INTERNAL MEDICINE CENTER
NPI 1588840607
Clinic/Center - Primary Care in Downers Grove, IL
About Internal Medicine Center NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
INTERNAL MEDICINE CENTER (NPI 1588840607) is a healthcare organization registered as a primary care in Downers Grove, Illinois and active in the NPI registry since January 2008. The organization holds a CLIA Waiver certificate valid through May 30, 2028 and lists Ravikiran N Tamragouri, President, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 5
Accepted 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)
Internal Medicine Center is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
Medicare enrollment records show 1 clinician reassigns Medicare billing to Internal Medicine Center, which bills Medicare for the services this clinician delivers.
Clinician (1)
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
CLIA Laboratory Certificates CMS CLIA
Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.
Certificate of Waiver 14D0720399
Internal Medicine Center Sc · Downers Grove, ILFrequently 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 Internal Medicine Center's NPI number?
The NPI number for Internal Medicine Center is 1588840607. It was assigned to this organization in the NPPES registry on January 18, 2008.
Where is Internal Medicine Center located?
Internal Medicine Center is located at 1909 Ogden Ave, Downers Grove, IL 60515. The listed phone number is (630) 241-1616.
What is Internal Medicine Center's specialty?
The primary specialty registered for this NPI is Clinic/Center, specializing in Primary Care, with taxonomy code 261QP2300X.
Is Internal Medicine Center enrolled in Medicare?
Yes. Internal Medicine Center is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Internal Medicine Center?
According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Internal Medicine) reassigns their Medicare billing to Internal Medicine Center. 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. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Does Internal Medicine Center hold a CLIA laboratory certificate?
Yes. A Certificate of Waiver (number 14D0720399) is associated with this NPI, valid through May 30, 2028. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.
What insurance does Internal Medicine Center accept?
Health plans from Ambetter Health and Ambetter Health of Delaware list Internal Medicine Center 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 Internal Medicine Center was last updated on May 10, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.
# Internal Medicine Center · NPI 1588840607
Primary Care organization in Downers Grove, Illinois. Organization record, active in the CMS NPPES registry since January 18, 2008.
## Identity
- **NPI:** 1588840607 (Entity type: Organization)
- **Enumerated:** January 18, 2008
- **Primary specialty:** Clinic/Center - Primary Care · taxonomy 261QP2300X
- **Organization subpart:** No
- **Authorized official:** Ravikiran Tamragouri, PRESIDENT
## Practice location
- **Address:** 1909 OGDEN AVE, Downers Grove, IL 60515-2602
- **Phone:** (630) 241-1616 · **Fax:** (630) 541-0066
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 1 clinician (Internal Medicine) reassigns Medicare billing to this organization (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** May 10, 2010
- **Other identifiers:** Medicare UPIN E49140 (IL); Medicaid 0========= (IL); Medicaid 036073705 (IL); and 2 more
- **CLIA laboratory certificates:** 1 on file
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Source: [NPI Profile](https://npiprofile.com/npi/1588840607) · Data from the CMS NPPES public registry.