Quick answers
- Does Cassandra S. Oliveira accept Medicare assignment?
- Yes. Medicare's clinician data says Cassandra S. Oliveira 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 Cassandra S. Oliveira see?
- In 2024, CMS data shows 142 Original Medicare patients and 1,862 services for Cassandra S. Oliveira. This counts Original Medicare only and measures volume, not quality.
- What is Cassandra S. Oliveira's NPI number?
- 1538685938. 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 Cassandra S. Oliveira, 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 | 142 |
|---|---|
| Services billed to Medicare | 1,862 |
| Different services or procedures | 16 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)93 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)66 services
- Photography of the retina (92250)35 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)18 services
- Exam of visual field with extended testing (92083)17 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 cholesterol75%
- High blood pressure73%
- Arthritis43%
- Diabetes26%
- Ischemic heart disease26%
- Anxiety26%
Practice locations
Addresses where Cassandra S. Oliveira is enrolled with Medicare (CMS data updated October 2, 2026).
- 328 Cowesett Ave, Suite 2West Warwick, RI 02893 (401) 821‑4300
- 354 BroadwayProvidence, RI 02909 (508) 837‑3708
Group practices
Medicare enrollment lists Cassandra S. Oliveira as a member of this group (CMS data updated October 2, 2026).
- I for An Eye, LLC3 clinicians in the group
Specialties
- Optometryprimary
Other optometrists in West Warwick
Clinicians with the same Medicare primary specialty in West Warwick, RI — not a recommendation.
Other clinicians in I for An Eye, LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Graduation year | 2016 |
|---|---|
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1538685938 |
| 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