DR. WILLIAM DENNIS MD
NPI 1629040118
Emergency Medicine in Glendale, AZ
About Dr. William Dennis Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. WILLIAM DENNIS MD (NPI 1629040118) is an individual emergency medicine provider in Glendale, Arizona, licensed in Arizona (61158) and active in the NPI registry since February 2006. He is enrolled in Medicare PECOS and maintains a secondary practice location in Suffolk.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
Other Identifiers 2
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. William Dennis Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show William Dennis reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Anaconda, MT 59711
- Reassigned Medicare billing, Montana enrollment
- 104 clinicians in this Medicare group
Alton, IL 62002
- Reassigned Medicare billing, Missouri enrollment
- 343 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
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 85308 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
GLENDALE, AZ 85308
GLENDALE, AZ 85308
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 William Dennis's NPI number?
The NPI number for William Dennis is 1629040118. It was assigned to this individual provider in the NPPES registry on February 7, 2006.
Where is William Dennis located?
William Dennis practices at 18701 N 67th Ave, Glendale, AZ 85308. The listed phone number is (623) 561-1000.
What is William Dennis's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is William Dennis enrolled in Medicare?
Yes. William Dennis is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for William Dennis's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Dennis reassigns Medicare benefits to 2 organizations: Community Hospital Of Anaconda (Anaconda, MT) and Southeastern Emergency Physicians Of Memphis LLC (Alton, IL). 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 William Dennis's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does William Dennis accept?
Health plans from Cigna Healthcare list William Dennis 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.
When was this NPI record last updated?
The NPPES record for William Dennis was last updated on April 14, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years 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.
# Dr. William Dennis, MD · NPI 1629040118
Emergency Medicine physician in Glendale, Arizona. Individual provider, active in the CMS NPPES registry since February 7, 2006.
## Identity
- **NPI:** 1629040118 (Entity type: Individual)
- **Enumerated:** February 7, 2006
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 61158 (Arizona)
- **Sole proprietor:** No
## Practice location
- **Address:** 18701 N 67TH AVE, Glendale, AZ 85308-7100
- **Phone:** (623) 561-1000
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Community Hospital Of Anaconda (NPI 1538597703, Anaconda, MT); Southeastern Emergency Physicians Of Memphis LLC (NPI 1437105277, Alton, IL) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** April 14, 2021
- **Other identifiers:** Other 1629040118 (MT); Medicaid 101277407 (PA)
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Source: [NPI Profile](https://npiprofile.com/npi/1629040118) · Data from the CMS NPPES public registry.