Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Olivia Lemaster, APRNCNP

Individual provider Registered Nurse · NPI 1679005995

Olivia Lemaster, APRNCNP is a Nurse Practitioner in Marysville, Ohio. Qualified in 2017, 9 years ago. Practices with Union County Physician Corporation, a 106-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Ohio.

Years since qualifying
9
Licensed in
OH
In the registry since
2017
Specialties on file
3
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Practice location Address checks out

500 London Ave
Marysville, OH 43040-5512
Phone: (937) 578-2020
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Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 460 W 10th Ave, Columbus, OH 43210-1240 — (614) 293-8300

Specialties & licences

Nurse Practitioner (primary) Taxonomy 363L00000X · Licence APRN.CNP.021209 (OH)
Registered Nurse Taxonomy 163W00000X · Licence RN.371432 (OH)
Acute Care Nurse Practitioner Taxonomy 363LA2100X · Licence APRNCNP021209 (OH)

Record details

NPI number1679005995
Entity typeIndividual (Type 1)
GenderFemale
Credentials APRNCNP
Sole proprietorNo
NPI enumeratedMarch 28, 2017
Last updated in NPPESMay 18, 2023
Certification dateMay 18, 2023

Medicare enrollment

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

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2017 (9 years in practice)
Group practice Union County Physician Corporation — 106 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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 patients151
Services billed 245 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

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.

Education $100 1 payment · educational material or training, 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. Those with a page here are linked.

  • Mary Rutan Hospital Hospital · Bellefontaine, OH
  • Memorial Hospital Hospital · Marysville, OH

Also affiliated with 1 hospital, which CMS identifies by certification number only.

Colleagues at Union County Physician Corporation

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 106 clinicians in the practice; 12 are shown here.

Other providers in Marysville