Cci Dr NWHuntsville, AL 35805 (256) 705‑4224
Group practices
Medicare enrollment lists Jorge A. Diaz Castro as a member of this group (CMS data updated October 2, 2026).
- Oncology Specialties, P.C.109 clinicians in the group
Specialties
- Hematology/Oncologyprimary
Other hematologist-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 | 2004 (22 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1558517987 |
| 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