Steven Mackay, PA-C
Physician Assistant · Jacksonville, FL
Steven Mackay, PA-C is a physician assistant with a practice address in Jacksonville, Florida, and NPI 1508300187, issued on Dec 15, 2016. Check the license (Florida PA9115298, as entered in NPPES) on the Florida health license search; the Medicare figures below come from public CMS files.
- Name
- Steven Mackay
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License numbers
- PA9115298 FL
MA058623 PA
Self-reported in NPPES; status is on the state search - Practice location
- 4500 San Pablo RD S, Jacksonville, FL 32224
- Phone
- (904) 953-2000
- Enumerated
- Dec 15, 2016
- Record last updated
- Apr 8, 2022
- Medicare enrollment
- Enrolled (PECOS I20220211000028); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 10,257 in Florida → Look up another NPI →
Also registered at 4500 San Pablo RD S
A shared address usually means a shared clinic or building; it does not show who employs whom.
- David Abarbanel, MDNeurology Physician1598298242
- Ejigayehu Abate, MDEndocrinology, Diabetes & Metabolism Physician1679615116
- Suhny Abbara, MDDiagnostic Radiology Physician1538150180
- Sara Abbas, PA-CPhysician Assistant1356121206
- Carol Abbott, ARNP, FNP-CNurse Practitioner1629427240
- Zaid Abdel Rahman, M.D.Hematology (Internal Medicine) Physician1003299330
Verify Steven Mackay in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersFlorida health license search
Search for license PA9115298Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 76.2 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
- Mayo Clinic JacksonvilleJacksonville, FL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Steven Mackay among 10,257 physician assistant records in Florida
Steven Mackay, PA-C is one of 10,257 physician assistant records with a practice address in Florida. 77% 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 43% of them.
- NPI issued2016 · 43% of these records are older, 53% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated2016 · median 2018 among the 5,867 with a school on file
- Record last updated2022 · 37% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a Florida practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
842 physician assistant records list a practice address in Jacksonville
They are 842 of the 24,194 NPPES records with a practice address in Jacksonville, and 10,257 physician assistant records in Florida.
All 10,257 in Florida → Every provider in Jacksonville → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Monica Alexanderson, PAJacksonville, FL 322241093796997
- Grace Bryan, PACJacksonville, FL 322241003897232
- Shilpa Gajarawala, PACJacksonville, FL 322241265413496
- Jeffrey Green, PA-CJacksonville, FL 322241912979584
- Melanie Harrell, PA-CJacksonville, FL 322241215918131
- Julieann Johnson, PAJacksonville, FL 322241518948744
- Gary Long, PAJacksonville, FL 322241437130341
- Karen Mayes, PAJacksonville, FL 322241437154887
Common questions
What is Steven Mackay, PA-C's NPI number?
Steven Mackay, PA-C's National Provider Identifier (NPI) is 1508300187, issued on Dec 15, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Steven Mackay, PA-C located?
The NPPES record lists a practice address at 4500 San Pablo RD S, Jacksonville, FL, 32224. Phone: (904) 953-2000. Providers update this record themselves, so call before visiting.
How can I verify Steven Mackay, PA-C's license?
NPPES lists Florida license number PA9115298, as entered by the provider. Search the Florida health license search at https://mqa-internet.doh.state.fl.us/mqasearchservices/healthcareproviders. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
What is Steven Mackay, PA-C's MIPS final score?
The 2023 MIPS final score is 76.2 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.