Spencer Mason
Physician Assistant · Mission, SD
Spencer Mason is a physician assistant with a practice address in Mission, South Dakota, and NPI 1982064184, issued on Mar 1, 2016. Check the license with the South Dakota board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Spencer Mason
- Primary taxonomy
- Physician Assistant 363A00000X
- Practice location
- 161 S Main, Mission, SD 57555
- Phone
- (605) 856-2295
- Enumerated
- Mar 1, 2016
- Record last updated
- May 18, 2016 (not updated in 10 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20210106001938); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 674 in South Dakota → Look up another NPI →
Verify Spencer Mason in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich South Dakota board licenses this professionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4% more Medicare Part D claims than the average physician assistant in 2024
862 Medicare Part D claims for 130 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D.
Most prescribed
- Amlodipine Besylate61 claims
- Atorvastatin Calcium55 claims
- Lisinopril48 claims
- Cephalexin26 claims
- Omeprazole24 claims
- Trulicity22 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.
Bills Medicare through one group practice
- Ihc Health Services IncEphraim, UT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Spencer Mason among 674 physician assistant records in South Dakota
Spencer Mason is one of 674 physician assistant records with a practice address in South Dakota. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 62% of them.
- NPI issued2016 · 62% of these records are older, 35% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2016 · median 2014 among the 482 with a school on file
- Record last updated2016 · 53% 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 South Dakota practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
2 physician assistant records list a practice address in Mission
They are 2 of the 15 NPPES records with a practice address in Mission, and 674 physician assistant records in South Dakota.
All 674 in South Dakota → Every provider in Mission → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Rachele Vietor, PA-CMission, SD 575551184008682
- Wylin Baker, PA-CMartin, SD 575511841015393
- Brooklyn Behrens, PAMartin, SD 575511750001335
- Colton Bender, PAMartin, SD 575511922728500
- Courtney Carmichael, PA-CMartin, SD 575511356867238
- Brady Hicks, PA-C, ATCMartin, SD 575511821505108
- Kyrstin Reimann-Doris, PALower Brule, SD 575481952549701
- Lawrence Sluiter, PA-COnida, SD 575641790934412
Common questions
What is Spencer Mason's NPI number?
Spencer Mason's National Provider Identifier (NPI) is 1982064184, issued on Mar 1, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Spencer Mason located?
The NPPES record lists a practice address at 161 S Main, Mission, SD, 57555. Phone: (605) 856-2295. Providers update this record themselves, so call before visiting.
How can I verify Spencer Mason's license?
Search the South Dakota board that licenses this profession; the NPPES record confirms identity only.
How much does Spencer Mason prescribe under Medicare Part D?
In 2024, Spencer Mason had 862 Medicare Part D claims for 130 beneficiaries; the average among physician assistant prescribers was 830. 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.