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NPISignal

Individual Healthcare Provider

John A. Greager, MD

NPI Record: ActiveSurgery
NPI1427164722
Lombard, Illinois

Provider's NPPES record last updated: October 13, 2007

Overview

Entity Type
Individual Healthcare Provider
NPI
1427164722
Primary Specialty
Surgery
Practice Location
Lombard, Illinois
Sole Proprietor
No

Federal Screening

NPISignal checked this NPI against federal exclusion sources. Results below are based on the NPI number itself — an identifier match, not a name match.

List of Excluded Individuals/Entities (LEIE)

HHS Office of Inspector General

Potential match — review required

1 potential match identified in List of Excluded Individuals/Entities (LEIE). Review required.

Source data
September 10, 2026
Records indexed
84,001
Screened
Sep 21, 2026, 11:51 AM UTC
NPI match

JOHN A II GREAGER

Why NPISignal flagged this

  • The NPI on both records is identical

The exclusion record carries the same NPI. This is the strongest signal available in the public data, and still warrants confirmation with the source before any action is taken.

The source record

Name on the exclusion record
JOHN A II GREAGER
NPI on the exclusion record
1427164722
General category
PHYSICIAN (MD, DO)
Specialty
SURGERY
Exclusion type
1128a1
Exclusion date
April 18, 2024
Excluding agency
HHS Office of Inspector General
Location on record
HINSDALE, IL, 60521
Date of birth on record
Held by the source, not shown

Confirm this record directly with the HHS-OIG exclusions database before acting on it. NPISignal matches on public identity fields and cannot verify identity using a Social Security number or employer identification number — only the issuing agency can.

SAM.gov Exclusions

U.S. General Services Administration

Not checked

SAM.gov Exclusions was not checked.

SAM.gov screening is not configured on this deployment. No SAM check has been performed.

Screened
Not checked

This is an NPI-based check only. NPISignal does not publish name-based exclusion matches on a provider profile. A shared or similar name is a lead that requires human review, not an identification, and this page is not the place to make one. Run a name-based screening below to see potential matches with the reasons for each.

This reflects only the records NPISignal currently holds and the identity information supplied. It is not a verification of eligibility, licensure, or compliance. Verify decisions that matter against the authoritative source.

Run a name-based screening

Searches OIG LEIE and SAM.gov by name and reviews every potential match.

Specialties & Taxonomies

  • Surgery

    Allopathic & Osteopathic Physicians

    Primary

    A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.

    Taxonomy code 208600000X

  • Surgery

    Surgical Oncology

    Allopathic & Osteopathic Physicians

    A surgical oncologist is a well-qualified surgeon who has obtained additional training and experience in the multidisciplinary approach to the prevention, diagnosis, treatment, and rehabilitation of cancer patients, and devotes a major portion of his or her professional practice to these activities and cancer research.

    Taxonomy code 2086X0206X

  • General Practice

    Allopathic & Osteopathic Physicians

    A physician who specializes in the general practice of diagnosing, treating, and managing patients with a variety of illnesses and conditions.

    Taxonomy code 208D00000X

Practice Locations

Practice Location

1263 S Highland Ave

Suite 100

Lombard, Illinois 60148-4516

Phone: (630) 261-0280

Record Information

Enumeration Date
August 21, 2006
Provider's NPPES Record Last Updated
October 13, 2007
NPISignal NPPES Dataset
August 2026

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