DEAN J WILLIAMS M.D.
NPI 1104841501
Emergency Medicine in Erie, CO
About Dean J Williams M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DEAN J WILLIAMS M.D. (NPI 1104841501) is an individual emergency medicine provider in Erie, Colorado, licensed in Colorado (48666) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS, is affiliated with Trinity Regional Medical Center, and is a graduate of University Of Calgary, Faculty Of Medicine (1994).
NPPES Registry Identity
Specialties & Licenses
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dean J Williams M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
18Medicare enrollment records show Dean Williams reassigns Medicare billing to 18 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Dacono, CO 80514
- Reassigned Medicare billing, Colorado enrollment
- 352 clinicians in this Medicare group
Brighton, CO 80601
- Reassigned Medicare billing, Colorado enrollment
- 31 clinicians in this Medicare group
North Platte, NE 69101
- Reassigned Medicare billing, Nebraska enrollment
- 365 clinicians in this Medicare group
Lechee, AZ 86040
- Reassigned Medicare billing, Texas enrollment
- Medicare enrollment name: Tuba City Regional Health Care Corporation
- 540 clinicians in this Medicare group
Beach, ND 58621
- Reassigned Medicare billing, North Dakota enrollment
- 401 clinicians in this Medicare group
Sioux City, IA 51101
- Reassigned Medicare billing, Iowa enrollment
- 42 clinicians in this Medicare group
Sioux City, IA 51104
- Reassigned Medicare billing, Iowa enrollment
- 281 clinicians in this Medicare group
Watford City, ND 58854
- Reassigned Medicare billing, North Dakota enrollment
- 108 clinicians in this Medicare group
Fort Dodge, IA 50501
- Reassigned Medicare billing, Iowa enrollment
- 387 clinicians in this Medicare group
West Des Moines, IA 50266
- Reassigned Medicare billing, Iowa enrollment
- 545 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 3
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Trinity Regional Medical Center
Acute Care Hospitals · Fort Dodge, IASt Lukes Regional Medical Center
Acute Care Hospitals · Sioux City, IAGreat Plains Health
Acute Care Hospitals · North Platte, NEGeisinger-Lewistown Hospital
Acute Care Hospitals · Lewistown, PAGeisinger Wyoming Valley Medical Center
Acute Care Hospitals · Wilkes Barre, PAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 80516 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Dean Williams's NPI number?
The NPI number for Dean Williams is 1104841501. It was assigned to this individual provider in the NPPES registry on July 13, 2006.
Where is Dean Williams located?
Dean Williams practices at PO Box 252, Erie, CO 80516. The listed phone number is (720) 505-1753.
What is Dean Williams's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Dean Williams enrolled in Medicare?
Yes. Dean Williams is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Dean Williams's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Dean Williams reassigns Medicare benefits to 18 organizations: Usacs Community Emergency Services Of Colorado, Inc. (Dacono, CO), Brighton Community Emergency Physicians Lpa (Brighton, CO), North Platte Nebraska Hospital Corporation (North Platte, NE), Lechee Health Facility (Lechee, AZ), St. Joseph's Hospital And Health Center (Beach, ND) and 13 more organizations, listed in the Medicare section above. Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Dean Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Dean Williams accept?
Health plans from Blue Cross Blue Shield of North Dakota, Oscar Health, Oscar Insurance Company, Select Health and Wellmark Health Plan of Iowa, Inc. list Dean Williams as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Dean Williams affiliated with any hospitals?
According to CMS data, Dean Williams is affiliated with Trinity Regional Medical Center, St Lukes Regional Medical Center, Great Plains Health, Geisinger-Lewistown Hospital and Geisinger Wyoming Valley Medical Center.
When was this NPI record last updated?
The NPPES record for Dean Williams was last updated on June 2, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 months 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.
# Dean J Williams, M.D. · NPI 1104841501
Emergency Medicine physician in Erie, Colorado. Individual provider, active in the CMS NPPES registry since July 13, 2006.
## Identity
- **NPI:** 1104841501 (Entity type: Individual)
- **Enumerated:** July 13, 2006
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 48666 (Colorado)
- **Sole proprietor:** Yes
## Practice location
- **Address:** PO BOX 252, Erie, CO 80516-0252
- **Phone:** (720) 505-1753
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 18 organizations under Medicare reassignment (form CMS-855R): Usacs Community Emergency Services Of Colorado, Inc. (NPI 1548895030, Dacono, CO); Brighton Community Emergency Physicians Lpa (NPI 1639454242, Brighton, CO); North Platte Nebraska Hospital Corporation (NPI 1134355332, North Platte, NE); Lechee Health Facility (NPI 1831448398, Lechee, AZ); St. Joseph's Hospital And Health Center (NPI 1669491262, Beach, ND); and 13 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Calgary, Faculty Of Medicine, class of 1994
## Record status
- **NPPES last updated:** June 2, 2026
---
Source: [NPI Profile](https://npiprofile.com/npi/1104841501) · Data from the CMS NPPES public registry.