GN ENDOCRINOLOGY LTD
NPI 1154799690
Internal Medicine - Endocrinology, Diabetes & Metabolism in Munster, IN
About Gn Endocrinology Ltd NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GN ENDOCRINOLOGY LTD (NPI 1154799690) is a healthcare organization registered as an endocrinology, diabetes & metabolism in Munster, Indiana and active in the NPI registry since September 2015. The organization holds 3 active CLIA laboratory certificates, maintains a secondary practice location in Hobart, and lists Amer Kassar, Md/owner, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Other Identifiers 1
Group Practice 1
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)
Gn Endocrinology Ltd is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
7Medicare enrollment records show 7 clinicians reassign Medicare billing to Gn Endocrinology Ltd, which bills Medicare for the services they deliver. Of these, 4 practice at this address and 5 within 10 miles. They are listed nearest first.
Clinicians, nearest first (7)
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 3
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 15D2264350
Gn Endocrinology Ltd · Hobart, INCertificate of Waiver 15D2104845
Gn Endocrinology Ltd · Munster, INCertificate of Waiver 15D2264353
Gn Endocrinology Ltd · Valparaiso, INFrequently 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 Gn Endocrinology Ltd's NPI number?
The NPI number for Gn Endocrinology Ltd is 1154799690. It was assigned to this organization in the NPPES registry on September 14, 2015.
Where is Gn Endocrinology Ltd located?
Gn Endocrinology Ltd is located at 10012 Calumet Ave Ste A, Munster, IN 46321. The listed phone number is (219) 227-5119.
What is Gn Endocrinology Ltd's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.
Is Gn Endocrinology Ltd enrolled in Medicare?
Yes. Gn Endocrinology Ltd is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Gn Endocrinology Ltd?
According to the CMS Revalidation Reassignment List (October 2026 release), 7 clinicians in 2 Medicare specialties reassign their Medicare billing to Gn Endocrinology 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 Nurse Practitioner (6) and Endocrinology (1). Of these, 4 practice at this address and 5 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Does Gn Endocrinology Ltd hold CLIA laboratory certificates?
Yes. 3 active CLIA laboratory certificates are associated with this NPI under the federal Clinical Laboratory Improvement Amendments program. The certificates are listed in the CLIA Laboratory Certificates section above.
What insurance does Gn Endocrinology Ltd accept?
Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian, Anthem Blue Cross and Blue Shield and CareSource list Gn Endocrinology Ltd 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 Gn Endocrinology Ltd was last updated on October 29, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.
# Gn Endocrinology Ltd · NPI 1154799690
Endocrinology, Diabetes & Metabolism organization in Munster, Indiana. Organization record, active in the CMS NPPES registry since September 14, 2015.
## Identity
- **NPI:** 1154799690 (Entity type: Organization)
- **Enumerated:** September 14, 2015
- **Primary specialty:** Internal Medicine - Endocrinology, Diabetes & Metabolism · taxonomy 207RE0101X
- **Organization subpart:** No
- **Authorized official:** Amer Kassar, MD/OWNER
## Practice location
- **Address:** 10012 CALUMET AVE STE A, Munster, IN 46321
- **Phone:** (219) 227-5119 · **Fax:** (219) 227-5190
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 7 clinicians in 2 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Nurse Practitioner (6), Endocrinology (1); 4 practice at this address and 5 within 10 miles · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** October 29, 2020
- **Other identifiers:** Medicaid 201321970A (IN)
- **CLIA laboratory certificates:** 3 on file
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Source: [NPI Profile](https://npiprofile.com/npi/1154799690) · Data from the CMS NPPES public registry.