Quick answers
- Does Katie A. Shannon accept Medicare assignment?
- Yes. Medicare's clinician data says Katie A. Shannon 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 Katie A. Shannon see?
- In 2024, CMS data shows 239 Original Medicare patients and 1,224 services for Katie A. Shannon. This counts Original Medicare only and measures volume, not quality.
- What is Katie A. Shannon's NPI number?
- 1144829300. 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 Katie A. Shannon, 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 | 239 |
|---|---|
| Services billed to Medicare | 1,224 |
| Different services or procedures | 7 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)755 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)409 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)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 blood pressure75%
- Arthritis75%
- High cholesterol72%
- Osteoporosis36%
- Diabetes28%
- Ischemic heart disease26%
Hospitals where Katie A. Shannon works
Medicare's Facility Affiliation Data lists Katie A. Shannon 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.
- Floyd County Medical CenterCharles City, IA · Critical Access Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 161347
- Hancock County Health SystemBritt, IA · Critical Access Hospital · Emergency services: listed by Medicare · CCN 161307
- Kossuth Regional Health CenterAlgona, IA · Critical Access Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 161353
- MercyOne North Iowa Medical CenterMason City, IA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 160064
- Mitchell County Regional HealthOsage, IA · Critical Access Hospital · Medicare rating: 3 of 5 stars · Emergency services: not listed by Medicare · CCN 161323
Practice locations
Addresses where Katie A. Shannon is enrolled with Medicare (CMS data updated October 2, 2026).
- 1000 4th St SW, Mercyone North Iowa Specialty CareMason City, IA 50401 (641) 428‑6999
Group practices
Medicare enrollment lists Katie A. Shannon as a member of this group (CMS data updated October 2, 2026).
- North Iowa Mercy Clinics302 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Mason City
Clinicians with the same Medicare primary specialty in Mason City, IA — not a recommendation.
Other clinicians in North Iowa Mercy Clinics
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Graduation year | 2020 |
|---|---|
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1144829300 |
| 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