Quick answers
- Does Jillian L. Margulies accept Medicare assignment?
- Yes. Medicare's clinician data says Jillian L. Margulies 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.
- What is Jillian L. Margulies's NPI number?
- 1649041146. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Jillian L. Margulies works
Medicare's Facility Affiliation Data lists Jillian L. Margulies 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.
- Chsli St Joseph HospitalBethpage, NY · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 330332
- St Catherine of Siena HospitalSmithtown, NY · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 330401
Practice locations
Addresses where Jillian L. Margulies is enrolled with Medicare (CMS data updated October 2, 2026).
- 200 Belle Terre RdPort Jefferson, NY 11777 (904) 372‑3948
- 50 New York Ave, 25aSmithtown, NY 11787 (904) 372‑3943
Group practices
Medicare enrollment lists Jillian L. Margulies as a member of this group (CMS data updated October 2, 2026).
- Diabetes Management Partners LLC73 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Port Jefferson
Clinicians with the same Medicare primary specialty in Port Jefferson, NY — not a recommendation.
Other clinicians in Diabetes Management Partners LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2023 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1649041146 |
| 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
- 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