Quick answers
- Does Teresa N. Head accept Medicare assignment?
- Yes. Medicare's clinician data says Teresa N. Head 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 Teresa N. Head see?
- In 2024, CMS data shows 405 Original Medicare patients and 1,254 services for Teresa N. Head. This counts Original Medicare only and measures volume, not quality.
- What is Teresa N. Head's NPI number?
- 1851547632. 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 Teresa N. Head, 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 | 405 |
|---|---|
| Services billed to Medicare | 1,254 |
| Different services or procedures | 12 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)286 services
- Established patient complete exam of visual system (92014)275 services
- Exam of visual field with extended testing (92083)259 services
- Photography of the retina (92250)225 services
- Imaging of optic nerve (92133)116 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%
- Arthritis49%
- Diabetes29%
- Anxiety27%
- Ischemic heart disease20%
Practice locations
Addresses where Teresa N. Head is enrolled with Medicare (CMS data updated October 2, 2026).
- 1277 Hartford AveJohnston, RI 02919
- 1277 Hartford Ave, Ocean State OphthalmologyJohnston, RI 02919 (401) 521‑3606
Group practices
Medicare enrollment lists Teresa N. Head as a member of this group (CMS data updated October 2, 2026).
- Giulio G Diamante MD Inc4 clinicians in the group
Specialties
- Optometryprimary
Other optometrists in Johnston
Clinicians with the same Medicare primary specialty in Johnston, RI — not a recommendation.
Other clinicians in Giulio G Diamante MD Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | OD |
|---|---|
| Optometry school | Pennsylvania College Of Optometry |
| Graduation year | 2008 (18 years since optometry school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1851547632 |
| 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