Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

SYLVIA YVONNE SONTHEIMER
NPI 1205412830
Emergency Medicine in Fort Defiance, AZ

Q: What is Sylvia Sontheimer's NPI number?

The NPI number for Sylvia Sontheimer is 1205412830. It was assigned to this individual provider in the NPPES registry on March 23, 2021.

Q: What is Sylvia Sontheimer's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Q: When was this NPI record last updated?

The NPPES record for Sylvia Sontheimer was last updated on July 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since March 23, 2021PECOS Enrolled

CORNER OF ROUTE N12 AND N7, FORT DEFIANCE, AZ 86504(928) 729-8000 Get Directions Write a Review

NPPES record last updated: July 29, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Jul 29, 2026, Jul 3, 2025, Jul 10, 2021 and 1 more (4 updates tracked since 2021).

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About Sylvia Yvonne Sontheimer NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

SYLVIA YVONNE SONTHEIMER (NPI 1205412830) is an individual emergency medicine provider in Fort Defiance, Arizona, licensed in Massachusetts (1024315) and active in the NPI registry since March 2021. She is enrolled in Medicare PECOS and is a graduate of University Of Alabama School Of Medicine (2021).

NPPES Registry Identity

NPI1205412830

Entity TypeIndividualFemale

Primary Taxonomy207P00000X

Provider Legal NameSYLVIA YVONNE SONTHEIMER

Location AddressCORNER OF ROUTE N12 AND N7Fort Defiance, AZ 86504

Mailing AddressPo Box 649Fort Defiance, AZ 86504-0649

Phone(928) 729-8000

Sole ProprietorNo

Medical School CMSUniversity Of Alabama School Of MedicineGraduated 2021

Enumeration DateMarch 23, 2021

Last NPPES UpdateJuly 29, 20264 updates tracked since enumeration

NPPES CertifiedJuly 29, 2026

✔ NPI 1205412830 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207P00000X

License✔ Licensed in MA · 1024315

Definition

An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.

CORNER OF ROUTE N12 AND N7, Fort Defiance, AZ 86504

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross Blue Shield of Arizona.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Sylvia Yvonne Sontheimer is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID8325437791

PECOS Enrollment IDI20250815002947

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 86504 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$85.89 typical visit price

range $55.44 – $168.60

Typical copayment $21.47 (range $13.86 – $42.15)

Most-billed visit code 99203

Established Patient

$98.00 typical visit price

range $17.72 – $137.41

Typical copayment $24.50 (range $4.43 – $34.35)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. ROMULO LAURETA PARUNGAO M.D.

Emergency Medicine