Quick answers
- Does Ann K. Buikema-Wiarda accept Medicare assignment?
- Yes. Medicare's clinician data says Ann K. Buikema-Wiarda 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 Ann K. Buikema-Wiarda see?
- In 2024, CMS data shows 886 Original Medicare patients and 7,093 services for Ann K. Buikema-Wiarda. This counts Original Medicare only and measures volume, not quality.
- What is Ann K. Buikema-Wiarda's NPI number?
- 1538146246. 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 Ann K. Buikema-Wiarda, 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 | 886 |
|---|---|
| Services billed to Medicare | 7,093 |
| Different services or procedures | 48 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Injection, faricimab-svoa, 0.1 mg (J2777)1,500 services
- Injection, aflibercept hd, 1 mg (J0177)1,000 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)499 services
- Measurement of corneal curvature and depth of eye (92136)464 services
- Removal of cataract with insertion of prosthetic lens (66984)418 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 cholesterol74%
- Arthritis41%
- Diabetes28%
- Ischemic heart disease24%
- Chronic kidney disease20%
Practice locations
Addresses where Ann K. Buikema-Wiarda is enrolled with Medicare (CMS data updated October 2, 2026).
- 2251 Dubois DrWarsaw, IN 46580 (574) 269‑2777
- 4330 Edison Lakes Pkwy, Suite AMishawaka, IN 46545 (574) 271‑0120
Group practices
Medicare enrollment lists Ann K. Buikema-Wiarda as a member of this group (CMS data updated October 2, 2026).
- Grossnickle Eye Center Inc12 clinicians in the group
Specialties
- Ophthalmologyprimary
Other ophthalmologists in Warsaw
Clinicians with the same Medicare primary specialty in Warsaw, IN — not a recommendation.
Other clinicians in Grossnickle Eye Center Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Northwestern University Feinberg Medical School |
| Graduation year | 1995 (31 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1538146246 |
| 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