Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Diane M Sixsmith, MD

Individual provider Emergency Medicine Physician · NPI 1043237779

Diane M Sixsmith, MD practises Emergency Medicine in Flushing, New York. Graduated from University of Pittsburgh School of Medicine in 1973, 53 years ago. Practices with Optum Urgent Care PLLC, a 69-clinician group. Licensed in New York.

Years since qualifying
53
Trained at
University of Pittsburgh School of Medicine
Licensed in
NY
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

56-45 Main St New York Hospital Medical Center Of Queens Emergency De
Flushing, NY 11355 Not confirmed with CMS for 16 years — call before visiting
Phone: (718) 670-1231
Fax: (516) 437-4167
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence 122203 (NY)

Record details

NPI number1043237779
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 17, 2006
Last updated in NPPESNovember 2, 2010

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyEMERGENCY MEDICINE
Medical schoolUNIVERSITY OF PITTSBURGH SCHOOL OF MEDICINE
Graduated 1973 (53 years in practice)
Group practice Optum Urgent Care Pllc — 69 clinicians
Accepts Medicare assignment Not indicated

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients196
Services billed 442 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Colleagues at Optum Urgent Care PLLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 69 clinicians in the practice; 12 are shown here.

Other providers in Flushing