Quick answers
- Does Gregory L. Ortega accept Medicare assignment?
- Yes. Medicare's clinician data says Gregory L. Ortega 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 Gregory L. Ortega see?
- In 2024, CMS data shows 387 Original Medicare patients and 154,575 services for Gregory L. Ortega. This counts Original Medicare only and measures volume, not quality.
- What is Gregory L. Ortega's NPI number?
- 1720037989. 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 Gregory L. Ortega, 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 | 387 |
|---|---|
| Services billed to Medicare | 154,575 |
| Different services or procedures | 147 |
| Participating Medicare provider | Yes |
| Average age of these patients | 77 |
Most frequent services
- Injection, ferric carboxymaltose, 1 mg (J1439)31,500 services
- Injection, ferumoxytol, for treatment of iron deficiency anemia, 1 mg (non-esrd use) (Q0138)18,877 services
- Injection, denosumab, 1 mg (J0897)6,002 services
- Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml (Q9967)3,070 services
- Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count (85025)1,235 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%
- Chronic kidney disease53%
- Arthritis47%
- Ischemic heart disease46%
- Diabetes39%
Hospitals where Gregory L. Ortega works
Medicare's Facility Affiliation Data lists Gregory L. Ortega 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.
- AdventHealth DelandDeland, FL · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 100045
- AdventHealth Fish MemorialOrange City, FL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 100072
- AdventHealth OrlandoOrlando, FL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 100007
- Central Florida Lake Monroe HospitalSanford, FL · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 100161
- Oviedo Medical CenterOviedo, FL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 100329
Practice locations
Addresses where Gregory L. Ortega is enrolled with Medicare (CMS data updated October 2, 2026).
- 2100 W 1st StSanford, FL 32771 (407) 323‑2250
- 2776 Enterprise Rd, Suite 100Orange City, FL 32763 (386) 774‑1223
Group practices
Medicare enrollment lists Gregory L. Ortega as a member of this group (CMS data updated October 2, 2026).
- Mid-Florida Cancer Centers LLC13 clinicians in the group
Specialties
- Hematology/Oncologyprimary
- Internal Medicinealso
Other hematologist-oncologists in Sanford
Clinicians with the same Medicare primary specialty in Sanford, FL — not a recommendation.
Other clinicians in Mid-Florida Cancer Centers LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1979 (47 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1720037989 |
| 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