Quick answers
- Does Jason Lewis accept Medicare assignment?
- Yes. Medicare's clinician data says Jason Lewis 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 Lewis see?
- In 2024, CMS data shows 222 Original Medicare patients and 251 services for Jason Lewis. This counts Original Medicare only and measures volume, not quality.
- What is Jason Lewis's NPI number?
- 1841850542. 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 Lewis, 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 | 222 |
|---|---|
| Services billed to Medicare | 251 |
| Different services or procedures | 14 |
| Participating Medicare provider | Yes |
| Average age of these patients | 71 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)51 services
- Emergency department visit with moderate level of medical decision making (99284)49 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)43 services
- Emergency department visit with high level of medical decision making (99285)40 services
- Emergency department visit with low level of medical decision making (99283)38 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%
- High cholesterol69%
- Arthritis40%
- Anxiety35%
- Diabetes31%
- Depression31%
Hospitals where Jason Lewis works
Medicare's Facility Affiliation Data lists Jason Lewis 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.
- Aspirus Medford Hospital & Clinics, IncMedford, WI · Critical Access Hospital · Emergency services: listed by Medicare · CCN 521324
- Langlade HospitalAntigo, WI · Critical Access Hospital · Emergency services: listed by Medicare · CCN 521350
- Marshfield Medical CenterMarshfield, WI · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 520037
Practice locations
Addresses where Jason Lewis is enrolled with Medicare (CMS data updated October 2, 2026).
- 1000 N Oak AveMarshfield, WI 54449 (715) 387‑5511
- 1721 S Stephenson AveIron Mountain, MI 49801 (906) 774‑1313
- 2817 New Pinery RdPortage, WI 53901 (608) 742‑4131
- 9576 Hwy 70Minocqua, WI 54548 (715) 358‑1710
Group practices
Medicare enrollment lists Jason Lewis as a member of these groups (CMS data updated October 2, 2026).
- MCHS Hospitals Inc1,197 clinicians in the group
- Divine Savior Healthcare Inc141 clinicians in the group
- Dickinson County Healthcare System101 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Marshfield
Clinicians with the same Medicare primary specialty in Marshfield, WI — not a recommendation.
Other clinicians in MCHS Hospitals Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2019 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1841850542 |
| 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