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GASTROENTEROLOGY SERVICES, LTD
NPI 1205966678
Internal Medicine - Gastroenterology in Downers Grove, IL

Active since March 06, 2007
3825 HIGHLAND AVE, SUITE 203, DOWNERS GROVE, IL 60515(630) 969-1167(630) 969-1297 Get Directions Write a Review

NPPES record last updated: April 28, 2008. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Gastroenterology Services, Ltd NPPES

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

GASTROENTEROLOGY SERVICES, LTD (NPI 1205966678) is a healthcare organization registered as a gastroenterology in Downers Grove, Illinois and active in the NPI registry since March 2007. The organization lists David P Gerard, Co-owner, as its authorized official.

NPPES Registry Identity

NPI1205966678
Entity TypeOrganization
Primary Taxonomy207RG0100X
Legal Business NameGASTROENTEROLOGY SERVICES, LTD
Location Address3825 HIGHLAND AVE, SUITE 203Downers Grove, IL 60515-1552
Mailing Address3825 Highland Ave, Suite 203Downers Grove, IL 60515-1552 · (630) 969-1167 · Fax (630) 969-1297
Phone(630) 969-1167
Fax(630) 969-1297
Organization SubpartNo
Authorized OfficialDavid P GerardCo-owner · (630) 969-1167
Enumeration DateMarch 6, 2007
Last NPPES UpdateApril 28, 2008
✔ NPI 1205966678 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
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.
3825 HIGHLAND AVE, Downers Grove, IL 60515
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Other Identifiers 1

Medicare PIN307951IL

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X MULTIPLE SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Gastroenterology Services, Ltd is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

5

Medicare enrollment records show 5 clinicians reassign Medicare billing to Gastroenterology Services, Ltd, which bills Medicare for the services they deliver. Of these, 3 practice at this address and 4 within 10 miles. They are listed nearest first.

Clinicians, nearest first (5)

David Gerard, M.D.
Internal Medicine
NPI 1942312210
3825 HIGHLAND AVE SUITE 203
Downers Grove, IL 60515
(630) 969-1167
✔ PECOS✔ Accepts MedicareSame address
John Holden, MD
Gastroenterology
NPI 1356341846
3825 HIGHLAND AVE SUITE 203
Downers Grove, IL 60515
(630) 969-1167
✔ PECOSSame address
Manfred Raiser, M.D.
Gastroenterology
NPI 1306958665
3825 HIGHLAND AVE SUITE 203
Downers Grove, IL 60515
(630) 969-1167
✔ PECOSSame address
Suriya Sastri, M.D.
Gastroenterology
NPI 1316904816
6900 S MADISON ST STE 102
Willowbrook, IL 60527
(630) 325-8684
✔ PECOS✔ Accepts Medicare5.3 mi
Ajay Bajaj, MD
Gastroenterology
NPI 1518943513
4901 W 79TH ST SUITE 1
Burbank, IL 60459
(708) 636-0006
✔ PECOS✔ Accepts Medicare14 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 Gastroenterology Services, Ltd's NPI number?

The NPI number for Gastroenterology Services, Ltd is 1205966678. It was assigned to this organization in the NPPES registry on March 6, 2007.

Where is Gastroenterology Services, Ltd located?

Gastroenterology Services, Ltd is located at 3825 Highland Ave Suite 203, Downers Grove, IL 60515. The listed phone number is (630) 969-1167.

What is Gastroenterology Services, Ltd's specialty?

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

Is Gastroenterology Services, Ltd enrolled in Medicare?

Yes. Gastroenterology Services, Ltd is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Gastroenterology Services, Ltd?

According to the CMS Revalidation Reassignment List (October 2026 release), 5 clinicians in 2 Medicare specialties reassign their Medicare billing to Gastroenterology Services, Ltd. 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 Gastroenterology (4) and Internal Medicine (1). Of these, 3 practice at this address and 4 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Gastroenterology Services, Ltd was last updated on April 28, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.