Sacha K. Thomas, M.D.
Internal Medicine Physician · Madison, WI
Sacha K. Thomas, M.D. is an internal medicine physician with a practice address in Madison, Wisconsin, and NPI 1851520837, issued on Jul 10, 2009. Check the license (Wisconsin 56218-020, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Sacha K. Thomas
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 56218-020 WI
Self-reported in NPPES; status is on the state search - Practice location
- 700 S Park St, Madison, WI 53715
- Phone
- (608) 251-6100
- Enumerated
- Jul 10, 2009
- Record last updated
- Dec 17, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (608) 258-6259
- Medicare enrollment
- Enrolled (PECOS I20150105000730); accepts Medicare assignment
- Medical or professional school
- Washington University School Of Medicine, 2009
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,078 in Wisconsin → Look up another NPI →
Also registered at 700 S Park St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Shane Allen, M.D.Emergency Medicine Physician1649478231
Verify Sacha K. Thomas in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 56218-020Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average internal medicine physician in 2024
127 Medicare Part D claims for 43 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 17% of 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
- King County Public Hospital District NO 2Kirkland, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sacha K. Thomas among 2,078 internal medicine physician records in Wisconsin
Sacha K. Thomas, M.D. 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 2009, is newer than 63% of them.
- NPI issued2009 · 63% of these records are older, 35% 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 updated2012 · 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 Sacha K. Thomas, M.D.'s NPI number?
Sacha K. Thomas, M.D.'s National Provider Identifier (NPI) is 1851520837, issued on Jul 10, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Sacha K. Thomas, M.D. located?
The NPPES record lists a practice address at 700 S Park St, Madison, WI, 53715. Phone: (608) 251-6100. Providers update this record themselves, so call before visiting.
How can I verify Sacha K. Thomas, M.D.'s license?
NPPES lists Wisconsin license number 56218-020, 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 Sacha K. Thomas, M.D. prescribe under Medicare Part D?
In 2024, Sacha K. Thomas, M.D. had 127 Medicare Part D claims for 43 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.