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

Mrs. Karen E. Nieminski, FNP

Individual provider Family Nurse Practitioner · NPI 1396764114

Mrs. Karen E. Nieminski, FNP is a Nurse Practitioner in Montrose, New York. Qualified in 1995, 31 years ago. Practices with State of New York Comptrollers Office, a 165-clinician group. Licensed in New York.

Years since qualifying
31
Licensed in
NY
In the registry since
2006
What do these letters mean?
FNP — Family Nurse Practitioner
A nurse practitioner who treats patients of all ages, much like a family doctor.

See every abbreviation used in this directory →

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Practice location Address checks out

2166 Albany Post Rd
Montrose, NY 10548-1039 Not confirmed with CMS for 19 years — call before visiting
Phone: (914) 737-4400
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Nurse Practitioner (primary) Taxonomy 363LF0000X · Licence F331240-1 (NY)

Record details

NPI number1396764114
Entity typeIndividual (Type 1)
GenderFemale
Credentials FNP
Sole proprietorYes
NPI enumeratedJuly 19, 2006
Last updated in NPPESJuly 8, 2007

Medicare enrollment

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

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 1995 (31 years in practice)
Group practice State Of New York Comptrollers Office — 165 clinicians
Accepts Medicare assignment Not indicated

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 patients12
Services billed 13 a service is one billed item, such as a visit, a test or a procedure
Average patient age79

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.

Colleagues at State of New York Comptrollers Office

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 165 clinicians in the practice; 12 are shown here.

Other providers in Montrose