Quick answers
- Does Marissa J. Hernandez accept Medicare assignment?
- Yes. Medicare's clinician data says Marissa J. Hernandez 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 J. Hernandez see?
- In 2024, CMS data shows 56 Original Medicare patients and 56 services for Marissa J. Hernandez. This counts Original Medicare only and measures volume, not quality.
- What is Marissa J. Hernandez's NPI number?
- 1104164417. 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 J. Hernandez, 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 | 56 |
|---|---|
| Services billed to Medicare | 56 |
| Different services or procedures | 9 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Anesthesia for lens surgery (00142)23 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 pressure68%
- Arthritis34%
- Diabetes30%
- Ischemic heart disease23%
- Chronic kidney disease20%
Practice locations
Addresses where Marissa J. Hernandez is enrolled with Medicare (CMS data updated October 2, 2026).
- 140 24th St SWisconsin Rapids, WI 54494 (715) 424‑1881
- 411 Westwood DrWausau, WI 54401 (715) 847‑2558
- 800 N 1st StWausau, WI 54403 (715) 261‑8500
Group practices
Medicare enrollment lists Marissa J. Hernandez as a member of these groups (CMS data updated October 2, 2026).
- Gastrointestinal Associates S.C.42 clinicians in the group
- Midwest Alliance Services LLC13 clinicians in the group
Specialties
Find other clinicians: Certified Registered Nurse Anesthetist (CRNA), Wisconsin →
Other nurse anesthetists in Wisconsin Rapids
Clinicians with the same Medicare primary specialty in Wisconsin Rapids, WI — not a recommendation.
Other clinicians in Gastrointestinal Associates S.C.
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | CNA |
|---|---|
| Graduation year | 2012 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1104164417 |
| 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
- 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