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

Alissa Gregersen, AG-ACNP

Individual provider Gerontology Nurse Practitioner · NPI 1922508902

Alissa Gregersen, AG-ACNP is a Nurse Practitioner in Waterville, Maine. Qualified in 2017, 9 years ago. Practices with Bayhealth Medical Center, Inc, a 401-clinician group and accepts Medicare assignment. Licensed in Delaware and Maine.

Years since qualifying
9
Licensed in
DE, ME
In the registry since
2018
Specialties on file
3

Practice location Address checks out

149 N St
Waterville, ME 04901-4974
Phone: (207) 872-1307
Fax: (207) 872-1302
Show map & directions

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

Specialties & licences

Nurse Practitioner (primary) Taxonomy 363L00000X · Licence CNP251909 (ME)
Gerontology Nurse Practitioner Taxonomy 363LG0600X · Licence LP-0000239 (DE)
Nurse Practitioner Taxonomy 363L00000X · Licence LP-0000239 (DE)

Record details

NPI number1922508902
Entity typeIndividual (Type 1)
GenderFemale
Credentials AG-ACNP
Sole proprietorNo
NPI enumeratedFebruary 16, 2018
Last updated in NPPESMay 27, 2026
Certification dateMay 27, 2026
Mailing address149 North St, Waterville, ME 04901-4974

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 Bayhealth Medical Center, Inc — 401 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount