Grayson Steedman Halladay, PA-C
Surgical Physician Assistant · Phoenix, AZ
Grayson Steedman Halladay, PA-C is a surgical physician assistant with a practice address in Phoenix, Arizona, and NPI 1225589021, issued on Oct 18, 2016. Check the license (Arizona 6575, as entered in NPPES) with the Arizona board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Grayson Steedman Halladay
- Credential
- PA-C
- Primary taxonomy
- Surgical Physician Assistant 363AS0400X
- License number
- 6575 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 9321 W Thomas RD Ste 205, Phoenix, AZ 85037
- Phone
- (866) 974-2673
- Enumerated
- Oct 18, 2016
- Record last updated
- Aug 13, 2025
- Fax
- (866) 939-2673
- Medicaid ID
- 212451 AZ
- Medicare enrollment
- Enrolled (PECOS I20161212002005); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest surgical physician assistant records → All 420 in Arizona → Look up another NPI →
Also registered at 9321 W Thomas RD Ste 205
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Justin Butler, DOOrthopaedic Surgery Physician1396246583
- Robert Cercek, MDOrthopaedic Surgery Physician1962621292
- Jack Goforth, DPTPhysical Therapist1922957844
- Zachary Hahn, PA-CPhysician Assistant1891363420
- Kolby Hemmele, PA-CPhysician Assistant1962030734
- Jessica Hepburn, PA-CSurgical Physician Assistant1649505181
Verify Grayson Steedman Halladay in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Arizona board licenses this profession
Search for license 6575Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
5.5 times the Medicare Part D claims of the average surgical physician assistant in 2024
1,659 Medicare Part D claims for 488 beneficiaries, against an average of 304 among the 10,174 providers of this specialty who prescribed in Part D. 217 claims were for opioids.
Most prescribed
- Diclofenac Sodium722 claims
- Tizanidine Hcl503 claims
- Oxycodone Hcl117 claims
- Tramadol Hcl68 claims
- Methylprednisolone65 claims
- Celecoxib60 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 82.5 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Center For Orthopedic Research And Education LLCSun City, AZ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Grayson Steedman Halladay among 420 surgical physician assistant records in Arizona
Grayson Steedman Halladay, PA-C is one of 420 surgical physician assistant records with a practice address in Arizona. 70% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 64% of them.
- NPI issued2016 · 64% of these records are older, 33% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated2016 · median 2015 among the 270 with a school on file
- Record last updated2025 · 45% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363AS0400X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Surgical Physician Assistant providers in Arizona
There are 420 surgical physician assistant records in Arizona.
All 420 in Arizona → Every provider in Phoenix → Surgical Physician Assistant nationwide →
The 8 surgical physician assistant records with the nearest ZIP codes
- Amanda Chapman, PA-CPhoenix, AZ 850371457339723
- Jessica Hepburn, PA-CPhoenix, AZ 850371649505181
- Sandra Ballehr, PA-CPhoenix, AZ 850321265640551
- Perry Brazel, PA-CPhoenix, AZ 850321023327251
- Dee Ensign, PAPhoenix, AZ 850321043854623
- James Hutchison, P.A.-CPhoenix, AZ 850321407805229
- Timothy Smith, PAPhoenix, AZ 850441487834297
- James Herzog, C.S.A.Phoenix, AZ 850451437190824
Common questions
What is Grayson Steedman Halladay, PA-C's NPI number?
Grayson Steedman Halladay, PA-C's National Provider Identifier (NPI) is 1225589021, issued on Oct 18, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Grayson Steedman Halladay, PA-C located?
The NPPES record lists a practice address at 9321 W Thomas RD Ste 205, Phoenix, AZ, 85037. Phone: (866) 974-2673. Providers update this record themselves, so call before visiting.
How can I verify Grayson Steedman Halladay, PA-C's license?
NPPES lists Arizona license number 6575, as entered by the provider. Search the Arizona board that licenses this profession; the NPPES record confirms identity only.
How much does Grayson Steedman Halladay, PA-C prescribe under Medicare Part D?
In 2024, Grayson Steedman Halladay, PA-C had 1,659 Medicare Part D claims for 488 beneficiaries; the average among surgical physician assistant prescribers was 304. Part D covers Medicare prescriptions only.
What is Grayson Steedman Halladay, PA-C's MIPS final score?
The 2023 MIPS final score is 82.5 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.