Alissa Gregersen , AG-ACNP
Nurse Practitioner • Waterville, ME
Professional Overview & Biography Verified Profile Summary
Alissa Gregersen, AG-ACNP is a certified Nurse Practitioner practicing in Waterville, ME. With approximately 9 years of clinical experience since completing medical education in 2017, Alissa Gregersen delivers high-quality medical care to the local community at 149 NORTH ST.
Alissa Gregersen is affiliated with Bayhealth Medical Center, Inc and accepts Medicare assignment.
Frequently performed procedures and clinical services include initial hospital care with moderate level of medical decision making, if using time, at least, hospital discharge day management, subsequent hospital care with moderate levelof medical decision making, if using time, at least. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.
Practice Location & Contact Primary Location
149 North St
Waterville, ME 049014974
Medicare Profile & Education
Other
2017
✓ Accepts Assignment
In-Person Only
Specialty Benchmarks & Practice Insights
Comparative analytics for Nurse Practitioner in Waterville, ME
Practicing in Waterville, ME (460 Statewide)
In-Person Office Visits Only
Under CMS Medicare Fee Schedule vs Standard Submitted Charges
Clinical Seniority & Experience Comparison
Performed Procedures & Service Volume
Top Medicare Part B procedures performed by this practitioner
| HCPCS Code & Description | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
|
99223
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes
|
41 | 40 | $702.80 | $142.57 |
|
99238
Hospital discharge day management, 30 minutes or less
|
37 | 37 | $259.62 | $66.96 |
|
99233
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes
|
16 | 16 | $372.63 | $98.03 |
|
99236
Initial hospital care with same-day admission and discharge with high level of medical decision making, per day, if using time, at least 85 minutes
|
13 | 13 | $806.00 | $172.12 |
Medical Specialties & State Licenses
CMS Verified: 2026-05-27NUCC Taxonomy Code: 363L00000X
(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.
NUCC Taxonomy Code: 363LG0600X
Definition to come...
NUCC Taxonomy Code: 363L00000X
(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.
Hospital & Practice Group Affiliations
Bayhealth Medical Center, Inc
640 S State St, Dover, DE 199013530
Phone: 3027447156
Practice Associates & Co-Workers
Healthcare professionals and specialists practicing at this location or sharing practice phone/fax
Physician Assistant
Physician Assistant
Physician Assistant
Physician Assistant
Emergency Medicine
Doctor of Medicine (M.D.)
Physician Assistant
Physician Assistant
Emergency Medicine
Doctor of Medicine (M.D.)
Emergency Medicine
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Chronological log of verified NPI updates, location relocations, credentials, and registry changes
Registered at 149 NORTH ST, WATERVILLE, ME 049014974 (Tel: 2078721307)
Registered at 149 NORTH ST, WATERVILLE, ME 049014974 (Tel: 2078721307)
Registered at 640 S STATE ST, MAIL CODE 3055, DOVER, DE 199013530 (Tel: 3024801688)
Nurse Practitioner (License #LP-0000239 in DE)
NPI status registered as active in NPPES database
Registered at 640 S STATE ST, DOVER, DE 199013530 (Tel: 3026744700)
Registered at 640 S STATE ST, DOVER, DE 199013530
Recorded as ALISSA GREGERSEN, AG-ACNP
Nurse Practitioner (License #LP-0000239 in DE)
First registered as active Individual Practitioner in NPPES Database.
Patient & Community Reviews
Verified patient ratings, medical care experiences, and facility photos
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NPI Administrative Meta
Mailing Address
149 North St
Waterville, ME 049014974
Phone: 2078721307
This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.