What is Alissa Gregersen's NPI number?

Alissa Gregersen's National Provider Identifier (NPI) is 1922508902, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Alissa Gregersen's specialty?

Alissa Gregersen is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).

Where is Alissa Gregersen located?

Alissa Gregersen's practice location on file with NPPES is 149 North St, Waterville, ME 04901-4974.

What is Alissa Gregersen's phone number?

The practice phone number listed in the NPPES registry for Alissa Gregersen is (207) 872-1307.

Does Alissa Gregersen accept Medicare?

Alissa Gregersen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.

Is Alissa Gregersen's NPI active?

Yes — Alissa Gregersen's NPI (1922508902) is active in the NPPES registry as of the last update on 2026-05-27.

IndividualActiveAccepts Medicare

Alissa Gregersen, AG-ACNP

NPI 1922508902 · Nurse Practitioner · Waterville, ME

Alissa Gregersen, AG-ACNP is a Nurse Practitioner provider in Waterville, ME (NPI 1922508902).

Provider details

NPI number: 1922508902
Entity type: Individual
Primary specialty: Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
Credential: AG-ACNP
Sex: Female
Sole proprietor: No
License: LP-0000239 (DE)

Practice location

149 North St

Waterville, ME 04901-4974

Phone: (207) 872-1307

Fax: (207) 872-1302

Street-level locationGet directions

More ME providers

Mailing address

149 North St

Waterville, ME 04901-4974

Specialties & taxonomies

Nurse PractitionerPrimary363L00000XLicense CNP251909 (ME)
Physician Assistants & Advanced Practice Nursing Providers
Gerontology Nurse Practitioner363LG0600XLicense LP-0000239 (DE)
Physician Assistants & Advanced Practice Nursing Providers
Nurse Practitioner363L00000XLicense LP-0000239 (DE)
Physician Assistants & Advanced Practice Nursing Providers

Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)

Profile Score

Established profile(53/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure28% of score
8 yrs in NPPES registry
Profile completeness28% of score
100% of core fields populated
Practice footprint17% of score
1 documented practice location
Medicare service volume (vs. specialty peers)28% of score
107 Medicare services, 2024 (ranked within specialty)

Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.

What this provider does (Medicare)

Based on Medicare fee-for-service claims, 2024; not all care is captured.

Service (HCPCS)	Medicare services	Typical Medicare-allowed (2024)
Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223	41	$143
Hospital Discharge Day Management, 30 Minutes Or Less99238	37	$67
Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233	16	$98
Initial Hospital Care With Same-Day Admission and Discharge With High Level of Medical Decision Making, Per Day, If Using Time, at Least 85 Minutes99236	13	$172

Typical Medicare-allowed amounts for these services range $67–$172 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.

Enumerated: 2018-02-16
Last updated: 2026-05-27
Certified: 2026-05-27

Frequently asked questions

What is Alissa Gregersen's NPI number?: Alissa Gregersen's National Provider Identifier (NPI) is 1922508902, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is Alissa Gregersen's specialty?: Alissa Gregersen is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
Where is Alissa Gregersen located?: Alissa Gregersen's practice location on file with NPPES is 149 North St, Waterville, ME 04901-4974.
What is Alissa Gregersen's phone number?: The practice phone number listed in the NPPES registry for Alissa Gregersen is (207) 872-1307.
Does Alissa Gregersen accept Medicare?: Alissa Gregersen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
Is Alissa Gregersen's NPI active?: Yes — Alissa Gregersen's NPI (1922508902) is active in the NPPES registry as of the last update on 2026-05-27.

Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.

Provider details

Practice location

Mailing address

Specialties & taxonomies

Profile Score

What this provider does (Medicare)

Registry dates

Frequently asked questions

Specialties & taxonomies

Frequently asked questions

Profile Score

What this provider does (Medicare)