Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Mrs. Holly Ann Greiner, FNP

Individual provider Family Nurse Practitioner · NPI 1609313006

Mrs. Holly Ann Greiner, FNP is a Nurse Practitioner in Dansville, New York. Qualified in 2016, 10 years ago. Practices with The Frederick Ferris Thompson Hospital, a 228-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in New York.

Years since qualifying
10
Licensed in
NY
In the registry since
2017
What do these letters mean?
FNP — Family Nurse Practitioner
A nurse practitioner who treats patients of all ages, much like a family doctor.

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Practice location Address checks out

111 Clara Barton St
Dansville, NY 14437-9503
Phone: (585) 335-6001
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 184 Barton St, Buffalo, NY 14213-1573 — (716) 881-6191

Specialties & licences

Family Nurse Practitioner (primary) Taxonomy 363LF0000X · Licence 341316 (NY)

Record details

NPI number1609313006
Entity typeIndividual (Type 1)
GenderFemale
Credentials FNP
Sole proprietorYes
NPI enumeratedJanuary 23, 2017
Last updated in NPPESJanuary 6, 2022
Certification dateJanuary 6, 2022

Medicare enrollment

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

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2016 (10 years in practice)
Group practice The Frederick Ferris Thompson Hospital — 228 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
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 patients154
Services billed 159 a service is one billed item, such as a visit, a test or a procedure
Average patient age68

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.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

  • F F Thompson Hospital Hospital · Canandaigua, NY

Colleagues at The Frederick Ferris Thompson Hospital

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 228 clinicians in the practice; 12 are shown here.

Other providers in Dansville