Jennifer Williamson, M.D.
NPI 1427305721 · Internal Medicine Physician · Brookings, SD
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jennifer Williamson, M.D. is a Internal Medicine Physician provider in Brookings, SD (NPI 1427305721).
Provider details
- NPI number
- 1427305721
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 9507 (SD)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
13 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
1,613 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 553 | $61 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 541 | $90 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 364 | $123 |
| Transitional Care Management Services for Problem of at Least Moderate Complexity99495 | 64 | $132 |
| Physician Or Allowed Practitioner Certification for Medicare-Covered Home Health Services Under a Home Health Plan of Care (patient Not Present), Including Contacts With Home Health Agency and Review of Reports of Patient Status Required By Physicians andG0180 | 20 | $51 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 131 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 712 | 166 |
| Losartan Potassium | 693 | 168 |
| Atorvastatin Calcium | 562 | 152 |
| Amlodipine Besylate | 324 | 93 |
| Rosuvastatin Calcium | 295 | 88 |
| Metformin Hcl | 279 | 77 |
| Potassium Chloride |
Practice location
Mailing address
Registry dates
- Enumerated
- 2012-08-07
- Last updated
- 2016-03-17
Frequently asked questions
- What is Jennifer Williamson's NPI number?
- Jennifer Williamson's National Provider Identifier (NPI) is 1427305721, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jennifer Williamson's specialty?
- Jennifer Williamson is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Jennifer Williamson located?
- Jennifer Williamson's practice location on file with NPPES is 400 22nd Ave, Brookings, SD 57006-2450.
- What is Jennifer Williamson's phone number?
- The practice phone number listed in the NPPES registry for Jennifer Williamson is (605) 697-9500.
- Does Jennifer Williamson accept Medicare?
- Jennifer Williamson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jennifer Williamson's NPI active?
- Yes — Jennifer Williamson's NPI (1427305721) is active in the NPPES registry as of the last update on 2016-03-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.