Eliot C. Williams, MD PHD
Hematology (Internal Medicine) Physician · Madison, WI
Eliot C. Williams, MD PHD is a hematology (internal medicine) physician with a practice address in Madison, Wisconsin, and NPI 1265493175, issued on Mar 30, 2006. Check the license (Wisconsin 20949, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Eliot C. Williams
- Credential
- MD PHD
- Primary taxonomy
- Hematology (Internal Medicine) Physician 207RH0000X
- License number
- 20949 WI
Self-reported in NPPES; status is on the state search - Practice location
- 600 Highland Ave, Madison, WI 53792
- Phone
- (608) 265-1700
- Enumerated
- Mar 30, 2006
- Record last updated
- Apr 10, 2009 (not updated in 17 years: call before relying on the address or phone)
- Fax
- (608) 262-1982
- Medicare enrollment
- Enrolled (PECOS I20050125001010); accepts Medicare assignment
- Medical or professional school
- Indiana University School Of Medicine, 1976
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest hematology (internal medicine) physician records → All 18 in Wisconsin → Look up another NPI →
Also registered at 600 Highland Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Alaa Abd-ElsayedPain Medicine Physician1194967703
- Safiyya Abdulkadir, MDRheumatology Physician1093455826
- Edwin Abel, M.D.Urology Physician1083800510
Verify Eliot C. Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 20949Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
34% fewer Medicare Part D claims than the average hematology (internal medicine) physician in 2024
328 Medicare Part D claims for 46 beneficiaries, against an average of 496 among the 1,036 providers of this specialty who prescribed in Part D. Brand-name drugs were 21% of claims.
Most prescribed
- Hydroxyurea67 claims
- Mycophenolate Mofetil40 claims
- Prednisone33 claims
- Acyclovir32 claims
- Aranesp22 claims
- Promacta22 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
- University OF Wisconsin Medical Foundation IncMadison, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Eliot C. Williams among 18 hematology (internal medicine) physician records in Wisconsin
Eliot C. Williams, MD PHD is one of 18 hematology (internal medicine) physician records with a practice address in Wisconsin. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 33% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated1976 · median 1993 among the 13 with a school on file
- Record last updated2009 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology (Internal Medicine) Physician providers in Wisconsin
There are 18 hematology (internal medicine) physician records in Wisconsin.
All 18 in Wisconsin → Every provider in Madison → Hematology (Internal Medicine) Physician nationwide →
The 8 hematology (internal medicine) physician records with the nearest ZIP codes
- Danielle Atibalentja, M.D., PH.D.Madison, WI 537921952752305
- Natalie Callander, MDMadison, WI 537921649247339
- Kim Dittus, MD, PHDMadison, WI 537921154538262
- Christopher Fletcher, M.D.Madison, WI 537921114121092
- Hongtao LiuMadison, WI 537921336332345
- Deane Mosher, MDMadison, WI 537921235190695
- Bradford Schwartz, MDMadison, WI 537921982996906
- John Sheehan, MDMadison, WI 537921699736090
Common questions
What is Eliot C. Williams, MD PHD's NPI number?
Eliot C. Williams, MD PHD's National Provider Identifier (NPI) is 1265493175, issued on Mar 30, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Eliot C. Williams, MD PHD located?
The NPPES record lists a practice address at 600 Highland Ave, Madison, WI, 53792. Phone: (608) 265-1700. Providers update this record themselves, so call before visiting.
How can I verify Eliot C. Williams, MD PHD's license?
NPPES lists Wisconsin license number 20949, 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 Eliot C. Williams, MD PHD prescribe under Medicare Part D?
In 2024, Eliot C. Williams, MD PHD had 328 Medicare Part D claims for 46 beneficiaries; the average among hematology (internal medicine) physician prescribers was 496. 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.