Quick answers
- Where does Diane M. Sixsmith see patients?
- Medicare's clinician data lists 1 practice location in Little Neck, NY. Call before your visit to confirm the address.
- What is Diane M. Sixsmith's specialty?
- Medicare lists Emergency Medicine as the primary specialty.
- Does Diane M. Sixsmith accept Medicare assignment?
- Medicare's clinician data says Diane M. Sixsmith may accept Medicare assignment (as of 2026-10-02). Ask the office whether they accept it for your visit.
- What is the phone number for Diane M. Sixsmith?
- (917) 563-1660, as listed in official Medicare / NPI Registry data.
- What is Diane M. Sixsmith's NPI number?
- 1043237779. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Diane M. Sixsmith is enrolled with Medicare (CMS data updated 2026-10-02).
- 254 -21 Nassau BlvdLittle Neck, NY 11362 (917) 563‑1660
Group practices
Medicare enrollment lists Diane M. Sixsmith as a member of this group (CMS data updated 2026-10-02).
- Optum Urgent Care PLLC68 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in New York
Clinicians with the same Medicare primary specialty in New York — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Pittsburgh School Of Medicine |
| Graduation year | 1973 |
| Gender (as listed) | Female |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1043237779 |
| 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 2026-10-02, retrieved 2026-10-29
- 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