Marquetta Williamson, ARNP
Psychiatric/Mental Health Nurse Practitioner · Seattle, WA
Marquetta Williamson, ARNP is a psychiatric/mental health nurse practitioner with a practice address in Seattle, Washington, and NPI 1487127742, issued on Jan 9, 2019. Check the license (Washington AP61643314, as entered in NPPES) with the Washington board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Marquetta Williamson
- Credential
- ARNP
- Primary taxonomy
- Psychiatric/Mental Health Nurse Practitioner 363LP0808X
- License numbers
- AP61643314 WA
112714 NE
Self-reported in NPPES; status is on the state search - Practice location
- 325 9TH Ave, Seattle, WA 98104
- Phone
- (206) 520-5000
- Enumerated
- Jan 9, 2019
- Record last updated
- Jul 29, 2025
- Medicare enrollment
- Enrolled (PECOS I20250625003908); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest psychiatric/mental health nurse practitioner records → All 1,875 in Washington → Look up another NPI →
Also registered at 325 9TH Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Marquetta Williamson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Washington board licenses this profession
Search for license AP61643314Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $237.73
3 payments; by number, the most common kind was food and beverage; the largest payer was Vanda Pharmaceuticals Inc. The 23,362 providers of this specialty with any payment received $1,027.77 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- The Association OF University PhysiciansSeattle, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Marquetta Williamson among 1,875 psychiatric/mental health nurse practitioner records in Washington
Marquetta Williamson, ARNP is one of 1,875 psychiatric/mental health nurse practitioner records with a practice address in Washington. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 50% of them.
- NPI issued2019 · 50% of these records are older, 42% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 48% of these records are
- Graduated2019 · median 2020 among the 904 with a school on file
- Record last updated2025 · 28% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LP0808X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Psychiatric/Mental Health Nurse Practitioner providers in Washington
There are 1,875 psychiatric/mental health nurse practitioner records in Washington.
All 1,875 in Washington → Every provider in Seattle → Psychiatric/Mental Health Nurse Practitioner nationwide →
The 8 psychiatric/mental health nurse practitioner records with the nearest ZIP codes
- Catherine Bonn, ARNPSeattle, WA 981041891723722
- Kara Carthel, D.N.P.Seattle, WA 981041447628664
- Joyce Farrell, ARNPSeattle, WA 981041083646897
- Shirley Gassner, ARNPSeattle, WA 981041093953770
- Nina Geiger, ARNPSeattle, WA 981041205865326
- Meaghen Hart-Williams, APRNSeattle, WA 981041962831404
- Noel Howes, ARNPSeattle, WA 981041659390565
- Shannon LemasterSeattle, WA 981041649553645
Common questions
What is Marquetta Williamson, ARNP's NPI number?
Marquetta Williamson, ARNP's National Provider Identifier (NPI) is 1487127742, issued on Jan 9, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Marquetta Williamson, ARNP located?
The NPPES record lists a practice address at 325 9TH Ave, Seattle, WA, 98104. Phone: (206) 520-5000. Providers update this record themselves, so call before visiting.
How can I verify Marquetta Williamson, ARNP's license?
NPPES lists Washington license number AP61643314, as entered by the provider. Search the Washington board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.