Jennifer Elaine Williamson, M.D.
Internal Medicine Physician · Brookings, SD
Jennifer Elaine Williamson, M.D. is an internal medicine physician with a practice address in Brookings, South Dakota, and NPI 1427305721, issued on Aug 7, 2012. Check the license (South Dakota 9507, as entered in NPPES) on the South Dakota Board of Medical and Osteopathic Examiners; the Medicare figures below come from public CMS files.
- Name
- Jennifer Elaine Williamson
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 9507 SD
Self-reported in NPPES; status is on the state search - Practice location
- 400 22ND Ave, Brookings, SD 57006
- Phone
- (605) 697-9500
- Enumerated
- Aug 7, 2012
- Record last updated
- Mar 17, 2016 (not updated in 10 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20150730011002); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 247 in South Dakota → Look up another NPI →
Also registered at 400 22ND Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Jennifer Elaine Williamson 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 9507Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.1 times the Medicare Part D claims of the average internal medicine physician in 2024
9,817 Medicare Part D claims for 668 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 47 claims were for opioids.
Most prescribed
- Levothyroxine Sodium712 claims
- Losartan Potassium693 claims
- Atorvastatin Calcium562 claims
- Amlodipine Besylate324 claims
- Rosuvastatin Calcium295 claims
- Metformin Hcl279 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 MIPS final score for 2023 (Medicare payment program): 97.6 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Monument Health Rapid City Hospital IncRapid City, SD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jennifer Elaine Williamson among 247 internal medicine physician records in South Dakota
Jennifer Elaine Williamson, M.D. is one of 247 internal 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 2012, is newer than 64% of them.
- NPI issued2012 · 64% of these records are older, 34% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2006 · median 2008 among the 146 with a school on file
- Record last updated2016 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a South Dakota practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
4 internal medicine physician records list a practice address in Brookings
They are 4 of the 375 NPPES records with a practice address in Brookings, and 247 internal medicine physician records in South Dakota.
All 247 in South Dakota → Every provider in Brookings → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Daniel Cecil, MDBrookings, SD 570061700844131
- Catherine Leadabrand, MDBrookings, SD 570061043277593
- Eric Murunga, MDBrookings, SD 570061225186570
- Eloise Schrag, MDFreeman, SD 570291336110428
- David Basel, MDHarrisburg, SD 570321669451340
- Steven Joyce, M.D.Dakota Dunes, SD 570491316922875
- Susan Fanta, MDYankton, SD 570781326049313
- John Frank, MDYankton, SD 570781669473443
Common questions
What is Jennifer Elaine Williamson, M.D.'s NPI number?
Jennifer Elaine Williamson, M.D.'s National Provider Identifier (NPI) is 1427305721, issued on Aug 7, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Jennifer Elaine Williamson, M.D. located?
The NPPES record lists a practice address at 400 22ND Ave, Brookings, SD, 57006. Phone: (605) 697-9500. Providers update this record themselves, so call before visiting.
How can I verify Jennifer Elaine Williamson, M.D.'s license?
NPPES lists South Dakota license number 9507, 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 Jennifer Elaine Williamson, M.D. prescribe under Medicare Part D?
In 2024, Jennifer Elaine Williamson, M.D. had 9,817 Medicare Part D claims for 668 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Jennifer Elaine Williamson, M.D.'s MIPS final score?
The 2023 MIPS final score is 97.6 of 100. 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.