Sylvia Sontheimer
Emergency Medicine Physician · Fort Defiance, AZ
Sylvia Sontheimer is an emergency medicine physician with a practice address in Fort Defiance, Arizona, and NPI 1205412830, issued on Mar 23, 2021. Check the license on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Sylvia Sontheimer
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 1024315 MA
Self-reported in NPPES; status is on the state search - Practice location
- Corner OF Route N12 And N7, Fort Defiance, AZ 86504
- Phone
- (928) 729-8000
- Enumerated
- Mar 23, 2021
- Entity
- Type 1 · individual
Also registered at Corner OF Route N12 And N7
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Moaz Abulfaraj, MDSurgery Physician1861797193
- Walter Adam, MDFamily Medicine Physician1053368860
- Margaret Adams, ARNPFamily Nurse Practitioner1427455682
- Sandra Adkins, DDSDentist1710918131
- Elizabeth Agre, PT, DPTPhysical Therapist1891268280
- Mohammad Akhavan Heidari, MDSurgery Physician1205041571
Verify Sylvia Sontheimer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical BoardCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
86% fewer Medicare Part D claims than the average emergency medicine physician in 2024
48 Medicare Part D claims for 34 beneficiaries, against an average of 355 among the 49,029 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
18 emergency medicine physician records list a Fort Defiance practice address
They are 18 of the 590 NPPES records with a Fort Defiance practice address, and 1,419 emergency medicine physician records in Arizona.
All 18 in Fort Defiance → All 1,419 in Arizona → Every provider in Fort Defiance →
Other emergency medicine physician records in Arizona
- Dimyana Abdelmalek, MDChinle, AZ1194012146
- Linda Abernathy, MDTuba City, AZ1386687093
- Sameer Aboufadel, DO, MPHTucson, AZ1639063431
- Josephine Acuna, M.DTucson, AZ1710325287
- Norberto Adame, MDPhoenix, AZ1144276213
- Bruce Adams, M.D.Mesa, AZ1801824925
- Ryan Adkins, D.O.Chandler, AZ1417483538
- Geovar Agbayani, DOKingman, AZ1265016646
- Judith Aikawa, MDPhoenix, AZ1548296056
- Ronald Aikawa, MDPhoenix, AZ1225067564
Common questions
What is Sylvia Sontheimer's NPI number?
Sylvia Sontheimer's National Provider Identifier (NPI) is 1205412830, issued on Mar 23, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Sylvia Sontheimer located?
The NPPES record lists a practice address at Corner OF Route N12 And N7, Fort Defiance, AZ, 86504. Phone: (928) 729-8000. Providers update this record themselves, so call before visiting.
How can I verify Sylvia Sontheimer's license?
Search the Arizona Medical Board at https://www.azmd.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Sylvia Sontheimer prescribe under Medicare Part D?
In 2024, Sylvia Sontheimer had 48 Medicare Part D claims for 34 beneficiaries; the average among emergency medicine physician prescribers was 355. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.