Quick answers
- Does Douglas W. Mielke accept Medicare assignment?
- Yes. Medicare's clinician data says Douglas W. Mielke 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 Douglas W. Mielke see?
- In 2024, CMS data shows 787 Original Medicare patients and 2,426 services for Douglas W. Mielke. This counts Original Medicare only and measures volume, not quality.
- What is Douglas W. Mielke's NPI number?
- 1104878149. 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 Douglas W. Mielke, 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 | 787 |
|---|---|
| Services billed to Medicare | 2,426 |
| Different services or procedures | 49 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Injection, propofol, 10 mg (J2704)578 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)540 services
- Ultrasound of heart with color-depicted blood flow, rate, direction and valve function (93306)269 services
- Blood test, basic group of blood chemicals (calcium, total) (80048)126 services
- Insertion of needle into vein for collection of blood sample (36415)107 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 cholesterol75%
- Ischemic heart disease55%
- Atrial fibrillation50%
- Arthritis45%
- Diabetes35%
Practice locations
Addresses where Douglas W. Mielke is enrolled with Medicare (CMS data updated October 2, 2026).
- 1420 Algoma StNew London, WI 54961 (920) 982‑8300
- 5045 W Grande Market DrAppleton, WI 54913 (920) 886‑9380
Group practices
Medicare enrollment lists Douglas W. Mielke as a member of this group (CMS data updated October 2, 2026).
- Ascension Medical Group-Fox Valley Wisconsin, Inc259 clinicians in the group
Specialties
Other interventional cardiologists in Wisconsin
Clinicians with the same Medicare primary specialty in Wisconsin — not a recommendation.
Other clinicians in Ascension Medical Group-Fox Valley Wisconsin, Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Wisconsin School Of Medicine |
| Graduation year | 1987 (39 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1104878149 |
| 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
- 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