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Emergency Medicine

Stefanie Williams, MD

Works at hospitals in Longmont, CO · Bonham, TX · Colorado, Texas

Summary

Stefanie Williams, MD (Emergency Medicine) is listed by Medicare at 2 hospitals in Longmont, CO and Bonham, TX. NPI 1891236014. Medicare data says the clinician accepts Medicare assignment. Source: CMS Facility Affiliation Data, updated 2026-10-02.

From official Medicare data

This page shows what Medicare's official clinician data says about Stefanie Williams, joined by NPI number (data updated 2026-10-02). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

At a glance

Emergency MedicinePrimary specialty
YesAccepts Medicare assignment
9Years since medical school (graduated 2017)
Drexel University College Of MedicineMedical school
FemaleGender (as listed)
Usacs Community Emergency Services of Colorado Inc.Group practice (+1 more)

Quick answers

Which hospitals does Stefanie Williams work at?
Medicare's official clinician data lists Stefanie Williams at 2 hospitals: Longmont United Hospital and TMC- Bonham Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
Where does Stefanie Williams see patients?
Medicare's clinician data lists 4 practice locations, including Arvada, CO, Dacono, CO and Bonham, TX. Call before your visit to confirm the address.
What is Stefanie Williams's specialty?
Medicare lists Emergency Medicine as the primary specialty.
Does Stefanie Williams accept Medicare assignment?
Yes. Medicare's clinician data says Stefanie Williams accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
What is the phone number for Stefanie Williams?
(303) 925-4560, as listed in official Medicare / NPI Registry data.
What is Stefanie Williams's NPI number?
1891236014. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Hospitals where Stefanie Williams works

Medicare's Facility Affiliation Data lists Stefanie Williams at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.

Practice locations

Addresses where Stefanie Williams is enrolled with Medicare (CMS data updated 2026-10-02).

Group practices

Medicare enrollment lists Stefanie Williams as a member of these groups (CMS data updated 2026-10-02).

  • Usacs Community Emergency Services of Colorado Inc.175 clinicians in the group
  • Hospitalist Medicine Physicians of Texas - Cypress PLLC27 clinicians in the group

Specialties

Find other Emergency Medicine doctors in Colorado →

Other emergency medicine doctors in Arvada

Clinicians with the same Medicare primary specialty in Arvada, CO — not a recommendation.

All emergency medicine doctors in Arvada →

Clinician information

CredentialMD
Medical schoolDrexel University College Of Medicine
Graduation year2017
Gender (as listed)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1891236014
CorrectionsReport 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

  1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
  2. National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
  3. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  4. Medicare Care Compare — official Medicare tool to look up clinicians