Justin James Martinson, PA-C
Medical Physician Assistant · Watertown, SD
Justin James Martinson, PA-C is a medical physician assistant with a practice address in Watertown, South Dakota, and NPI 1356673883, issued on Feb 9, 2010. Check the license with the South Dakota board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Justin James Martinson
- Credential
- PA-C
- Primary taxonomy
- Medical Physician Assistant 363AM0700X
- Practice location
- 401 9TH Ave NW, Watertown, SD 57201
- Phone
- (605) 882-7000
- Enumerated
- Feb 9, 2010
- Record last updated
- May 2, 2016 (not updated in 10 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest medical physician assistant records → All 96 in South Dakota → Look up another NPI →
Also registered at 401 9TH Ave NW
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Verify Justin James Martinson 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
95% fewer Medicare Part D claims than the average medical physician assistant in 2024
57 Medicare Part D claims for 38 beneficiaries, against an average of 1,148 among the 23,801 providers of this specialty who prescribed in Part D. 13 claims were for opioids.
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.
The practice group's MIPS final score for 2023 (Medicare payment program): 94.9 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Justin James Martinson among 96 medical physician assistant records in South Dakota
Justin James Martinson, PA-C is one of 96 medical physician assistant records with a practice address in South Dakota. 63% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 67% of them.
- NPI issued2010 · 67% of these records are older, 30% newer
- In a Medicare fileYes · 63% of these records are
- In the CMS Doctors and Clinicians fileNo · 46% of these records are
- Record last updated2016 · 67% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363AM0700X and a South Dakota practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Medical Physician Assistant providers in South Dakota
There are 96 medical physician assistant records in South Dakota.
All 96 in South Dakota → Every provider in Watertown → Medical Physician Assistant nationwide →
The 8 medical physician assistant records with the nearest ZIP codes
- David Feist, PA-CWatertown, SD 572011003243437
- Terri Groves, PA-CWatertown, SD 572011376645168
- Joyce Larson, PA-CWatertown, SD 572011710923594
- Jordana NeemanWatertown, SD 572011871971481
- Emily Lawrence, PA-CDe Smet, SD 572311366851834
- Deane Berg, P.A.-CSioux Falls, SD 571171982658001
- Sarah Engbers, PA-CSioux Falls, SD 571081154756054
- Mikaela Penaredondo, PA-CSioux Falls, SD 571081346589876
Common questions
What is Justin James Martinson, PA-C's NPI number?
Justin James Martinson, PA-C's National Provider Identifier (NPI) is 1356673883, issued on Feb 9, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Justin James Martinson, PA-C located?
The NPPES record lists a practice address at 401 9TH Ave NW, Watertown, SD, 57201. Phone: (605) 882-7000. Providers update this record themselves, so call before visiting.
How can I verify Justin James Martinson, PA-C's license?
Search the South Dakota board that licenses this profession; the NPPES record confirms identity only.
How much does Justin James Martinson, PA-C prescribe under Medicare Part D?
In 2024, Justin James Martinson, PA-C had 57 Medicare Part D claims for 38 beneficiaries; the average among medical physician assistant prescribers was 1,148. Part D covers Medicare prescriptions only.
What is Justin James Martinson, PA-C's MIPS final score?
The 2023 MIPS final score is 94.9 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.