NPPES file of Aug 9, 2026

Cassandra Serene Dengler, ARNP, PMHNP

Psychiatric/Mental Health Nurse Practitioner · Mount Vernon, WA

Cassandra Serene Dengler, ARNP, PMHNP is a psychiatric/mental health nurse practitioner with a practice address in Mount Vernon, Washington, and NPI 1336983105, issued on Jun 25, 2024. Check the license (Washington AP61574970, as entered in NPPES) with the Washington board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1336983105
Name
Cassandra Serene Dengler
Credential
ARNP, PMHNP
Primary taxonomy
Psychiatric/Mental Health Nurse Practitioner 363LP0808X
License number
AP61574970 WA
Self-reported in NPPES; status is on the state search
Practice location
117 N 1St St Ste 55, Mount Vernon, WA 98273
Phone
(360) 588-4950
Enumerated
Jun 25, 2024
Record last updated
Oct 23, 2024
Medicare enrollment
Enrolled (PECOS I20240725001316); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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Also registered at 117 N 1St St Ste 55

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Sandarah Abrahamson-Amun, MAMental Health Counselor1194793059
  2. Nikki Behner, A.R.N.P.Psychiatric/Mental Health Nurse Practitioner1548472244
  3. Denise MillerMental Health Counselor1043531221

Verify Cassandra Serene Dengler in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Washington board licenses this profession
    Search for license AP61574970
    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the Washington license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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82% fewer Medicare Part D claims than the average psychiatric/mental health nurse practitioner in 2024

164 Medicare Part D claims for 22 beneficiaries, against an average of 906 among the 30,717 providers of this specialty who prescribed in Part D.

  1. Cassandra Dengler164
  2. Specialty average906

Most prescribed

  1. Lamotrigine42 claims
  2. Quetiapine Fumarate18 claims
  3. Alprazolam14 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.

Industry payments in 2024: $1,236.32

38 payments; by number, the most common kind was food and beverage; the largest payer was Teva Pharmaceuticals USA, 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.

  1. Cassandra Dengler$1,236.32
  2. Specialty average$1,027.77

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

  1. Counseling Services For Wellbeing, Inc.Burien, WA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Cassandra Serene Dengler among 1,875 psychiatric/mental health nurse practitioner records in Washington

Cassandra Serene Dengler, ARNP, PMHNP 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 2024, is newer than 86% of them.

  • NPI issued2024 · 86% of these records are older, 8% newer
  • In a Medicare fileYes · 67% of these records are
  • In the CMS Doctors and Clinicians fileYes · 48% of these records are
  • Graduated2024 · median 2020 among the 904 with a school on file
  • 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).

Psychiatric/Mental Health Nurse Practitioner providers in Washington

There are 1,875 psychiatric/mental health nurse practitioner records in Washington.

The 8 psychiatric/mental health nurse practitioner records with the nearest ZIP codes

  1. Margaret Ackerman, APNMount Vernon, WA 982731972723906
  2. Nikki Behner, A.R.N.P.Mount Vernon, WA 982731548472244
  3. Ganiv Kahlon, PMHNPMount Vernon, WA 982731902796816
  4. Alison Lorenz Forbes, ARNPMount Vernon, WA 982731205090313
  5. Siri Mayo, ARNPMount Vernon, WA 982731184308900
  6. Amy Tierra, ARNP, NP-C, PMHNP-BCMount Vernon, WA 982731053658724
  7. Falyn Crosby, ARNPMount Vernon, WA 982741780437590
  8. Jasleena Grewal, ARNPMount Vernon, WA 982741982177168

Common questions

What is Cassandra Serene Dengler, ARNP, PMHNP's NPI number?

Cassandra Serene Dengler, ARNP, PMHNP's National Provider Identifier (NPI) is 1336983105, issued on Jun 25, 2024. An NPI identifies a provider in billing; it is not a license.

Where is Cassandra Serene Dengler, ARNP, PMHNP located?

The NPPES record lists a practice address at 117 N 1St St Ste 55, Mount Vernon, WA, 98273. Phone: (360) 588-4950. Providers update this record themselves, so call before visiting.

How can I verify Cassandra Serene Dengler, ARNP, PMHNP's license?

NPPES lists Washington license number AP61574970, as entered by the provider. Search the Washington board that licenses this profession; the NPPES record confirms identity only.

How much does Cassandra Serene Dengler, ARNP, PMHNP prescribe under Medicare Part D?

In 2024, Cassandra Serene Dengler, ARNP, PMHNP had 164 Medicare Part D claims for 22 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.