Quick answers
- Does Stephanie A. Guariglia accept Medicare assignment?
- Yes. Medicare's clinician data says Stephanie A. Guariglia 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 Stephanie A. Guariglia see?
- In 2024, CMS data shows 71 Original Medicare patients and 26,630 services for Stephanie A. Guariglia. This counts Original Medicare only and measures volume, not quality.
- What is Stephanie A. Guariglia's NPI number?
- 1457907222. 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 Stephanie A. Guariglia, 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 | 71 |
|---|---|
| Services billed to Medicare | 26,630 |
| Different services or procedures | 36 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Injection, natalizumab, 1 mg (J2323)11,700 services
- Infusion into a vein for therapy, prevention, or diagnosis, 1 hour or less (96365)64 services
- Injection of drug or substance under skin or into muscle (96372)15 services
- Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)13 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%
- Ischemic heart disease54%
- Diabetes49%
- Arthritis48%
- Chronic kidney disease38%
Hospitals where Stephanie A. Guariglia works
Medicare's Facility Affiliation Data lists Stephanie A. Guariglia at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Good Samaritan Hospital Medical CenterWest Islip, NY · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 330286
Practice locations
Addresses where Stephanie A. Guariglia is enrolled with Medicare (CMS data updated October 2, 2026).
- 260 E Middle Country Rd, Suite 214Smithtown, NY 11787 (631) 265‑5050
- 375 E Main St, Suite 26Bay Shore, NY 11706 (631) 665‑2255
Group practices
Medicare enrollment lists Stephanie A. Guariglia as a member of this group (CMS data updated October 2, 2026).
- CHS Physician Partners PC743 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Smithtown
Clinicians with the same Medicare primary specialty in Smithtown, NY — not a recommendation.
Other clinicians in CHS Physician Partners PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| School | State University Of New York At Stony Brook, School Of Medicine |
|---|---|
| Graduation year | 2019 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1457907222 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- 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