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CHEST & SLEEP MEDICINE ASSOCIATES S.C.
NPI 1780604116
Internal Medicine - Pulmonary Disease in Libertyville, IL

Active since July 20, 2006
755 S MILWAUKEE AVE STE 181, LIBERTYVILLE, IL 60048(847) 855-2430(847) 855-2490 Get Directions Write a Review

NPPES record last updated: June 7, 2023. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Jun 7, 2023, Sep 9, 2022 (2 updates tracked since 2022).

About Chest & Sleep Medicine Associates S.c. NPPES

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

CHEST & SLEEP MEDICINE ASSOCIATES S.C. (NPI 1780604116) is a healthcare organization registered as a pulmonary disease in Libertyville, Illinois and active in the NPI registry since July 2006. The organization lists Dennis Hoffman, Owner, as its authorized official.

NPPES Registry Identity

NPI1780604116
Entity TypeOrganization
Primary Taxonomy207RP1001X
Legal Business NameCHEST & SLEEP MEDICINE ASSOCIATES S.C.
Location Address755 S MILWAUKEE AVE STE 181Libertyville, IL 60048-3267
Mailing Address755 S Milwaukee Ave Ste 181Libertyville, IL 60048-3267 · (847) 855-2430 · Fax (847) 855-2490
Phone(847) 855-2430
Fax(847) 855-2490
Organization SubpartNo
Authorized OfficialDennis HoffmanOwner · (847) 573-9031
Enumeration DateJuly 20, 2006
Last NPPES UpdateJune 7, 20232 updates tracked since enumeration
NPPES CertifiedJune 7, 2023
✔ NPI 1780604116 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Pulmonary DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RP1001X
License✔ Licensed in IL · 036085568
Definition
An internist who treats diseases of the lungs and airways. The pulmonologist diagnoses and treats cancer, pneumonia, pleurisy, asthma, occupational and environmental diseases, bronchitis, sleep disorders, emphysema and other complex disorders of the lungs.
Also ListedInternal Medicine · Critical Care MedicineTaxonomy 207RC0200X · License 036085568 (IL)
755 S MILWAUKEE AVE STE 181, Libertyville, IL 60048
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Other Identifiers 1

Other04927890IL · Blue Cross/shield

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter Health, Ambetter Health of Delaware.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Chest & Sleep Medicine Associates S.c. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

8

Medicare enrollment records show 8 clinicians reassign Medicare billing to Chest & Sleep Medicine Associates S.C., which bills Medicare for the services they deliver. Of these, 3 practice at this address. They are listed nearest first.

Clinicians, nearest first (8)

Dennis Hoffman, M.D.
Pulmonary Disease
NPI 1548250780
755 S MILWAUKEE AVE STE 181
Libertyville, IL 60048
(847) 855-2493
✔ PECOS✔ Accepts MedicareSame address
Joel Mensing, D.O.
Pulmonary Disease
NPI 1336454404
755 S MILWAUKEE AVE STE 181
Libertyville, IL 60048
(847) 855-2460
✔ PECOS✔ Accepts MedicareSame address
Celestia Nielsen, FNP
Nurse Practitioner
NPI 1093349391
755 S MILWAUKEE AVE STE 181
Libertyville, IL 60048
(847) 855-2430
✔ PECOS✔ Accepts MedicareSame address
Natalia Angelov
Nurse Practitioner
NPI 1174220388
777 PARK AVE W
Highland Park, IL 60035
(847) 480-3727
✔ PECOS✔ Accepts Medicare11 mi
Kumar Gaurav, M.D.
Pulmonary Disease
NPI 1467617902
CANCER TREATMENT CENTERS OF AMERICA 2520 ELISHA AVENUE
Zion, IL 60099
(800) 322-9183
✔ PECOS✔ Accepts Medicare12 mi
Reeja Puthenveetil, FNP-BC
Nurse Practitioner
NPI 1184492548
2340 S HIGHLAND AVE STE 230
Lombard, IL 60148
(630) 932-2040
✔ PECOS31 mi
Arushi Agrawal, MD
Pulmonary Disease
NPI 1629572177
600 S PAULINA ST
Chicago, IL 60612
(312) 942-5000
✔ PECOS✔ Accepts Medicare32 mi
Abigail Doyle, D.O.
Pulmonary Disease
NPI 1861755498
2040 OGDEN AVE STE 401
Aurora, IL 60504
(630) 499-7500
✔ PECOS✔ Accepts Medicare39 mi

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

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 Chest & Sleep Medicine Associates S.C.'s NPI number?

The NPI number for Chest & Sleep Medicine Associates S.C. is 1780604116. It was assigned to this organization in the NPPES registry on July 20, 2006.

Where is Chest & Sleep Medicine Associates S.C. located?

Chest & Sleep Medicine Associates S.C. is located at 755 S Milwaukee Ave Ste 181, Libertyville, IL 60048. The listed phone number is (847) 855-2430.

What is Chest & Sleep Medicine Associates S.C.'s specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Pulmonary Disease, with taxonomy code 207RP1001X.

Is Chest & Sleep Medicine Associates S.C. enrolled in Medicare?

Yes. Chest & Sleep Medicine Associates S.C. is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Chest & Sleep Medicine Associates S.C.?

According to the CMS Revalidation Reassignment List (October 2026 release), 8 clinicians in 2 Medicare specialties reassign their Medicare billing to Chest & Sleep Medicine Associates S.C.. A 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 the clinician's services. The largest specialties are Pulmonary Disease (5) and Nurse Practitioner (3). Of these, 3 practice at this address. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

What insurance does Chest & Sleep Medicine Associates S.C. accept?

Health plans from Ambetter Health and Ambetter Health of Delaware list Chest & Sleep Medicine Associates S.C. as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Chest & Sleep Medicine Associates S.C. was last updated on June 7, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.