Quick answers
- Does Jeremy D. Onnen accept Medicare assignment?
- Yes. Medicare's clinician data says Jeremy D. Onnen 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 Jeremy D. Onnen see?
- In 2024, CMS data shows 24 Original Medicare patients and 47 services for Jeremy D. Onnen. This counts Original Medicare only and measures volume, not quality.
- What is Jeremy D. Onnen's NPI number?
- 1255599841. 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 Jeremy D. Onnen, 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 | 24 |
|---|---|
| Services billed to Medicare | 47 |
| Different services or procedures | 27 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
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%
- Arthritis71%
- High cholesterol67%
- Anxiety46%
Hospitals where Jeremy D. Onnen works
Medicare's Facility Affiliation Data lists Jeremy D. Onnen 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.
- Mercy Hospital SpringfieldSpringfield, MO · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 260065
Practice locations
Addresses where Jeremy D. Onnen is enrolled with Medicare (CMS data updated October 2, 2026).
- 1235 E Cherokee StSpringfield, MO 65804
- 2115 S Fremont Ave, 3050 Mc Infectious Disease WhitesideSpringfield, MO 65804 (417) 820‑3905
- 3050 E River Bluff Blvd, Mc OrthopedicsOzark, MO 65721 (417) 820‑5610
Group practices
Medicare enrollment lists Jeremy D. Onnen as a member of this group (CMS data updated October 2, 2026).
- Mercy Clinic Springfield Communities1,120 clinicians in the group
Specialties
- Orthopedic Surgeryprimary
Other orthopedic surgeons in Springfield
Clinicians with the same Medicare primary specialty in Springfield, MO — not a recommendation.
Other clinicians in Mercy Clinic Springfield Communities
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Medical school | University Of Michigan Medical School |
|---|---|
| Graduation year | 2007 (19 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1255599841 |
| 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