Quick answers
- Does Jason G. Coisman accept Medicare assignment?
- Yes. Medicare's clinician data says Jason G. Coisman 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 Jason G. Coisman see?
- In 2024, CMS data shows 18 Original Medicare patients and 19 services for Jason G. Coisman. This counts Original Medicare only and measures volume, not quality.
- What is Jason G. Coisman's NPI number?
- 1538135926. 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 Jason G. Coisman, 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 | 18 |
|---|---|
| Services billed to Medicare | 19 |
| Different services or procedures | 6 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
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%
Hospitals where Jason G. Coisman works
Medicare's Facility Affiliation Data lists Jason G. Coisman 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.
- Bellin Health Oconto HospitalOconto, WI · Critical Access Hospital · Emergency services: listed by Medicare · CCN 521356
Practice locations
Addresses where Jason G. Coisman is enrolled with Medicare (CMS data updated October 2, 2026).
- 744 S Webster AveGreen Bay, WI 54301 (920) 433‑3500
- 820 Arbutus AveOconto, WI 54153 (920) 835‑1100
Group practices
Medicare enrollment lists Jason G. Coisman as a member of these groups (CMS data updated October 2, 2026).
- Oconto Hospital and Medical Center Inc222 clinicians in the group
- Green Bay Emergency Medicine Services SC16 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in Green Bay
Clinicians with the same Medicare primary specialty in Green Bay, WI — not a recommendation.
Other clinicians in Oconto Hospital and 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 | 2000 (26 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1538135926 |
| 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