Quick answers
- Does Ian J. Stock accept Medicare assignment?
- Yes. Medicare's clinician data says Ian J. Stock 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 Ian J. Stock see?
- In 2024, CMS data shows 500 Original Medicare patients and 4,789 services for Ian J. Stock. This counts Original Medicare only and measures volume, not quality.
- What is Ian J. Stock's NPI number?
- 1326544537. 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 Ian J. Stock, 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 | 500 |
|---|---|
| Services billed to Medicare | 4,789 |
| Different services or procedures | 157 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml (Q9967)1,211 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)279 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)178 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)170 services
- Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes (99309)99 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 pressure67%
- High cholesterol58%
- Arthritis36%
- Chronic kidney disease32%
- Diabetes24%
- Depression22%
Hospitals where Ian J. Stock works
Medicare's Facility Affiliation Data lists Ian J. Stock 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.
- Gundersen Lutheran Medical CenterLa Crosse, WI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 520087
- Gundersen Palmer Lutheran Hospital and ClinicsWest Union, IA · Critical Access Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 161316
- Regional Health Services of Howard CountyCresco, IA · Critical Access Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 161328
- Veterans Memorial HospitalWaukon, IA · Critical Access Hospital · Emergency services: listed by Medicare · CCN 161318
- WinnmedDecorah, IA · Critical Access Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 161371
Practice locations
Addresses where Ian J. Stock is enrolled with Medicare (CMS data updated October 2, 2026).
- 1122 W Hwy 61Winona, MN 55987 (507) 615‑0600
- 1830 State Hwy 9Decorah, IA 52101 (563) 382‑3140
- 1830 State Hwy 9, Suite 100Decorah, IA 52101 (563) 382‑3140
- 1836 S AveLa Crosse, WI 54601 (608) 783‑7300
- 3111 Gundersen DrOnalaska, WI 54650 (608) 782‑7300
Group practices
Medicare enrollment lists Ian J. Stock as a member of these groups (CMS data updated October 2, 2026).
- Gundersen Lutheran Medical Center Inc895 clinicians in the group
- Gundersen Clinic Ltd418 clinicians in the group
- Gundersen Regional Clinics, LLC53 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Winona
Clinicians with the same Medicare primary specialty in Winona, MN — not a recommendation.
Other clinicians in Gundersen Lutheran Medical Center Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Midwestern University, Chicago College Of Osteopathic Med |
| Graduation year | 2018 (8 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1326544537 |
| 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