What is Allison Shaffer's NPI number?

Allison Shaffer's National Provider Identifier (NPI) is 1821684457, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Allison Shaffer's specialty?

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

Where is Allison Shaffer located?

Allison Shaffer's practice location on file with NPPES is 17 Bishop St, Portland, ME 04103-2659.

What is Allison Shaffer's phone number?

The practice phone number listed in the NPPES registry for Allison Shaffer is (207) 203-7933.

Does Allison Shaffer accept Medicare?

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

Is Allison Shaffer's NPI active?

Yes — Allison Shaffer's NPI (1821684457) is active in the NPPES registry as of the last update on 2025-09-05.

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Allison Shaffer

NPI 1821684457 · Nurse Practitioner · Portland, ME

Allison Shaffer is a Nurse Practitioner provider in Portland, ME (NPI 1821684457).

Provider details

NPI number: 1821684457
Entity type: Individual
Primary specialty: Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
Sex: Female
Sole proprietor: No
License: CNP251331 (ME)

Practice location

17 Bishop St

Portland, ME 04103-2659

Phone: (207) 203-7933

Street-level locationGet directions

More ME providers

Mailing address

80 Mussey St

South Portland, ME 04106-2009

Specialties & taxonomies

Nurse PractitionerPrimary363L00000XLicense CNP251331 (ME)
Physician Assistants & Advanced Practice Nursing Providers
Registered Nurse163W00000XLicense RN72170 (ME)
Nursing Service Providers

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

Profile Score

Established profile(64/100 index)

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

Registry tenure38% of score
5 yrs in NPPES registry
Profile completeness38% of score
100% of core fields populated
Practice footprint23% of score
1 documented practice location

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.

Enumerated: 2020-12-17
Last updated: 2025-09-05
Certified: 2025-09-05

Frequently asked questions

What is Allison Shaffer's NPI number?: Allison Shaffer's National Provider Identifier (NPI) is 1821684457, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is Allison Shaffer's specialty?: Allison Shaffer is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
Where is Allison Shaffer located?: Allison Shaffer's practice location on file with NPPES is 17 Bishop St, Portland, ME 04103-2659.
What is Allison Shaffer's phone number?: The practice phone number listed in the NPPES registry for Allison Shaffer is (207) 203-7933.
Does Allison Shaffer accept Medicare?: Allison Shaffer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
Is Allison Shaffer's NPI active?: Yes — Allison Shaffer's NPI (1821684457) is active in the NPPES registry as of the last update on 2025-09-05.

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

Registry dates

Frequently asked questions

Specialties & taxonomies

Profile Score

Frequently asked questions