Quick answers
- Does Marissa A. Stewart accept Medicare assignment?
- Yes. Medicare's clinician data says Marissa A. Stewart 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 Marissa A. Stewart see?
- In 2024, CMS data shows 221 Original Medicare patients and 429 services for Marissa A. Stewart. This counts Original Medicare only and measures volume, not quality.
- What is Marissa A. Stewart's NPI number?
- 1033707542. 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 Marissa A. Stewart, 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 | 221 |
|---|---|
| Services billed to Medicare | 429 |
| Different services or procedures | 41 |
| 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 35 minutes (99232)162 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)88 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)49 services
- Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)20 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%
- Arthritis75%
- Depression47%
- Ischemic heart disease43%
- Anxiety42%
Hospitals where Marissa A. Stewart works
Medicare's Facility Affiliation Data lists Marissa A. Stewart 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 Daytona BeachDaytona Beach, FL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 100068
- 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 Palm CoastPalm Coast, FL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 100118
- AdventHealth Palm Coast ParkwayPalm Coast, FL · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 100363
Practice locations
Addresses where Marissa A. Stewart is enrolled with Medicare (CMS data updated October 2, 2026).
- 1055 Saxon BlvdOrange City, FL 32763 (386) 917‑5000
- 1200 Lexington Green LnSanford, FL 32771
- 301 Memorial Medical PkwyDaytona Beach, FL 32117 (386) 231‑6000
Group practices
Medicare enrollment lists Marissa A. Stewart as a member of these groups (CMS data updated October 2, 2026).
- Ability Health Services and Rehabilitation LP1,269 clinicians in the group
- Ability Health Services, Inc1,258 clinicians in the group
- Florida Hospital Healthcare Partners, Inc642 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Orange City
Clinicians with the same Medicare primary specialty in Orange City, FL — not a recommendation.
Other clinicians in Ability Health Services and Rehabilitation LP
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2021 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1033707542 |
| 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