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

William James Grenier, APRN, NP-C

Individual provider Family Nurse Practitioner · NPI 1154626521

William James Grenier, APRN, NP-C is a Nurse Practitioner in Louisville, Kentucky. Qualified in 2008, 18 years ago. Practices with Impact Physician Group Massachusetts PLLC, a 5-clinician group and accepts Medicare assignment. Licensed in Florida, Indiana, Kentucky and North Carolina and 1 more.

Years since qualifying
18
Licensed in
FL, IN, KY, NC, OH
In the registry since
2011
Specialties on file
5
What do these letters mean?
APRN — Advanced Practice Registered Nurse
The umbrella licence covering nurse practitioners, midwives, anaesthetists and clinical nurse specialists.
NP-C — Nurse Practitioner, Certified
A nurse practitioner certified by the AANP.

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Practice location Address checks out

10401 Linn Station Rd Ste 100
Louisville, KY 40223-3842
Phone: (502) 589-8600
Fax: (855) 632-8329
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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 3006776 (KY)
Family Nurse Practitioner Taxonomy 363LF0000X · Licence APRN.CNP.019811 (OH)
Family Nurse Practitioner Taxonomy 363LF0000X · Licence 5008544 (NC)
Family Nurse Practitioner Taxonomy 363LF0000X · Licence 71006200A (IN)
Family Nurse Practitioner Taxonomy 363LF0000X · Licence 9421762 (FL)

Record details

NPI number1154626521
Entity typeIndividual (Type 1)
GenderMale
Credentials APRN , NP-C
Sole proprietorYes
NPI enumeratedJanuary 17, 2011
Last updated in NPPESJuly 13, 2023
Certification dateJuly 13, 2023

Medicare enrollment

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

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2008 (18 years in practice)
Group practice Impact Physician Group Massachusetts Pllc — 5 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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