Silas Willoughby, ARNP
Psychiatric/Mental Health Nurse Practitioner · Selah, WA
Silas Willoughby, ARNP is a psychiatric/mental health nurse practitioner with a practice address in Selah, Washington, and NPI 1649782814, issued on Oct 28, 2017. Check the license (Washington AP61272511, as entered in NPPES) with the Washington board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Silas Willoughby
- Credential
- ARNP
- Primary taxonomy
- Psychiatric/Mental Health Nurse Practitioner 363LP0808X
- License number
- AP61272511 WA
Self-reported in NPPES; status is on the state search - Practice location
- 609 Speyers RD, Selah, WA 98942
- Phone
- (509) 575-4084
- Enumerated
- Oct 28, 2017
- Record last updated
- Mar 18, 2024
- Entity
- Type 1 · individual
8 nearest psychiatric/mental health nurse practitioner records → All 1,875 in Washington → Look up another NPI →
Also registered at 609 Speyers RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Maranda AlcazarPsychiatric/Mental Health Registered Nurse1962263483
- Chesley ArevaloRegistered Nurse1508797606
- Kimberly AvalosPsychiatric/Mental Health Registered Nurse1013674720
- Thomas BellPsychiatric/Mental Health Nurse Practitioner1538814272
- Paul CepeRegistered Nurse1114874211
- Patricia Davis, RNRegistered Nurse1790627073
Verify Silas Willoughby in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Washington board licenses this profession
Search for license AP61272511Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
64% fewer Medicare Part D claims than the average psychiatric/mental health nurse practitioner in 2024
325 Medicare Part D claims for 38 beneficiaries, against an average of 906 among the 30,717 providers of this specialty who prescribed in Part D.
Most prescribed
- Quetiapine Fumarate31 claims
- Trazodone Hcl20 claims
- Divalproex Sodium Er19 claims
- Haloperidol19 claims
- Lorazepam17 claims
- Benztropine Mesylate13 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Silas Willoughby among 1,875 psychiatric/mental health nurse practitioner records in Washington
Silas Willoughby, 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 2017, is newer than 40% of them.
- NPI issued2017 · 40% of these records are older, 56% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileNo · 48% of these records are
- Record last updated2024 · 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).
4 psychiatric/mental health nurse practitioner records list a practice address in Selah
They are 4 of the 144 NPPES records with a practice address in Selah, and 1,875 psychiatric/mental health nurse practitioner records in Washington.
All 1,875 in Washington → Every provider in Selah → Psychiatric/Mental Health Nurse Practitioner nationwide →
The 8 psychiatric/mental health nurse practitioner records with the nearest ZIP codes
- Thomas BellSelah, WA 989421538814272
- Shirley Mohren-Graves, ARNPSelah, WA 989421568461465
- Jennifer Wilson, ARNPSelah, WA 989421972109254
- Esmeralda Anderson, ARNPSunnyside, WA 989441942844287
- Linda Hawley, PMHNPSunnyside, WA 989441871078584
- Elisabeth Dunbar, ARNPToppenish, WA 989481396031266
- Michelle GoreyToppenish, WA 989481508534363
- Maryalice Hardison, ARNPToppenish, WA 989481992256796
Common questions
What is Silas Willoughby, ARNP's NPI number?
Silas Willoughby, ARNP's National Provider Identifier (NPI) is 1649782814, issued on Oct 28, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Silas Willoughby, ARNP located?
The NPPES record lists a practice address at 609 Speyers RD, Selah, WA, 98942. Phone: (509) 575-4084. Providers update this record themselves, so call before visiting.
How can I verify Silas Willoughby, ARNP's license?
NPPES lists Washington license number AP61272511, as entered by the provider. Search the Washington board that licenses this profession; the NPPES record confirms identity only.
How much does Silas Willoughby, ARNP prescribe under Medicare Part D?
In 2024, Silas Willoughby, ARNP had 325 Medicare Part D claims for 38 beneficiaries; the average among psychiatric/mental health nurse practitioner prescribers was 906. Part D covers Medicare prescriptions 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.