Quick answers
- Does Marissa S. Nguyen accept Medicare assignment?
- Yes. Medicare's clinician data says Marissa S. Nguyen 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 S. Nguyen see?
- In 2024, CMS data shows 95 Original Medicare patients and 297 services for Marissa S. Nguyen. This counts Original Medicare only and measures volume, not quality.
- What is Marissa S. Nguyen's NPI number?
- 1508543026. 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 S. Nguyen, 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 | 95 |
|---|---|
| Services billed to Medicare | 297 |
| Different services or procedures | 5 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Treatment of speech, language, voice, communication, and/or hearing processing disorder (92507)172 services
- Treatment of swallowing and feeding disorder (92526)88 services
- Evaluation of swallowing function (92610)17 services
- Evaluation and recording of swallowing using an endoscope (92612)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 cholesterol75%
- High blood pressure71%
- Arthritis60%
- Ischemic heart disease34%
- Anxiety33%
- COPD27%
Practice locations
Addresses where Marissa S. Nguyen is enrolled with Medicare (CMS data updated October 2, 2026).
- 1222 S Patterson Blvd, Suite 400Dayton, OH 45402
Group practices
Medicare enrollment lists Marissa S. Nguyen as a member of this group (CMS data updated October 2, 2026).
- Southwest Ohio Ent Specialists Inc43 clinicians in the group
Specialties
Find other clinicians: Qualified Speech Language Pathologist, Ohio →
Other speech-language pathologists in Dayton
Clinicians with the same Medicare primary specialty in Dayton, OH — not a recommendation.
Other clinicians in Southwest Ohio Ent Specialists Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Graduation year | 2022 |
|---|---|
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1508543026 |
| 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