Marquetta Williamson, ARNP
NPI 1487127742 · Psychiatric/Mental Health Nurse Practitioner · Seattle, WA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marquetta Williamson, ARNP is a Psychiatric/Mental Health Nurse Practitioner provider in Seattle, WA (NPI 1487127742).
Provider details
- NPI number
- 1487127742
- Entity type
- Individual
- Primary specialty
- Psychiatric/Mental Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- ARNP
- Sex
- Female
- Sole proprietor
- No
- License
- 112714 (NE)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
7 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$238 across 3 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2019-01-09
- Last updated
- 2025-07-29
- Certified
- 2025-07-29
Frequently asked questions
- What is Marquetta Williamson's NPI number?
- Marquetta Williamson's National Provider Identifier (NPI) is 1487127742, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marquetta Williamson's specialty?
- Marquetta Williamson is listed in the NPPES registry with a primary specialty of Psychiatric/Mental Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Marquetta Williamson located?
- Marquetta Williamson's practice location on file with NPPES is 325 9th Ave, Seattle, WA 98104-2420.
- What is Marquetta Williamson's phone number?
- The practice phone number listed in the NPPES registry for Marquetta Williamson is (206) 520-5000.
- Does Marquetta Williamson accept Medicare?
- Marquetta Williamson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marquetta Williamson's NPI active?
- Yes — Marquetta Williamson's NPI (1487127742) is active in the NPPES registry as of the last update on 2025-07-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.