Stephanie Marie Peyton-Aas, MD
Family Medicine Physician · Watertown, SD
Stephanie Marie Peyton-Aas, MD is a family medicine physician with a practice address in Watertown, South Dakota, and NPI 1083101869, issued on Apr 17, 2018. Check the license (South Dakota 12852, as entered in NPPES) on the South Dakota Board of Medical and Osteopathic Examiners; the Medicare figures below come from public CMS files.
- Name
- Stephanie Marie Peyton-Aas
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 12852 SD
Self-reported in NPPES; status is on the state search - Practice location
- 901 4TH St NW, Watertown, SD 57201
- Phone
- (605) 886-1565
- Enumerated
- Apr 17, 2018
- Record last updated
- Mar 28, 2022
- Medicare enrollment
- Enrolled (PECOS I20210421002779); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 601 in South Dakota → Look up another NPI →
Also registered at 901 4TH St NW
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Stephanie Marie Peyton-Aas in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersSouth Dakota Board of Medical and Osteopathic Examiners
Search for license 12852Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
20% fewer Medicare Part D claims than the average family medicine physician in 2024
2,837 Medicare Part D claims for 268 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 54 claims were for opioids.
Most prescribed
- Atorvastatin Calcium168 claims
- Levothyroxine Sodium117 claims
- Simvastatin93 claims
- Omeprazole87 claims
- Gabapentin79 claims
- Losartan Potassium79 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): 76.7 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).
Bills Medicare through one group practice
- Sanford Medical CenterSioux Falls, SD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Stephanie Marie Peyton-Aas among 601 family medicine physician records in South Dakota
Stephanie Marie Peyton-Aas, MD is one of 601 family medicine physician records with a practice address in South Dakota. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 83% of them.
- NPI issued2018 · 83% of these records are older, 14% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 65% of these records are
- Graduated2017 · median 2008 among the 393 with a school on file
- Record last updated2022 · 52% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a South Dakota practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
21 family medicine physician records list a practice address in Watertown
They are 21 of the 543 NPPES records with a practice address in Watertown, and 601 family medicine physician records in South Dakota.
All 601 in South Dakota → Every provider in Watertown → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- David Carlson, MDWatertown, SD 572011114985132
- William Devine, MDWatertown, SD 572011376522854
- Allison Geier, MDWatertown, SD 572011629290440
- Kenneth Johnson, MDWatertown, SD 572011306825864
- Gregory Larson, MDWatertown, SD 572011629036645
- Thomas Lechner, MDWatertown, SD 572011053377556
- Stacie Lenssen, MDWatertown, SD 572011215994769
- Clark Likness, MDWatertown, SD 572011760449284
Common questions
What is Stephanie Marie Peyton-Aas, MD's NPI number?
Stephanie Marie Peyton-Aas, MD's National Provider Identifier (NPI) is 1083101869, issued on Apr 17, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Stephanie Marie Peyton-Aas, MD located?
The NPPES record lists a practice address at 901 4TH St NW, Watertown, SD, 57201. Phone: (605) 886-1565. Providers update this record themselves, so call before visiting.
How can I verify Stephanie Marie Peyton-Aas, MD's license?
NPPES lists South Dakota license number 12852, as entered by the provider. Search the South Dakota Board of Medical and Osteopathic Examiners at https://www.sdbmoe.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Stephanie Marie Peyton-Aas, MD prescribe under Medicare Part D?
In 2024, Stephanie Marie Peyton-Aas, MD had 2,837 Medicare Part D claims for 268 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
What is Stephanie Marie Peyton-Aas, MD's MIPS final score?
The 2023 MIPS final score is 76.7 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.