Quick answers
- Does Joanna L. Mercier accept Medicare assignment?
- Yes. Medicare's clinician data says Joanna L. Mercier 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 Joanna L. Mercier see?
- In 2024, CMS data shows 206 Original Medicare patients and 680 services for Joanna L. Mercier. This counts Original Medicare only and measures volume, not quality.
- What is Joanna L. Mercier's NPI number?
- 1356844229. 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 Joanna L. Mercier, 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 | 206 |
|---|---|
| Services billed to Medicare | 680 |
| Different services or procedures | 12 |
| Participating Medicare provider | Yes |
| Average age of these patients | 81 |
Most frequent services
- Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes (99310)308 services
- Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes (99309)238 services
- Nursing facility discharge management, more than 30 minutes (99316)94 services
- Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)15 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%
- Arthritis68%
- Chronic kidney disease61%
- Ischemic heart disease52%
- Anxiety52%
Hospitals where Joanna L. Mercier works
Medicare's Facility Affiliation Data lists Joanna L. Mercier 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
Practice locations
Addresses where Joanna L. Mercier is enrolled with Medicare (CMS data updated October 2, 2026).
- 701 W Plymouth AveDeland, FL 32720 (386) 943‑4522
Group practices
Medicare enrollment lists Joanna L. Mercier as a member of this group (CMS data updated October 2, 2026).
- Florida Hospital Healthcare Partners, Inc642 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Deland
Clinicians with the same Medicare primary specialty in Deland, FL — not a recommendation.
Other clinicians in Florida Hospital Healthcare Partners, Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Graduation year | 2010 |
|---|---|
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1356844229 |
| 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