Cassandra Mason, RDN
Physician Assistant · Walla Walla, WA
Cassandra Mason, RDN is a physician assistant with a practice address in Walla Walla, Washington, and NPI 1760077705, issued on Mar 2, 2021. Check the license (Washington PA70072208, as entered in NPPES) with the Washington board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Cassandra Mason
- Credential
- RDN
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- PA70072208 WA
Self-reported in NPPES; status is on the state search - Practice location
- 112 Quail LN, Walla Walla, WA 99362
- Phone
- (720) 237-4895
- Enumerated
- Mar 2, 2021
- Record last updated
- Dec 11, 2025
- Medicare enrollment
- Enrolled (PECOS I20260119000835); accepts Medicare assignment
- Medical or professional school
- Loma Linda University School Of Medicine, 2025
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 3,718 in Washington → Look up another NPI →
Verify Cassandra Mason in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Washington board licenses this profession
Search for license PA70072208Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Idaho Pain Clinic PLLCSpokane, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Cassandra Mason among 3,718 physician assistant records in Washington
Cassandra Mason, RDN is one of 3,718 physician assistant records with a practice address in Washington. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 77% of them.
- NPI issued2021 · 77% of these records are older, 17% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2025 · median 2017 among the 2,460 with a school on file
- Record last updated2025 · 48% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
28 physician assistant records list a practice address in Walla Walla
They are 28 of the 1,276 NPPES records with a practice address in Walla Walla, and 3,718 physician assistant records in Washington.
All 3,718 in Washington → Every provider in Walla Walla → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Kenneth Busby, B.S. / B.A.Walla Walla, WA 993621508830423
- Mark Coram, PA-CWalla Walla, WA 993621407184021
- Matthew Dempster Summers, PA-CWalla Walla, WA 993621548527765
- James Hansen, PA CWalla Walla, WA 993621861504243
- Jennifer MeyersWalla Walla, WA 993621588093280
- Kenneth Moore, PA CWalla Walla, WA 993621013023407
- Lisa Must, PA-CWalla Walla, WA 993621578867842
- Jo Ella Phillips, PA-CWalla Walla, WA 993621942545710
Common questions
What is Cassandra Mason, RDN's NPI number?
Cassandra Mason, RDN's National Provider Identifier (NPI) is 1760077705, issued on Mar 2, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Cassandra Mason, RDN located?
The NPPES record lists a practice address at 112 Quail LN, Walla Walla, WA, 99362. Phone: (720) 237-4895. Providers update this record themselves, so call before visiting.
How can I verify Cassandra Mason, RDN's license?
NPPES lists Washington license number PA70072208, 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.