HASSAN G AZAR MD
NPI 1538504493
Internal Medicine - Pulmonary Disease in Olympia Fields, IL

Q: What is Hassan Azar's NPI number?

The NPI number for Hassan Azar is 1538504493. It was assigned to this individual provider in the NPPES registry on May 6, 2013.

Q: What is Hassan Azar's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Hassan Azar was last updated on November 22, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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 May 06, 2013PECOS EnrolledAccepts Medicare Assignment

3800 W 203RD ST, SUITE 202, OLYMPIA FIELDS, IL 60461(708) 679-2661(708) 503-3860 Get Directions Write a Review

NPPES record last updated: November 22, 2023. Verified against the NPPES registry weekly; last sync: November 08, 2026.

Record update history: Nov 22, 2023, Nov 23, 2015 (2 updates tracked since 2015).

On this page

About Hassan G Azar Md NPPES

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

HASSAN G AZAR MD (NPI 1538504493) is an individual pulmonary disease provider in Olympia Fields, Illinois, licensed in Illinois (036.087480) and active in the NPI registry since May 2013. He is enrolled in Medicare PECOS, is affiliated with John H Stroger Jr Hospital, and is a graduate of Other (1986).

NPPES Registry Identity

NPI1538504493

Entity TypeIndividualMale

Primary Taxonomy207RP1001X

Provider Legal NameHASSAN G AZARCredential: MD

Location Address3800 W 203RD ST, SUITE 202Olympia Fields, IL 60461-1184

Mailing Address15538 Lakeside DrOrland Park, IL 60467-4595 · (708) 340-8147

Phone(708) 679-2661

Fax(708) 503-3860

Sole ProprietorYes

Medical School CMSOtherGraduated 1986

Enumeration DateMay 6, 2013

Last NPPES UpdateNovember 22, 20232 updates tracked since enumeration

NPPES CertifiedNovember 22, 2023

✔ NPI 1538504493 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 · 036.087480

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 036.087480 (IL)

3800 W 203RD ST, Olympia Fields, IL 60461

Open in Google Maps ↗

Other Identifiers 1

OtherF400101250IL · Medicare Ptan

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

Hassan G Azar Md 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 ID6204803018

PECOS Enrollment IDI20131111000201

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 Hassan Azar reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Cook County

5.8 mi

General Acute Care Hospital

15900 SOUTH CICERO AVENUE
Oak Forest, IL 60452

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

NPI 1689739716 (708) 633-3400

Critical Care Physicians Of Illinois LLC

32 mi

Critical Care Medicine

2000 OGDEN AVE
Aurora, IL 60504

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

NPI 1508134966 (847) 618-1000

Rockford Health Physicians

85 mi

Multi-Specialty

8201 E RIVERSIDE BLVD
Rockford, IL 61114

Reassigned Medicare billing, Illinois enrollment
1,375 clinicians in this Medicare group

NPI 1043242886 (608) 314-2428

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 4

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.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

66 services37 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

19 services13 patients

Critical care, first 30-74 minutes 99291

Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.

18 services12 patients

Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222

Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.

16 services16 patients

Hospital Affiliations CMS Care Compare 2

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

John H Stroger Jr Hospital

Acute Care Hospitals · Chicago, IL

2/5 CMS rating

OwnershipGovernment - Local

CMS Certification Number140124

Location1901 W Harrison StChicago, IL 60612 · Cook County

Emergency services Birthing friendly

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 60461 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

$138.86 typical visit price

range $60.08 – $183.39

Typical copayment $34.71 (range $15.02 – $45.84)

Most-billed visit code 99204

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 15

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

CLARISSA JONES ACNP

Nurse Practitioner (Acute Care)

3800 W 203RD ST, SUITE 204
OLYMPIA FIELDS, IL 60461

Cook County (708) 679-2670

PANKAJ JAIN M.D.

Internal Medicine (Pulmonary Disease)

3800 W 203RD ST, SUITE 202
OLYMPIA FIELDS, IL 60461

Cook County (708) 679-2660

MS. BARBARA ZENG KWASNY NP-C

Nurse Practitioner (Family)

3800 W 203RD ST
OLYMPIA FIELDS, IL 60461

Cook County (708) 679-2035

ST JAMES HOSPITAL UNITED STATES CATHOLIC CONFERENCE

Internal Medicine (Infectious Disease)

3800 W 203RD ST, SUITE 202
OLYMPIA FIELDS, IL 60461

Cook County (708) 679-2010

HASSAN KIESO

Internal Medicine (Cardiovascular Disease)

3800 W 203RD ST, SUITE 204
OLYMPIA FIELDS, IL 60461

Cook County (708) 679-2670

LAWRENCE U HASPEL DO

Internal Medicine (Cardiovascular Disease)

3800 W 203RD ST, STE 202
OLYMPIA FIELDS, IL 60461

Cook County (708) 747-0461

BAMPEN CHARO MD

Internal Medicine (Pulmonary Disease)

3800 W 203RD ST, STE 202
OLYMPIA FIELDS, IL 60461

Cook County (708) 679-2660

MRS. STEPHANIE WARD APRN

Nurse Practitioner (Family)

3800 W 203RD ST
OLYMPIA FIELDS, IL 60461

Cook County (708) 852-2634

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 Hassan Azar's NPI number?

The NPI number for Hassan Azar is 1538504493. It was assigned to this individual provider in the NPPES registry on May 6, 2013.

Where is Hassan Azar located?

Hassan Azar practices at 3800 W 203rd St Suite 202, Olympia Fields, IL 60461. The listed phone number is (708) 679-2661.

What is Hassan Azar's specialty?

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

Is Hassan Azar enrolled in Medicare?

Yes. Hassan Azar 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 Hassan Azar's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Hassan Azar reassigns Medicare benefits to 3 organizations: Cook County (Oak Forest, IL), Critical Care Physicians Of Illinois LLC (Aurora, IL) and Rockford Health Physicians (Rockford, 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 Hassan Azar's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Hassan Azar affiliated with any hospitals?

According to CMS data, Hassan Azar is affiliated with John H Stroger Jr Hospital and Provident Hospital Of Chicago.

When was this NPI record last updated?

The NPPES record for Hassan Azar was last updated on November 22, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.