Quick answers
- Does Annette L. Giangiacomo accept Medicare assignment?
- Yes. Medicare's clinician data says Annette L. Giangiacomo 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 Annette L. Giangiacomo see?
- In 2024, CMS data shows 158 Original Medicare patients and 406 services for Annette L. Giangiacomo. This counts Original Medicare only and measures volume, not quality.
- What is Annette L. Giangiacomo's NPI number?
- 1912929019. 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 Annette L. Giangiacomo, 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 | 158 |
|---|---|
| Services billed to Medicare | 406 |
| Different services or procedures | 18 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)103 services
- Imaging of optic nerve (92133)62 services
- Exam of visual field with extended testing (92083)58 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)41 services
- Exam of the internal drainage system of eye (92020)34 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 pressure73%
- High cholesterol70%
- Arthritis39%
- Diabetes25%
- Chronic kidney disease25%
- Ischemic heart disease18%
Practice locations
Addresses where Annette L. Giangiacomo is enrolled with Medicare (CMS data updated October 2, 2026).
- 1087 W Mason StGreen Bay, WI 54303 (920) 499‑3102
Group practices
Medicare enrollment lists Annette L. Giangiacomo as a member of this group (CMS data updated October 2, 2026).
- Tower Clock Eye Center SC8 clinicians in the group
Specialties
- Ophthalmologyprimary
Other ophthalmologists in Green Bay
Clinicians with the same Medicare primary specialty in Green Bay, WI — not a recommendation.
Other clinicians in Tower Clock Eye Center SC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2001 (25 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1912929019 |
| 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