Allison Pierson
NPI 1922806157 · Family Nurse Practitioner · Guerneville, CA
Enrolled with Medicare as Order and Referring Only - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Allison Pierson is a Family Nurse Practitioner provider in Guerneville, CA (NPI 1922806157).
Provider details
- NPI number
- 1922806157
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Sole proprietor
- No
- License
- 95033850 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
1 yr 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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2025-03-04
- Last updated
- 2025-03-04
- Certified
- 2025-03-04
Frequently asked questions
- What is Allison Pierson's NPI number?
- Allison Pierson's National Provider Identifier (NPI) is 1922806157, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Allison Pierson's specialty?
- Allison Pierson is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Allison Pierson located?
- Allison Pierson's practice location on file with NPPES is 16387 First St, Guerneville, CA 95446-8817.
- What is Allison Pierson's phone number?
- The practice phone number listed in the NPPES registry for Allison Pierson is (707) 869-2849.
- Does Allison Pierson accept Medicare?
- Allison Pierson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Allison Pierson's NPI active?
- Yes — Allison Pierson's NPI (1922806157) is active in the NPPES registry as of the last update on 2025-03-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.