Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

SHAIBAL MAZUMDAR M.D.
NPI 1093749566
Internal Medicine - Gastroenterology in Chicago, IL

Q: What is Shaibal Mazumdar's NPI number?

The NPI number for Shaibal Mazumdar is 1093749566. It was assigned to this individual provider in the NPPES registry on July 10, 2006.

Q: What is Shaibal Mazumdar's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Q: When was this NPI record last updated?

The NPPES record for Shaibal Mazumdar was last updated on October 22, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 days 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 July 10, 2006PECOS Enrolled

11250 S WESTERN AVE, CHICAGO, IL 60643(708) 915-3100(773) 834-6642 Get Directions Write a Review

NPPES record last updated: October 22, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Sep 16, 2026, Nov 23, 2021 (2 updates tracked since 2021).

On this page

About Shaibal Mazumdar M.d. NPPES

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

SHAIBAL MAZUMDAR M.D. (NPI 1093749566) is an individual gastroenterology provider in Chicago, Illinois, licensed in Illinois (036140216) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS and maintains a secondary practice location in Flossmoor.

NPPES Registry Identity

NPI1093749566

Entity TypeIndividualMale

Primary Taxonomy207RG0100X

Provider Legal NameSHAIBAL MAZUMDARCredential: M.D.

Location Address11250 S WESTERN AVEChicago, IL 60643-4116

Mailing Address150 Harvester Dr Ste 300Burr Ridge, IL 60527-5965

Phone(708) 915-3100

Fax(773) 834-6642

Sole ProprietorNo

Enumeration DateJuly 10, 2006

Last NPPES UpdateOctober 22, 20262 updates tracked since enumeration

NPPES CertifiedOctober 22, 2026

✔ NPI 1093749566 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians

Taxonomy Code207RG0100X

License✔ Licensed in IL · 036140216

Definition

An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.

11250 S WESTERN AVE, Chicago, IL 60643

Open in Google Maps ↗

Secondary Practice Location 1

Location 119550 Governors HwyFlossmoor, IL 60422-2125 · Phone (708) 915-3100 · Fax (708) 915-8395

Other Identifiers 2

Medicaid34047200WI

OtherP00452798WI · Rr Medicare

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Aspirus Health Plan, CareSource (Common Ground Healthcare).Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Shaibal Mazumdar M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 Shaibal Mazumdar reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Aurora Medical Group, Inc.

91 mi

Nurse Anesthetist, Certified Registered

3301 W FOREST HOME AVE
Milwaukee, WI 53215

Reassigned Medicare billing, Wisconsin enrollment
4,609 clinicians in this Medicare group

NPI 1427271378 (877) 576-3544

Aurora Advanced Healthcare, Inc.

102 mi

Family Medicine

3003 W GOOD HOPE RD
Milwaukee, WI 53209

Reassigned Medicare billing, Wisconsin enrollment
1,615 clinicians in this Medicare group

NPI 1265629133 (414) 352-3100

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 11

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.

Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43239

This procedure involves using a thin, flexible tube with a light and camera, known as an endoscope, to examine the esophagus, stomach, and upper part of the small intestine. Small tissue samples are taken for further examination to help diagnose various conditions.

36 services36 patients

Removal of polyps or growths of large bowel using an endoscope with mechanical snare 45385

This procedure involves using a thin, flexible tube called an endoscope to examine the large bowel. If any abnormal growths or polyps are found, a tool called a mechanical snare is used to remove them. This is a common method to prevent potential health issues.

33 services33 patients

Biopsy of large bowel using a flexible endoscope 45380

A biopsy of the large bowel using a flexible endoscope is a procedure where a thin, flexible tube with a camera is inserted through the rectum to examine the bowel. If abnormal tissue is found, a small sample is taken for further examination. This helps in diagnosing conditions like inflammation, polyps, or cancer.

28 services28 patients

Removal of polyps or growths of large bowel using an endoscope with mechanical snare 45385

28 services28 patients

Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes 99221

Initial hospital inpatient care refers to the first day of your stay in the hospital. This service typically includes a 30-minute check-up with a healthcare professional. They'll assess your health, discuss your condition, and plan your treatment. It's part of ensuring you receive the best possible care.

26 services26 patients

Biopsy of large bowel using a flexible endoscope 45380

19 services18 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60643 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 4

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

MIDWEST PHYSICIAN GROUP LTD

Family Medicine

11250 S WESTERN AVE
CHICAGO, IL 60643

Cook County (773) 779-7500

MRS. AMY MALONE KNIGHT PA-C

Physician Assistant

11250 S WESTERN AVE
CHICAGO, IL 60643

Cook County (773) 779-7500

MEDICINE & SURGERY SC

Internal Medicine (Gastroenterology)

11250 S WESTERN AVE
CHICAGO, IL 60643

Cook County (773) 779-7500

DR. RICHARD G. HARRIS M.D.

Internal Medicine

11250 S WESTERN AVE
CHICAGO, IL 60643

Cook County (737) 797-7500

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 Shaibal Mazumdar's NPI number?

The NPI number for Shaibal Mazumdar is 1093749566. It was assigned to this individual provider in the NPPES registry on July 10, 2006.

Where is Shaibal Mazumdar located?

Shaibal Mazumdar practices at 11250 S Western Ave, Chicago, IL 60643. The listed phone number is (708) 915-3100.

What is Shaibal Mazumdar's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is Shaibal Mazumdar enrolled in Medicare?

Yes. Shaibal Mazumdar is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Shaibal Mazumdar's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Shaibal Mazumdar reassigns Medicare benefits to 2 organizations: Aurora Medical Group, Inc. (Milwaukee, WI) and Aurora Advanced Healthcare, Inc. (Milwaukee, WI). 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 Shaibal Mazumdar's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Shaibal Mazumdar accept?

Health plans from Aspirus Health Plan and CareSource (Common Ground Healthcare) list Shaibal Mazumdar 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 Shaibal Mazumdar was last updated on October 22, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 days 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.