NPPES file of Aug 9, 2026

Doris Marie Williams, M.D.

Adult Medicine Physician · Chatham, IL

Doris Marie Williams, M.D. is an adult medicine physician with a practice address in Chatham, Illinois, and NPI 1891966792, issued on Mar 19, 2008. Check the license (Illinois 036-067127, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1891966792
Name
Doris Marie Williams
Credential
M.D.
Primary taxonomy
Adult Medicine Physician 207QA0505X
License numbers
036-067127 IL
036067217 IL
Self-reported in NPPES; status is on the state search
Practice location
345 N Main St, Chatham, IL 62629
Phone
(217) 483-3333
Enumerated
Mar 19, 2008
Record last updated
Oct 17, 2011 (not updated in 15 years: call before relying on the address or phone)
Fax
(217) 483-4393
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest adult medicine physician records → All 72 in Illinois → Look up another NPI →

Also registered at 345 N Main St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Catherine Crabtree, M.D.Family Medicine Physician1336168699

Verify Doris Marie Williams in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
    Search for license 036-067127    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Illinois license search

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98% fewer Medicare Part D claims than the average adult medicine physician in 2024

58 Medicare Part D claims, against an average of 3,002 among the 1,307 providers of this specialty who prescribed in Part D. Brand-name drugs were 28% of claims.

  1. Doris Williams58
  2. Specialty average3,002

Most prescribed

  1. Omeprazole15 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.

Doris Marie Williams among 72 adult medicine physician records in Illinois

Doris Marie Williams, M.D. is one of 72 adult medicine physician records with a practice address in Illinois. 56% 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, 32% newer
  • In a Medicare fileYes · 56% of these records are
  • In the CMS Doctors and Clinicians fileNo · 42% of these records are
  • Record last updated2011 · 58% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207QA0505X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Adult Medicine Physician providers in Illinois

There are 72 adult medicine physician records in Illinois.

All 72 in Illinois → Every provider in Chatham → Adult Medicine Physician nationwide →

The 8 adult medicine physician records with the nearest ZIP codes

  1. Halina Kulaga, MDSpringfield, IL 627031659407385
  2. Michael Bell, DODecature, IL 625261679633143
  3. Shantha Monippallil, M.DEffingham, IL 624011437151271
  4. Rollin Perkins, MDCarbondale, IL 629011669553681
  5. Amanda WildermanCarbondale, IL 629011659915171
  6. Sarah Tariq, DOMarion, IL 629591922348101
  7. Joel Alfeche, MDDanville, IL 618321164099966
  8. Dominador Martin, M.D.Danville, IL 618321487753778

Common questions

What is Doris Marie Williams, M.D.'s NPI number?

Doris Marie Williams, M.D.'s National Provider Identifier (NPI) is 1891966792, issued on Mar 19, 2008. An NPI identifies a provider in billing; it is not a license.

Where is Doris Marie Williams, M.D. located?

The NPPES record lists a practice address at 345 N Main St, Chatham, IL, 62629. Phone: (217) 483-3333. Providers update this record themselves, so call before visiting.

How can I verify Doris Marie Williams, M.D.'s license?

NPPES lists Illinois license number 036-067127, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Doris Marie Williams, M.D. prescribe under Medicare Part D?

In 2024, Doris Marie Williams, M.D. had 58 Medicare Part D claims; the average among adult medicine physician prescribers was 3,002. 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.