Quick answers
- Does Douglass Fruin accept Medicare assignment?
- Yes. Medicare's clinician data says Douglass Fruin 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 Douglass Fruin see?
- In 2024, CMS data shows 2,198 Original Medicare patients and 2,396 services for Douglass Fruin. This counts Original Medicare only and measures volume, not quality.
- What is Douglass Fruin's NPI number?
- 1427578681. 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 Douglass Fruin, 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 | 2,198 |
|---|---|
| Services billed to Medicare | 2,396 |
| Different services or procedures | 9 |
| Participating Medicare provider | Yes |
| Average age of these patients | 77 |
Most frequent services
- Established patient complete exam of visual system (92014)1,215 services
- New patient complete exam of visual system (92004)468 services
- Established patient problem focused exam of visual system (92012)352 services
- Measurement of retinal and optic nerve function (92273)209 services
- Photography of the retina (92250)91 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%
- Depression64%
- Alzheimer's disease or dementia60%
- Anxiety54%
- Arthritis53%
Practice locations
Addresses where Douglass Fruin is enrolled with Medicare (CMS data updated October 2, 2026).
- 11414 W Park Pl, Suite 202Milwaukee, WI 53224 (773) 588‑3090
- 3500 W Peterson Ave, Suite 401Chicago, IL 60659 (773) 588‑3090
Group practices
Medicare enrollment lists Douglass Fruin as a member of these groups (CMS data updated October 2, 2026).
- Charles S Ovitsky PC15 clinicians in the group
- Ovitsky Vision Care of Wisconsin Ltd6 clinicians in the group
Specialties
- Optometryprimary
Other optometrists in Milwaukee
Clinicians with the same Medicare primary specialty in Milwaukee, WI — not a recommendation.
Other clinicians in Charles S Ovitsky PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | OD |
|---|---|
| Optometry school | Southern College Of Optometry |
| Graduation year | 2017 (9 years since optometry school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1427578681 |
| 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