Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Sylvia Yvonne Sontheimer

Individual provider Emergency Medicine Physician · NPI 1205412830

Sylvia Yvonne Sontheimer is an Emergency Medicine in Fort Defiance, Arizona. Graduated from University of Alabama School of Medicine in 2021, 5 years ago. Licensed in Massachusetts.

Years since qualifying
5
Trained at
University of Alabama School of Medicine
Licensed in
MA
In the registry since
2021

Practice location Address checks out

Corner Of Route N12 And N7
Fort Defiance, AZ 86504
Phone: (928) 729-8000
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence 1024315 (MA)

Record details

NPI number1205412830
Entity typeIndividual (Type 1)
GenderFemale
Sole proprietorNo
NPI enumeratedMarch 23, 2021
Last updated in NPPESJuly 29, 2026
Certification dateJuly 29, 2026

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Medical schoolUNIVERSITY OF ALABAMA SCHOOL OF MEDICINE
Graduated 2021 (5 years in practice)
Accepts Medicare assignment Not indicated
Practice locations2 on file with Medicare

Other providers in Fort Defiance