IAN WILLIAMSON
NPI 1396696381
Physical Therapist in Glendale, AZ
About Ian Williamson NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
IAN WILLIAMSON (NPI 1396696381) is an individual physical therapist in Glendale, Arizona and active in the NPI registry since February 2026. He is a graduate of Other (2025).
NPPES Registry Identity
Specialties & Licenses
- Diagnose and manage movement dysfunction and enhance physical and functional abilities.
- Restore, maintain, and promote not only optimal physical function but optimal wellness and fitness and optimal quality of life as it relates to movement and health.
- Prevent the onset, symptoms, and progression of impairments, functional limitations, and disabilities that may result from diseases, disorders, conditions, or injuries.
- Treat conditions of the musculoskeletal, neuromuscular, cardiovascular, pulmonary, and/or integumentary systems.
- Address the negative effects attributable to unique personal and environmental factors as they relate to human performance.
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
Ian Williamson 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 Reassignment
Medicare enrollment records show Ian Williamson reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Phoenix, AZ 85022
- Reassigned Medicare billing, Arizona enrollment
- 436 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 85305 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 4
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 Ian Williamson's NPI number?
The NPI number for Ian Williamson is 1396696381. It was assigned to this individual provider in the NPPES registry on February 5, 2026.
Where is Ian Williamson located?
Ian Williamson practices at 9494 W Northern Ave Ste 114&115, Glendale, AZ 85305. The listed phone number is (623) 745-3112.
What is Ian Williamson's specialty?
The primary specialty registered for this NPI is Physical Therapist with taxonomy code 225100000X.
Is Ian Williamson enrolled in Medicare?
Yes. Ian Williamson 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 organization bills Medicare for Ian Williamson's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ian Williamson reassigns Medicare benefits to Ati Holdings Of Arizona, LLC (Phoenix, AZ). The 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 Ian Williamson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Ian Williamson accept?
Health plans from Ambetter Health and Ambetter from Arizona Complete Health list Ian Williamson 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 Ian Williamson was last updated on February 5, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.