Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Mr. John Francis Sharkey IV, NP-C

Individual provider Adult Health Nurse Practitioner · NPI 1336532456

Mr. John Francis Sharkey IV, NP-C is a Nurse Practitioner in Greenville, South Carolina. Qualified in 2014, 12 years ago. Practices with Carolina Nephrology PA, a 37-clinician group, accepts Medicare assignment and offers telehealth. Licensed in South Carolina.

Years since qualifying
12
Licensed in
SC
In the registry since
2015
Specialties on file
3
What do these letters mean?
NP-C — Nurse Practitioner, Certified
A nurse practitioner certified by the AANP.

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Practice location Address checks out

203 Mills Ave
Greenville, SC 29605-4019 Not confirmed with CMS for 11 years — call before visiting
Phone: (864) 271-1844
Fax: (864) 271-2147
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Adult Health Nurse Practitioner (primary) Taxonomy 363LA2200X · Licence 19347 (SC)
Gerontology Nurse Practitioner Taxonomy 363LG0600X · Licence 19347 (SC)
Primary Care Nurse Practitioner Taxonomy 363LP2300X · Licence 19347 (SC)

Record details

NPI number1336532456
Entity typeIndividual (Type 1)
GenderMale
Credentials NP-C
Sole proprietorNo
NPI enumeratedMarch 13, 2015
Last updated in NPPESMarch 13, 2015

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2014 (12 years in practice)
Group practice Carolina Nephrology Pa — 37 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations4 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients372
Services billed 1,860 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $1,035 45 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Carolina Nephrology PA

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 37 clinicians in the practice; 12 are shown here.

Other providers in Greenville