WILLIAM WALSH M.D.
NPI 1659355972
Emergency Medicine - Emergency Medical Services in Evergreen Park, IL

Q: What is William Walsh's NPI number?

The NPI number for William Walsh is 1659355972. It was assigned to this individual provider in the NPPES registry on November 30, 2005.

Q: What is William Walsh's specialty?

The primary specialty registered for this NPI is Emergency Medicine, specializing in Emergency Medical Services, with taxonomy code 207PE0004X.

Q: When was this NPI record last updated?

The NPPES record for William Walsh was last updated on February 12, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since November 30, 2005PECOS EnrolledAccepts Medicare Assignment

2800 W 95TH ST, EVERGREEN PARK, IL 60805(708) 422-4221(708) 422-4415 Get Directions Write a Review

NPPES record last updated: February 12, 2018. Verified against the NPPES registry weekly; last sync: October 25, 2026.

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About William Walsh M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

WILLIAM WALSH M.D. (NPI 1659355972) is an individual emergency medical services provider in Evergreen Park, Illinois, licensed in Illinois (036103168) and active in the NPI registry since November 2005. He is enrolled in Medicare PECOS, is affiliated with Provident Hospital Of Chicago, and is a graduate of Other (1998).

NPPES Registry Identity

NPI1659355972

Entity TypeIndividualMale

Primary Taxonomy207PE0004X

Provider Legal NameWILLIAM WALSHCredential: M.D.

Location Address2800 W 95TH STEvergreen Park, IL 60805-2746

Mailing Address2800 W 95th StEvergreen Park, IL 60805-2701 · (708) 229-5365

Phone(708) 422-4221

Fax(708) 422-4415

Sole ProprietorNo

Medical School CMSOtherGraduated 1998

Enumeration DateNovember 30, 2005

Last NPPES UpdateFebruary 12, 2018

✔ NPI 1659355972 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyEmergency Medicine · Emergency Medical ServicesAllopathic & Osteopathic Physicians

Taxonomy Code207PE0004X

License✔ Licensed in IL · 036103168

Definition

An emergency medicine physician who specializes in non-hospital based emergency medical services (e.g., disaster site, accident scene, transport vehicle, etc.) to provide pre-hospital assessment, treatment, and transport patients.

Also ListedEmergency MedicineTaxonomy 207P00000X · License 036103168 (IL)

2800 W 95TH ST, Evergreen Park, IL 60805

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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

William Walsh M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID6406808716

PECOS Enrollment IDI20050215000678

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show William Walsh reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Osf Healthcare System

Same address

General Acute Care Hospital

2800 W 95TH ST
Evergreen Park, IL 60805

Reassigned Medicare billing, Illinois enrollment
183 clinicians in this Medicare group

NPI 1215572045 (708) 422-6200

Cook County

3.8 mi

Primary Care

1135 W 69TH ST
Chicago, IL 60621

Reassigned Medicare billing, Illinois enrollment
1,047 clinicians in this Medicare group

NPI 1295855096 (773) 483-5011

Osf Multi-Specialty Group

121 mi

Internal Medicine

8600 N STATE ROUTE 91
Peoria, IL 61615

Reassigned Medicare billing, Illinois enrollment
2,944 clinicians in this Medicare group

NPI 1154908929 (309) 683-5050

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 3

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Emergency department visit with moderate level of medical decision making 99284

An emergency department visit for a high-severity issue means you're experiencing a serious health problem that needs immediate attention. This could be a severe injury, serious illness, or life-threatening condition. Medical professionals will provide urgent care to stabilize your condition.

30 services30 patients

Emergency department visit with low level of medical decision making 99283

An emergency department visit for a problem of moderate severity involves immediate medical attention for issues like minor fractures, burns, or high fever. The healthcare team will assess your condition, provide necessary treatment, and may suggest further tests or admission if required.

20 services19 patients

Emergency department visit with high level of medical decision making 99285

An emergency department visit for severe conditions is when you urgently seek medical help due to serious health issues. These could be severe injuries, breathing problems, unbearable pain, or sudden severe illness. Doctors and nurses will provide immediate care to stabilize your condition.

16 services16 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Provident Hospital Of Chicago

Acute Care Hospitals · Chicago, IL

OwnershipGovernment - Local

CMS Certification Number140300

Location500 E 51st StChicago, IL 60615 · Cook County

Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60805 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$94.06 typical visit price

range $60.08 – $183.39

Typical copayment $23.51 (range $15.02 – $45.84)

Most-billed visit code 99203

Established Patient

$105.70 typical visit price

range $18.97 – $148.12

Typical copayment $26.42 (range $4.74 – $37.03)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DEBORAH OLUBUKUNOLA OYELOWO

Nurse Practitioner (Family)

2800 W 95TH ST
EVERGREEN PK, IL 60805

Cook County (708) 422-6200

TIMOTHY D PUTNAM M.D.

Physical Medicine & Rehabilitation

2800 W 95TH ST
EVERGREEN PARK, IL 60805

Cook County (708) 422-6200

MS. KARYN L. BENAK CRNA

Nurse Anesthetist, Certified Registered

2800 W 95TH ST
EVERGREEN PARK, IL 60805

Cook County (708) 422-6200

MR. MERRILL BARNES MD

Pathology (Anatomic Pathology & Clinical Pathology)

2800 W 95TH ST
EVERGREEN PARK, IL 60805

Cook County (708) 229-5817

DANIELLE PEYTON BREWER

Pediatrics

2800 W 95TH ST
EVERGREEN PARK, IL 60805

Cook County (708) 422-6200

DR. RICHARD D. KERN M.D.

Internal Medicine (Pulmonary Disease)

2800 W 95TH ST, PULMONARY MEDICINE CONSULTANTS, LTD.
EVERGREEN PARK, IL 60805

Cook County (708) 424-9288

JOANNE ZITTER OTR

Occupational Therapist

2800 W 95TH ST
EVERGREEN PARK, IL 60805

Cook County (708) 229-5645

MELODIE KESHANI DO

Emergency Medicine

2800 W 95TH ST
EVERGREEN PARK, IL 60805

Cook County (708) 422-6200

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is William Walsh's NPI number?

The NPI number for William Walsh is 1659355972. It was assigned to this individual provider in the NPPES registry on November 30, 2005.

Where is William Walsh located?

William Walsh practices at 2800 W 95th St, Evergreen Park, IL 60805. The listed phone number is (708) 422-4221.

What is William Walsh's specialty?

The primary specialty registered for this NPI is Emergency Medicine, specializing in Emergency Medical Services, with taxonomy code 207PE0004X.

Is William Walsh enrolled in Medicare?

Yes. William Walsh is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for William Walsh's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Walsh reassigns Medicare benefits to 3 organizations: Osf Healthcare System (Evergreen Park, IL), Cook County (Chicago, IL) and Osf Multi-Specialty Group (Peoria, IL). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for William Walsh's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is William Walsh affiliated with any hospitals?

According to CMS data, William Walsh is affiliated with Provident Hospital Of Chicago.

When was this NPI record last updated?

The NPPES record for William Walsh was last updated on February 12, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.