Gregory Larson, PA-C
Physician Assistant · Spearfish, SD
Gregory Larson, PA-C is a physician assistant with a practice address in Spearfish, South Dakota, and NPI 1134577448, issued on May 26, 2016. Check the license (South Dakota 1039, as entered in NPPES) with the South Dakota board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Gregory Larson
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- 1039 SD
Self-reported in NPPES; status is on the state search - Practice location
- 550 E Colorado Blvd, Spearfish, SD 57783
- Phone
- (605) 717-8860
- Enumerated
- May 26, 2016
- Record last updated
- May 26, 2016 (not updated in 10 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20190923002746); accepts Medicare assignment
- Medical or professional school
- Yale University School Of Medicine, 2011
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 674 in South Dakota → Look up another NPI →
Also registered at 550 E Colorado Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Wayne Anderson, MDFamily Medicine Physician1902834914
Verify Gregory Larson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich South Dakota board licenses this profession
Search for license 1039Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
38% fewer Medicare Part D claims than the average physician assistant in 2024
515 Medicare Part D claims for 273 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 18% of claims.
Most prescribed
- Triamcinolone Acetonide94 claims
- Fluorouracil59 claims
- Ketoconazole55 claims
- Doxycycline Hyclate52 claims
- Dupixent Pen37 claims
- Clobetasol Propionate36 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 82.6 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).
Industry payments in 2024: $434.80
12 payments; by number, the most common kind was food and beverage; the largest payer was Incyte Corporation. The 64,719 providers of this specialty with any payment received $841.65 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
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
- Hill Center For Dermatology, PCGolden, CO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory Larson among 674 physician assistant records in South Dakota
Gregory Larson, PA-C 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
- Graduated2011 · 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).
9 physician assistant records list a practice address in Spearfish
They are 9 of the 382 NPPES records with a practice address in Spearfish, and 674 physician assistant records in South Dakota.
All 674 in South Dakota → Every provider in Spearfish → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Wesley Broeder, PA-CSpearfish, SD 577831598952822
- Shane Gonnelly, PA-CSpearfish, SD 577831275413189
- Mark Heine, PA-CSpearfish, SD 577831366489403
- Jessica Johnson, PASpearfish, SD 577831114650033
- Dylin JohnsonSpearfish, SD 577831679413470
- Jami Kortan, PA-CSpearfish, SD 577831558316422
- Chloe McPhilamySpearfish, SD 577831336747856
- Lynette Siewert, PACSpearfish, SD 577831942313374
Common questions
What is Gregory Larson, PA-C's NPI number?
Gregory Larson, PA-C's National Provider Identifier (NPI) is 1134577448, issued on May 26, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Larson, PA-C located?
The NPPES record lists a practice address at 550 E Colorado Blvd, Spearfish, SD, 57783. Phone: (605) 717-8860. Providers update this record themselves, so call before visiting.
How can I verify Gregory Larson, PA-C's license?
NPPES lists South Dakota license number 1039, as entered by the provider. Search the South Dakota board that licenses this profession; the NPPES record confirms identity only.
How much does Gregory Larson, PA-C prescribe under Medicare Part D?
In 2024, Gregory Larson, PA-C had 515 Medicare Part D claims for 273 beneficiaries; the average among physician assistant prescribers was 830. Part D covers Medicare prescriptions only.
What is Gregory Larson, PA-C's MIPS final score?
The 2023 MIPS final score is 82.6 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.