Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Grayson Steedman Halladay, PA-C

Surgical Physician Assistant in Phoenix, AZ · enumerated 2016 · practices at Center for Orthopedic Research and Education, LLC.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1225589021

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Registry record

Entity type Individual (Type 1)

Name Grayson Steedman Halladay

Credential PA-C

Sex Male

Practice address 9321 W Thomas Rd Ste 205, Phoenix, AZ, 85037

Phone (866) 974-2673

Fax (866) 939-2673

Enumeration date Oct 18, 2016

Last updated in NPPES Aug 13, 2025

Taxonomy & licenses

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers Secondary

363AS0400X Surgical Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 6575 (AZ) Primary

Other identifiers

Identifier	Type	State	Issuer
212451	Medicaid	AZ	-

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Grayson Halladay practice?

The practice location on file with NPPES is in Phoenix, AZ. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Grayson Halladay?

The National Provider Identifier (NPI) for Grayson Halladay is 1225589021, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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David Jackson Orthopaedic Surgery of the Spine Physician · Phoenix, AZ NPI 1144364696 Robert Cercek Orthopaedic Surgery Physician · Phoenix, AZ NPI 1962621292 John Wallace Pain Medicine Physician · Phoenix, AZ NPI 1225292634 Harvinder Kumar Neurology Physician · Phoenix, AZ NPI 1881859460 Ryan Scott Foot & Ankle Surgery Podiatrist · Phoenix, AZ NPI 1053554600 Jessica Hepburn Surgical Physician Assistant · Phoenix, AZ NPI 1649505181 Sara Maldonado Physician Assistant · Phoenix, AZ NPI 1093160723 Justin Butler Orthopaedic Surgery Physician · Phoenix, AZ NPI 1396246583

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-08-13.