Quick answers
- Does Marianna L. Sisk accept Medicare assignment?
- Yes. Medicare's clinician data says Marianna L. Sisk 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 Marianna L. Sisk see?
- In 2024, CMS data shows 139 Original Medicare patients and 633 services for Marianna L. Sisk. This counts Original Medicare only and measures volume, not quality.
- What is Marianna L. Sisk's NPI number?
- 1306107636. 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 Marianna L. Sisk, 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 | 139 |
|---|---|
| Services billed to Medicare | 633 |
| Different services or procedures | 31 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)160 services
- Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)69 services
- Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)62 services
- Face-to-face behavioral counseling for obesity, group (2-10), 30 minutes (G0473)37 services
- Face-to-face behavioral counseling for obesity, 15 minutes (G0447)30 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 cholesterol75%
- High blood pressure70%
- Arthritis43%
- Diabetes28%
- Ischemic heart disease22%
- Depression20%
Hospitals where Marianna L. Sisk works
Medicare's Facility Affiliation Data lists Marianna L. Sisk 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
Practice locations
Addresses where Marianna L. Sisk is enrolled with Medicare (CMS data updated October 2, 2026).
- 1200 Lexington Green LnSanford, FL 32771
- 21 Columbia StOrlando, FL 32806 (321) 841‑6600
- 21 Columbia St, Suite 201Orlando, FL 32806 (321) 841‑6600
- 7408 Red Bug Lake RdOviedo, FL 32765 (407) 381‑7387
- 7416 Red Bug Lake RdOviedo, FL 32765 (407) 381‑7345
Group practices
Medicare enrollment lists Marianna L. Sisk 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
- Orlando Physicians Network Inc232 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Sanford
Clinicians with the same Medicare primary specialty in Sanford, 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 | DO |
|---|---|
| Graduation year | 2012 (14 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1306107636 |
| 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