NPPES file of Aug 9, 2026

James S. Williams

Acute Care Nurse Practitioner · Westmont, IL

James S. Williams is an acute care nurse practitioner with a practice address in Westmont, Illinois, and NPI 1881569978, issued on Oct 8, 2025. Check the license (Illinois 209.033487, as entered in NPPES) with the Illinois board that licenses this profession; the Medicare figures below come from public CMS files.

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

NPPES recordNPPES file of Aug 9, 2026
1881569978
Name
James S. Williams
Primary taxonomy
Acute Care Nurse Practitioner 363LA2100X
License number
209.033487 IL
Self-reported in NPPES; status is on the state search
Practice location
700 E Ogden Ave Ste 202, Westmont, IL 60559
Phone
(630) 789-9785
Enumerated
Oct 8, 2025
Record last updated
May 5, 2026
Medicare enrollment
Enrolled (PECOS I20260408001884); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest acute care nurse practitioner records → All 639 in Illinois → Look up another NPI →

Also registered at 700 E Ogden Ave Ste 202

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

  1. Michael Ahart, APNAcute Care Nurse Practitioner1346750767
  2. Magic Allen, AGACNP-BCAcute Care Nurse Practitioner1376080630
  3. Lazaro Anguiano Munoz, FNP-CCritical Care Medicine Nurse Practitioner1407608086
  4. Erum Arain, M.D.Pulmonary Disease Physician1134462377
  5. Imtiaz Arain, MDPulmonary Disease Physician1922113976
  6. Darrell ArevaloFamily Nurse Practitioner1417444373

Verify James S. Williams in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Illinois board licenses this profession
    Search for license 209.033487    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
Find the Illinois license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through one group practice

  1. Suburban Pulmonary And Sleep Associates LtdHinsdale, IL

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

James S. Williams among 639 acute care nurse practitioner records in Illinois

James S. Williams is one of 639 acute care nurse practitioner records with a practice address in Illinois. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2025, is newer than 91% of them.

  • NPI issued2025 · 91% of these records are older, 4% newer
  • In a Medicare fileYes · 79% of these records are
  • In the CMS Doctors and Clinicians fileYes · 68% of these records are
  • Graduated2025 · median 2017 among the 434 with a school on file
  • Record last updated2026 · 45% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LA2100X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Acute Care Nurse Practitioner providers in Illinois

There are 639 acute care nurse practitioner records in Illinois.

All 639 in Illinois → Every provider in Westmont → Acute Care Nurse Practitioner nationwide →

The 8 acute care nurse practitioner records with the nearest ZIP codes

  1. Michael Ahart, APNWestmont, IL 605591346750767
  2. Magic Allen, AGACNP-BCWestmont, IL 605591376080630
  3. Jennifer CavettWestmont, IL 605591912450941
  4. Lauren Niemeyer, FNPYorkville, IL 605601841720893
  5. Teddy Enoh, MDPlano, IL 605451114484185
  6. Abigail Bingham, APRNNaperville, IL 605401548752843
  7. Kimberly Clohecy, NPNaperville, IL 605401386655579
  8. Christine Doyle, APNNaperville, IL 605401811258460

Common questions

What is James S. Williams's NPI number?

James S. Williams's National Provider Identifier (NPI) is 1881569978, issued on Oct 8, 2025. An NPI identifies a provider in billing; it is not a license.

Where is James S. Williams located?

The NPPES record lists a practice address at 700 E Ogden Ave Ste 202, Westmont, IL, 60559. Phone: (630) 789-9785. Providers update this record themselves, so call before visiting.

How can I verify James S. Williams's license?

NPPES lists Illinois license number 209.033487, as entered by the provider. Search the Illinois board that licenses this profession; the NPPES record confirms identity 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.