William Horn, NP
Nurse Practitioner · Jacksonville, FL
William Horn, NP is a nurse practitioner with a practice address in Jacksonville, Florida, and NPI 1518928019, issued on Apr 1, 2006. Check the license (Florida ARNP3027962, as entered in NPPES) on the Florida health license search; the Medicare figures below come from public CMS files.
- Name
- William Horn
- Credential
- NP
- Primary taxonomy
- Nurse Practitioner 363L00000X
- License number
- ARNP3027962 FL
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
- Apr 1, 2006
- Record last updated
- Sep 2, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20050523000681); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest nurse practitioner records → All 8,844 in Florida → Look up another NPI →
Also registered at 4500 San Pablo RD S
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Verify William Horn in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersFlorida health license search
Search for license ARNP3027962Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
89% fewer Medicare Part D claims than the average nurse practitioner in 2024
125 Medicare Part D claims for 69 beneficiaries, against an average of 1,109 among the 54,319 providers of this specialty who prescribed in Part D. 34 claims were for opioids.
Most prescribed
- Methocarbamol28 claims
- Oxycodone Hcl19 claims
- Hydrocodone-Acetaminophen14 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): 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 2 group practices
- Mayo Clinic JacksonvilleJacksonville, FL
- Paragon Emergency Services LLCJacksonville, FL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Horn among 8,844 nurse practitioner records in Florida
William Horn, NP is one of 8,844 nurse practitioner records with a practice address in Florida. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 3% of them.
- NPI issued2006 · 3% of these records are older, 85% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 51% of these records are
- Graduated2004 · median 2018 among the 4,492 with a school on file
- Record last updated2020 · 41% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363L00000X and a Florida practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
872 nurse practitioner records list a practice address in Jacksonville
They are 872 of the 24,194 NPPES records with a practice address in Jacksonville, and 8,844 nurse practitioner records in Florida.
All 8,844 in Florida → Every provider in Jacksonville → Nurse Practitioner nationwide →
The 8 nurse practitioner records with the nearest ZIP codes
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- Lois Hemminger, ARNPJacksonville, FL 322241215928304
- Leslie Janik, ARNPJacksonville, FL 322241942291034
- Mary Lesperance, ARNPJacksonville, FL 322241679564769
- Linda Marks, DNPJacksonville, FL 322241396736484
- Kathleen Mullen, ARNPJacksonville, FL 322241205827391
Common questions
What is William Horn, NP's NPI number?
William Horn, NP's National Provider Identifier (NPI) is 1518928019, issued on Apr 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William Horn, NP 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 William Horn, NP's license?
NPPES lists Florida license number ARNP3027962, 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.
How much does William Horn, NP prescribe under Medicare Part D?
In 2024, William Horn, NP had 125 Medicare Part D claims for 69 beneficiaries; the average among nurse practitioner prescribers was 1,109. Part D covers Medicare prescriptions only.
What is William Horn, NP'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.