Quick answers
- Does Gillian A. Ellis accept Medicare assignment?
- Yes. Medicare's clinician data says Gillian A. Ellis 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 Gillian A. Ellis see?
- In 2024, CMS data shows 339 Original Medicare patients and 716 services for Gillian A. Ellis. This counts Original Medicare only and measures volume, not quality.
- What is Gillian A. Ellis's NPI number?
- 1811196215. 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 Gillian A. Ellis, 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 | 339 |
|---|---|
| Services billed to Medicare | 716 |
| Different services or procedures | 11 |
| Participating Medicare provider | Yes |
| Average age of these patients | 77 |
Most frequent services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)314 services
- Hospital discharge day management, more than 30 minutes (99239)194 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)161 services
- Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)22 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%
- Ischemic heart disease59%
- Chronic kidney disease58%
- Arthritis56%
- Heart failure51%
Hospitals where Gillian A. Ellis works
Medicare's Facility Affiliation Data lists Gillian A. Ellis 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.
- Orlando HealthOrlando, FL · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 100006
- Orlando Health South Lake HospitalClermont, FL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 100051
- Orlando Health-Health Central HospitalOcoee, FL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 100030
Practice locations
Addresses where Gillian A. Ellis is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 8; the Medicare profile lists all.
- 17000 Porter RdWinter Garden, FL 34787
- 1900 Don Wickham DrClermont, FL 34711
- 22 W Underwood StOrlando, FL 32806 (407) 648‑3800
- 22 W Underwood St, Fl 4Orlando, FL 32806 (407) 648‑5384
- 32 W Gore StOrlando, FL 32806
Group practices
Medicare enrollment lists Gillian A. Ellis as a member of this group (CMS data updated October 2, 2026).
- Orlando Health Medical Group Inc2,287 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Winter Garden
Clinicians with the same Medicare primary specialty in Winter Garden, FL — not a recommendation.
Other clinicians in Orlando Health Medical Group Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2003 (23 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1811196215 |
| 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