Peggy J. Simpson, MD
Internal Medicine Physician · Madison, WI
Peggy J. Simpson, MD is an internal medicine physician with a practice address in Madison, Wisconsin, and NPI 1770749418, issued on Aug 1, 2008. Check the license (Wisconsin 55859-020, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Peggy J. Simpson
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 55859-020 WI
Self-reported in NPPES; status is on the state search - Practice location
- 1313 Fish Hatchery RD, Madison, WI 53715
- Phone
- (608) 252-8000
- Enumerated
- Aug 1, 2008
- Record last updated
- Dec 12, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (608) 252-8233
- Medicaid ID
- 1770749418 WI
- Medicare enrollment
- Enrolled (PECOS I20110923000334); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,078 in Wisconsin → Look up another NPI →
Also registered at 1313 Fish Hatchery RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Janice Antoniewicz-Werner, CDRegistered Dietitian1790741288
- Brian ApelPharmacist1013188069
- Gregory BartelsPharmacist1861716698
- Gretchen Batterman, PSYDClinical Neuropsychologist1285784348
- Michael Bernhard, PHDPsychologist1285678672
- Andrew Bognar, PHARMDPharmacist1508221029
Verify Peggy J. Simpson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 55859-020Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.3 times the Medicare Part D claims of the average internal medicine physician in 2024
10,470 Medicare Part D claims for 645 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. 263 claims were for opioids.
Most prescribed
- Atorvastatin Calcium745 claims
- Levothyroxine Sodium324 claims
- Omeprazole323 claims
- Amlodipine Besylate259 claims
- Lisinopril244 claims
- Rosuvastatin Calcium240 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.
Bills Medicare through one group practice
- Dean Health Systems IncMadison, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Peggy J. Simpson among 2,078 internal medicine physician records in Wisconsin
Peggy J. Simpson, MD is one of 2,078 internal medicine physician records with a practice address in Wisconsin. 70% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 60% of them.
- NPI issued2008 · 60% of these records are older, 37% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated2009 · median 2002 among the 1,098 with a school on file
- Record last updated2020 · 55% 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 Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
417 internal medicine physician records list a practice address in Madison
They are 417 of the 15,014 NPPES records with a practice address in Madison, and 2,078 internal medicine physician records in Wisconsin.
All 2,078 in Wisconsin → Every provider in Madison → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Thomas Bugliosi, M.D.Madison, WI 537151629055124
- Rebecca Byers, MDMadison, WI 537151568439248
- Tony Chang, MDMadison, WI 537151831166990
- Heather Childers-Okas, DOMadison, WI 537151093782765
- Richard Day, MDMadison, WI 537151972570653
- Elizabeth George, MDMadison, WI 537151255308409
- Jeremy Jaskunas, MDMadison, WI 537151568438414
- Frank Kilpatrick, MDMadison, WI 537151154397172
Common questions
What is Peggy J. Simpson, MD's NPI number?
Peggy J. Simpson, MD's National Provider Identifier (NPI) is 1770749418, issued on Aug 1, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Peggy J. Simpson, MD located?
The NPPES record lists a practice address at 1313 Fish Hatchery RD, Madison, WI, 53715. Phone: (608) 252-8000. Providers update this record themselves, so call before visiting.
How can I verify Peggy J. Simpson, MD's license?
NPPES lists Wisconsin license number 55859-020, as entered by the provider. Search the Wisconsin Medical Examining Board at https://dsps.wi.gov/Pages/BoardsCouncils/MEB/Default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Peggy J. Simpson, MD prescribe under Medicare Part D?
In 2024, Peggy J. Simpson, MD had 10,470 Medicare Part D claims for 645 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
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.