NPPES file of Aug 9, 2026

William Walsh, M.D.

Emergency Medical Services (Emergency Medicine) Physician · Evergreen Park, IL

William Walsh, M.D. is an emergency medical services (emergency medicine) physician with a practice address in Evergreen Park, Illinois, and NPI 1659355972, issued on Nov 30, 2005. Check the license (Illinois 036103168, 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
1659355972
Name
William Walsh
Credential
M.D.
Primary taxonomy
Emergency Medical Services (Emergency Medicine) Physician 207PE0004X
License number
036103168 IL
Self-reported in NPPES; status is on the state search
Practice location
2800 W 95TH St, Evergreen Park, IL 60805
Phone
(708) 422-4221
Enumerated
Nov 30, 2005
Record last updated
Feb 12, 2018 (not updated in 8 years: call before relying on the address or phone)
Fax
(708) 422-4415
Medicare enrollment
Enrolled (PECOS I20050215000678); 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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Also registered at 2800 W 95TH St

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

  1. Vincent Adduci, CRNACertified Registered Nurse Anesthetist1790915890
  2. Mary Alberts, FNPFamily Nurse Practitioner1548041544
  3. Sunil Arora, M.D.Emergency Medicine Physician1609018217
  4. M.bassel Atassi, M.D.Hematology & Oncology Physician1689876328
  5. Merrill Barnes, MDAnatomic Pathology & Clinical Pathology Physician1033738034
  6. Maria Bayas, NPAcute Care Nurse Practitioner1972740660

Verify William Walsh 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 036103168
    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

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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31% fewer Medicare Part D claims than the average emergency medical services (emergency medicine) physician in 2024

201 Medicare Part D claims for 74 beneficiaries, against an average of 292 among the 1,653 providers of this specialty who prescribed in Part D. 14 claims were for opioids.

  1. William Walsh201
  2. Specialty average292

Most prescribed

  1. Prednisone24 claims
  2. Olanzapine19 claims
  3. Benztropine Mesylate13 claims
  4. Albuterol Sulfate Hfa12 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

  1. Cook CountyChicago, IL

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

William Walsh among 117 emergency medical services (emergency medicine) physician records in Illinois

William Walsh, M.D. is one of 117 emergency medical services (emergency medicine) physician records with a practice address in Illinois. 53% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.

  • NPI issued2005 · 0% of these records are older, 76% newer
  • In a Medicare fileYes · 53% of these records are
  • In the CMS Doctors and Clinicians fileYes · 37% of these records are
  • Graduated1998 · median 1996 among the 42 with a school on file
  • Record last updated2018 · 75% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207PE0004X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

9 emergency medical services (emergency medicine) physician records list a practice address in Evergreen Park

They are 9 of the 603 NPPES records with a practice address in Evergreen Park, and 117 emergency medical services (emergency medicine) physician records in Illinois.

The 8 emergency medical services (emergency medicine) physician records with the nearest ZIP codes

  1. James Danziger, M.D.Evergreen Park, IL 608051427032838
  2. Joe Eggebeen, M.D.Evergreen Park, IL 608051821071374
  3. Ronald Holt, M.D.Evergreen Park, IL 608051295718781
  4. Leland Lenahan, M.D.Evergreen Park, IL 608051770567117
  5. Berry Lewis, M.D.Evergreen Park, IL 608051669456729
  6. Richard Lopez, M.D.Evergreen Park, IL 608051801870977
  7. Daniel Philipsborn, M.D.Evergreen Park, IL 608051962486035
  8. Francisco Rosales, M.D.Evergreen Park, IL 608051285618660

Common questions

What is William Walsh, M.D.'s NPI number?

William Walsh, M.D.'s National Provider Identifier (NPI) is 1659355972, issued on Nov 30, 2005. An NPI identifies a provider in billing; it is not a license.

Where is William Walsh, M.D. located?

The NPPES record lists a practice address at 2800 W 95TH St, Evergreen Park, IL, 60805. Phone: (708) 422-4221. Providers update this record themselves, so call before visiting.

How can I verify William Walsh, M.D.'s license?

NPPES lists Illinois license number 036103168, 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 William Walsh, M.D. prescribe under Medicare Part D?

In 2024, William Walsh, M.D. had 201 Medicare Part D claims for 74 beneficiaries; the average among emergency medical services (emergency medicine) physician prescribers was 292. 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.