Quick answers
- Does Colin J. Sigmund accept Medicare assignment?
- Yes. Medicare's clinician data says Colin J. Sigmund 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 Colin J. Sigmund see?
- In 2024, CMS data shows 129 Original Medicare patients and 245 services for Colin J. Sigmund. This counts Original Medicare only and measures volume, not quality.
- What is Colin J. Sigmund's NPI number?
- 1811568850. 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 Colin J. Sigmund, 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 | 129 |
|---|---|
| Services billed to Medicare | 245 |
| Different services or procedures | 13 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)65 services
- Established patient complete exam of visual system (92014)51 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)21 services
- New patient complete exam of visual system (92004)20 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)18 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 pressure74%
- High cholesterol66%
- Arthritis30%
- Depression26%
- Anxiety26%
- Diabetes22%
Practice locations
Addresses where Colin J. Sigmund is enrolled with Medicare (CMS data updated October 2, 2026).
- 1543 Park Pl, Suite 400Green Bay, WI 54304 (920) 497‑0100
- 2500 E Capitol Dr, Suite 3500Appleton, WI 54911 (920) 358‑1820
Group practices
Medicare enrollment lists Colin J. Sigmund as a member of this group (CMS data updated October 2, 2026).
- Valley Eye Associates26 clinicians in the group
Specialties
- Optometryprimary
Other optometrists in Green Bay
Clinicians with the same Medicare primary specialty in Green Bay, WI — not a recommendation.
Other clinicians in Valley Eye Associates
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | OD |
|---|---|
| Optometry school | Indiana University - School Of Optometry |
| Graduation year | 2021 (5 years since optometry school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1811568850 |
| 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