Quick answers
- Does Alyssa D. Mrsny accept Medicare assignment?
- Yes. Medicare's clinician data says Alyssa D. Mrsny 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 Alyssa D. Mrsny see?
- In 2024, CMS data shows 482 Original Medicare patients and 4,830 services for Alyssa D. Mrsny. This counts Original Medicare only and measures volume, not quality.
- What is Alyssa D. Mrsny's NPI number?
- 1366826109. 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 Alyssa D. Mrsny, 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 | 482 |
|---|---|
| Services billed to Medicare | 4,830 |
| Different services or procedures | 42 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Destruction of precancer skin growth, 2-14 growths (17003)2,653 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)543 services
- Destruction of precancer skin growth, 1 growth (17000)477 services
- Injection, triamcinolone acetonide, not otherwise specified, 10 mg (J3301)133 services
- Biopsy of related skin growth, first growth (11102)118 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 pressure72%
- Arthritis43%
- Diabetes24%
- Anxiety20%
- Depression19%
Hospitals where Alyssa D. Mrsny works
Medicare's Facility Affiliation Data lists Alyssa D. Mrsny 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.
- St Lukes Regional Medical CenterSioux City, IA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 160146
Practice locations
Addresses where Alyssa D. Mrsny is enrolled with Medicare (CMS data updated October 2, 2026).
- 2720 Stone Park BlvdSioux City, IA 51104 (712) 279‑3500
- 2735 Outer Dr N, Cnos NorthsideSioux City, IA 51104 (712) 224‑5692
- 4301 Sergeant Rd, Suite 120Sioux City, IA 51106 (605) 217‑2667
- 575 N Sioux Point RdDakota Dunes, SD 57049 (605) 217‑2667
- 705 N Sioux Point Rd, Suite 100Dakota Dunes, SD 57049 (605) 217‑2667
Group practices
Medicare enrollment lists Alyssa D. Mrsny as a member of this group (CMS data updated October 2, 2026).
- Cnos PC99 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Sioux City
Clinicians with the same Medicare primary specialty in Sioux City, IA — not a recommendation.
Other clinicians in Cnos PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2015 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1366826109 |
| 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