Quick answers
- Does Raymond L. Hartke accept Medicare assignment?
- Yes. Medicare's clinician data says Raymond L. Hartke 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 Raymond L. Hartke see?
- In 2024, CMS data shows 443 Original Medicare patients and 5,778 services for Raymond L. Hartke. This counts Original Medicare only and measures volume, not quality.
- What is Raymond L. Hartke's NPI number?
- 1952475931. 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 Raymond L. Hartke, 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 | 443 |
|---|---|
| Services billed to Medicare | 5,778 |
| Different services or procedures | 69 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)130 services
- Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)114 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)71 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)58 services
- Colorectal cancer screening; colonoscopy on individual at high risk (G0105)53 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 cholesterol75%
- High blood pressure70%
- Arthritis40%
- Ischemic heart disease26%
- Diabetes25%
- Anxiety23%
Hospitals where Raymond L. Hartke works
Medicare's Facility Affiliation Data lists Raymond L. Hartke 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 Rhinelander HospitalRhinelander, WI · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 520019
- Aspirus Tomahawk HospitalTomahawk, WI · Critical Access Hospital · Emergency services: listed by Medicare · CCN 521313
- Aspirus Wausau HospitalWausau, WI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 520030
- Howard Young Medical CenterWoodruff, WI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 520091
- Langlade HospitalAntigo, WI · Critical Access Hospital · Emergency services: listed by Medicare · CCN 521350
Practice locations
Addresses where Raymond L. Hartke is enrolled with Medicare (CMS data updated October 2, 2026).
- 411 Westwood DrWausau, WI 54401 (715) 847‑2558
Group practices
Medicare enrollment lists Raymond L. Hartke as a member of this group (CMS data updated October 2, 2026).
- Gastrointestinal Associates S.C.42 clinicians in the group
Specialties
- Gastroenterologyprimary
Other gastroenterologists in Wausau
Clinicians with the same Medicare primary specialty in Wausau, WI — not a recommendation.
Other clinicians in Gastrointestinal Associates S.C.
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Ohio State University College Of Medicine |
| Graduation year | 1990 (36 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1952475931 |
| 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