Quick answers
- Does Vaughn D. Klaassen accept Medicare assignment?
- Yes. Medicare's clinician data says Vaughn D. Klaassen 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 Vaughn D. Klaassen see?
- In 2024, CMS data shows 25 Original Medicare patients and 100 services for Vaughn D. Klaassen. This counts Original Medicare only and measures volume, not quality.
- What is Vaughn D. Klaassen's NPI number?
- 1578639290. 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 Vaughn D. Klaassen, 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 | 25 |
|---|---|
| Services billed to Medicare | 100 |
| Different services or procedures | 4 |
| Participating Medicare provider | Yes |
| Average age of these patients | 65 |
Most frequent services
- Psychotherapy, 45 minutes (90834)73 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 pressure72%
- High cholesterol72%
- Anxiety68%
- Depression56%
- Arthritis52%
Hospitals where Vaughn D. Klaassen works
Medicare's Facility Affiliation Data lists Vaughn D. Klaassen 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.
- OSF Saint Elizabeth MDL CenterPeru, IL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 140110
Practice locations
Addresses where Vaughn D. Klaassen is enrolled with Medicare (CMS data updated October 2, 2026).
- 1100 E Norris DrOttawa, IL 61350 (815) 433‑3100
- 747 E Etna Rd, BOttawa, IL 61350 (815) 993‑1614
- 8600 State Route 91, Suite 130Peoria, IL 61615 (309) 683‑5050
Group practices
Medicare enrollment lists Vaughn D. Klaassen as a member of these groups (CMS data updated October 2, 2026).
- OSF Multi-Specialty Group2,114 clinicians in the group
- Ottawa Regional Hospital and Healthcare Center47 clinicians in the group
- Illinois Valley Counseling Services8 clinicians in the group
Specialties
- Mental Health Counselorprimary
Other mental health counselors in Ottawa
Clinicians with the same Medicare primary specialty in Ottawa, IL — not a recommendation.
Other clinicians in OSF Multi-Specialty Group
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Graduation year | 1994 |
|---|---|
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1578639290 |
| 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