Peggy Simpson, MD
NPI 1770749418 · Internal Medicine Physician · Madison, WI
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Peggy Simpson, MD is a Internal Medicine Physician provider in Madison, WI (NPI 1770749418).
Provider details
- NPI number
- 1770749418
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 55859-020 (WI)
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
17 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
1,873 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) |
|---|---|---|
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 561 | $9 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 487 | $120 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 241 | $122 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test85027 | 162 | $6 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 64 | $86 |
| Admn Sarscov2 Vacc 1 Dose90480 | 55 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 163 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 745 | 196 |
| Levothyroxine Sodium | 324 | 79 |
| Omeprazole | 323 | 110 |
| Amlodipine Besylate | 259 | 77 |
| Lisinopril | 244 | 74 |
| Rosuvastatin Calcium | 240 | 75 |
| Losartan Potassium |
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-08-01
- Last updated
- 2020-12-12
- Certified
- 2020-12-12
Frequently asked questions
- What is Peggy Simpson's NPI number?
- Peggy Simpson's National Provider Identifier (NPI) is 1770749418, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Peggy Simpson's specialty?
- Peggy Simpson is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Peggy Simpson located?
- Peggy Simpson's practice location on file with NPPES is 1313 Fish Hatchery Rd, Madison, WI 53715-1911.
- What is Peggy Simpson's phone number?
- The practice phone number listed in the NPPES registry for Peggy Simpson is (608) 252-8000.
- Does Peggy Simpson accept Medicare?
- Peggy Simpson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Peggy Simpson's NPI active?
- Yes — Peggy Simpson's NPI (1770749418) is active in the NPPES registry as of the last update on 2020-12-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.