DR. GLENDA GAYLE WILLIAMS M.D.
NPI 1639379605
Internal Medicine in Phoenix, AZ
About Dr. Glenda Gayle Williams M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. GLENDA GAYLE WILLIAMS M.D. (NPI 1639379605) is an individual internal medicine provider in Phoenix, Arizona, licensed in Arizona (81250) and active in the NPI registry since July 2007. She is enrolled in Medicare PECOS and is a graduate of Other (2007).
NPPES Registry Identity
Specialties & Licenses
Other Names 1
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
Dr. Glenda Gayle 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
2Medicare enrollment records show Glenda Williams reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Phoenix, AZ 85012
- Reassigned Medicare billing, Arizona enrollment
- 271 clinicians in this Medicare group
Mesa, AZ 85205
- Reassigned Medicare billing, Arizona enrollment
- 110 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 85021 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 5
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Glenda Williams's NPI number?
The NPI number for Glenda Williams is 1639379605. It was assigned to this individual provider in the NPPES registry on July 19, 2007. The provider is also known as Dr. Glenda-Gayle Haskin MD.
Where is Glenda Williams located?
Glenda Williams practices at 8913 N 19th Ave, Phoenix, AZ 85021. The listed phone number is (602) 858-4361.
What is Glenda Williams's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Glenda Williams enrolled in Medicare?
Yes. Glenda 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 Glenda Williams's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Glenda Williams reassigns Medicare benefits to 2 organizations: Banner Primary Care Physicians Arizona LLC (Phoenix, AZ) and Archwell Health Professional Services Of Arizona, LLC (Mesa, AZ). 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 Glenda Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Glenda Williams accept?
Health plans from Ambetter Health, Ambetter from Arizona Complete Health, Blue Cross Blue Shield of Arizona, Oscar Health Plan, Inc. and UnitedHealthcare list Glenda 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.
When was this NPI record last updated?
The NPPES record for Glenda Williams was last updated on January 19, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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. Glenda Gayle Williams, M.D. · NPI 1639379605
Internal Medicine physician in Phoenix, Arizona. Individual provider, active in the CMS NPPES registry since July 19, 2007.
## Identity
- **NPI:** 1639379605 (Entity type: Individual)
- **Enumerated:** July 19, 2007
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 81250 (Arizona)
- **Sole proprietor:** No
## Practice location
- **Address:** 8913 N 19TH AVE, Phoenix, AZ 85021-4206
- **Phone:** (602) 858-4361
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Banner Primary Care Physicians Arizona LLC (NPI 1417238908, Phoenix, AZ); Archwell Health Professional Services Of Arizona, LLC (NPI 1558026880, Mesa, AZ) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2007
## Record status
- **NPPES last updated:** January 19, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1639379605) · Data from the CMS NPPES public registry.