Alissa Gregersen, AG-ACNP
Individual provider Active NPI Nurse Practitioner · Waterville, ME
NPI 1922508902 · NPPES record last updated May 27, 2026
Key facts
- NPI
- 1922508902
- Entity type
- Individual (NPI type 1)
- Primary specialty
- Nurse Practitioner 363L00000X
- License
- CNP251909 (ME)
- Practice address
- 149 North St
Waterville, ME 04901-4974 - Phone
- (207) 872-1307
- Fax
- (207) 872-1302
- NPI assigned
- Feb 16, 2018
- Sex
- Female
- Sole proprietor
- No
Organizations & group practices 18
Hospital & facility affiliations 1
Medicare Care Compare profile
- Specialty
- Nurse Practitioner
- Education
- Other, 2017
- Medicare assignment
- Accepts the Medicare-approved amount as payment in full
- Group practices
- Bayhealth Medical Center, Inc
Practice addresses (Care Compare)
640 S State St
Dover, DE 19901-3530
Phone (302) 744-7156
Hospital & facility affiliations
- Bayhealth Medical Center, Kent Campus
Medicare participation
- Medicare fee-for-service enrollment
- Enrolled in DE
- Eligible to order & refer
- Part B services: Yes · DME: Yes · Home health: Yes · Power mobility devices: Yes · Hospice: No
Medicare enrollment records
| Enrollment ID | State | Provider type | PAC ID | Details |
|---|---|---|---|---|
| I20180502000636 | DE | Practitioner - Nurse Practitioner | 5092079863 | Reassigns benefits to 2 organizations |
National Provider Directory
- Medicare enrollment (NPD)
- Yes
- Credentials
- Nurse Practitioner
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| LP-0000239 | DE | MD | Nurse Practitioner |
| CNP251909 | ME | MD | Nurse Practitioner |
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| Bayhealth Medical Center, Inc. | Current |
Accepting new patients | |
| Bayhealth Medical Center, Inc | Current |
Accepting new patients | |
| Bayhealth Emergency Physicians LLC | Current |
Accepting new patients |
Locations
640 S State St
#3055
Dover, DE 19901
Phone (302) 480-1688
640 S State St
Dover, DE 19901
Phone (302) 744-4700
100 Wellness Way
Milford, DE 19963
Phone (302) 422-3311
Specialties & licenses
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Gerontology Nurse Practitioner | 363LG0600X | LP-0000239 | DE | |
| Nurse Practitioner | 363L00000X | LP-0000239 | DE | |
| Nurse Practitioner | 363L00000X | CNP251909 | ME | Yes |
Addresses
Primary practice location
149 North St
Waterville, ME 04901-4974
Mailing address
149 North St
Waterville, ME 04901-4974
Phone (207) 872-1307
Other providers in Waterville, ME
- Erica Goss
- Chelsea Gourley
- Sara Beth Graf
- Monica Elsie Graves
- Jennifer Florence Greene
- Skye Gregory-Hatch
- Mary Ellen Gregory
- Hannah Grenier
- Patricia A. Grenier
- Margaret B Griffin
All providers in Waterville, ME · Nurse Practitioner in Maine
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Record last updated by the provider on May 27, 2026. Information in NPPES is self-reported and not verified by CMS.
- NUCC Health Care Provider Taxonomy: specialty names.
- Medicare Fee-For-Service Public Provider Enrollment (CMS/PECOS): enrollments, PAC IDs and benefit reassignments.
- Order and Referring (CMS).
- Medicare Care Compare provider data (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.