NPPES file of Aug 9, 2026

Landon James Williamson, DNAP

Certified Registered Nurse Anesthetist · Prosser, WA

Landon James Williamson, DNAP is a certified registered nurse anesthetist with a practice address in Prosser, Washington, and NPI 1326830043, issued on May 19, 2025. Check the license (Washington AP61682957, 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 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1326830043
Name
Landon James Williamson
Credential
DNAP
Primary taxonomy
Certified Registered Nurse Anesthetist 367500000X
License number
AP61682957 WA
Self-reported in NPPES; status is on the state search
Practice location
200 Prosser Health Dr, Prosser, WA 99350
Phone
(509) 786-2222
Enumerated
May 19, 2025
Record last updated
May 26, 2025
Medicare enrollment
Enrolled (PECOS I20250618004076); 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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8 nearest certified registered nurse anesthetist records → All 1,181 in Washington → Look up another NPI →

Also registered at 200 Prosser Health Dr

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

  1. Abigail CarsonCertified Registered Nurse Anesthetist1225901101
  2. Kelly Clarke, MA CCC-SLPSpeech-Language Pathologist1710780499
  3. Yazmin MendozaRegistered Nurse1932046455
  4. Abigale OliveRegistered Nurse1881539385
  5. Ashley OlsonRegistered Nurse1689511990
  6. Andrea Padilla, OTR/LOccupational Therapist1679280705

Verify Landon James Williamson 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 AP61682957    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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Bills Medicare through one group practice

  1. Prosser Public Hospital District OF Benton CountyProsser, WA

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

Landon James Williamson among 1,181 certified registered nurse anesthetist records in Washington

Landon James Williamson, DNAP is one of 1,181 certified registered nurse anesthetist records with a practice address in Washington. 72% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2025, is newer than 97% of them.

  • NPI issued2025 · 97% of these records are older, 1% newer
  • In a Medicare fileYes · 72% of these records are
  • In the CMS Doctors and Clinicians fileYes · 69% of these records are
  • Graduated2025 · median 2014 among the 816 with a school on file
  • Record last updated2025 · 58% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 367500000X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

6 certified registered nurse anesthetist records list a practice address in Prosser

They are 6 of the 190 NPPES records with a practice address in Prosser, and 1,181 certified registered nurse anesthetist records in Washington.

All 1,181 in Washington → Every provider in Prosser → Certified Registered Nurse Anesthetist nationwide →

The 8 certified registered nurse anesthetist records with the nearest ZIP codes

  1. Kyle Carlson, DNP, CRNAProsser, WA 993501275312357
  2. Abigail CarsonProsser, WA 993501225901101
  3. Kevin Gurney, CRNAProsser, WA 993501104037696
  4. Benjamin PasseyProsser, WA 993501134830870
  5. Alan Steen, CRNAProsser, WA 993501669417614
  6. Jason AndersonRichland, WA 993521154829992
  7. Hannah Burgett, CRNARichland, WA 993521659744498
  8. Marina Cuk, DNP/CRNARichland, WA 993521669946703

Common questions

What is Landon James Williamson, DNAP's NPI number?

Landon James Williamson, DNAP's National Provider Identifier (NPI) is 1326830043, issued on May 19, 2025. An NPI identifies a provider in billing; it is not a license.

Where is Landon James Williamson, DNAP located?

The NPPES record lists a practice address at 200 Prosser Health Dr, Prosser, WA, 99350. Phone: (509) 786-2222. Providers update this record themselves, so call before visiting.

How can I verify Landon James Williamson, DNAP's license?

NPPES lists Washington license number AP61682957, 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.