GROSSNICKLE EYE CENTER, INC.
NPI 1265436125
Ophthalmology in Warsaw, IN
About Grossnickle Eye Center, Inc. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GROSSNICKLE EYE CENTER, INC. (NPI 1265436125) is a healthcare organization registered as an ophthalmology in Warsaw, Indiana and active in the NPI registry since June 2005. The organization lists Matthew C Ralstin, Owner, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
Group Practice 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, revalidation and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Grossnickle Eye Center, Inc. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Revalidation Due Date
Revalidation due by February 28, 2027
Medicare-enrolled providers and suppliers confirm their enrollment information with CMS on a set cycle, every 5 years for most and every 3 years for medical equipment suppliers. CMS sets the due date for each enrollment.
Clinicians Billing Medicare Through This Organization
15Medicare enrollment records show 15 clinicians reassign Medicare billing to Grossnickle Eye Center, Inc., which bills Medicare for the services they deliver. Of these, 11 practice at this address. They are listed nearest first.
Clinicians by Medicare Specialty 2
Clinicians, nearest first (15)
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 Grossnickle Eye Center, Inc.'s NPI number?
The NPI number for Grossnickle Eye Center, Inc. is 1265436125. It was assigned to this organization in the NPPES registry on June 9, 2005.
Where is Grossnickle Eye Center, Inc. located?
Grossnickle Eye Center, Inc. is located at 2251 Dubois Dr, Warsaw, IN 46580. The listed phone number is (574) 269-2777.
What is Grossnickle Eye Center, Inc.'s specialty?
The primary specialty registered for this NPI is Ophthalmology with taxonomy code 207W00000X.
Is Grossnickle Eye Center, Inc. enrolled in Medicare?
Yes. Grossnickle Eye Center, Inc. is registered in the Medicare PECOS enrollment system.
When is Grossnickle Eye Center, Inc.'s Medicare revalidation due?
According to the CMS Revalidation Due Date List (October 2026 release), the Medicare Non-DME Part B enrollment for this organization (Indiana, Clinic/Group Practice) is due for revalidation by February 28, 2027. Medicare providers and suppliers revalidate their enrollment every 5 years, and medical equipment suppliers every 3 years. Confirm current requirements with your Medicare Administrative Contractor.
How many clinicians bill Medicare through Grossnickle Eye Center, Inc.?
According to the CMS Revalidation Reassignment List (October 2026 release), 15 clinicians in 2 Medicare specialties reassign their Medicare billing to Grossnickle Eye Center, Inc.. 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 Optometry (8) and Ophthalmology (7). Of these, 11 practice at this address. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
What insurance does Grossnickle Eye Center, Inc. accept?
Health plans from Anthem Blue Cross and Blue Shield and CareSource list Grossnickle Eye Center, Inc. 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 Grossnickle Eye Center, Inc. was last updated on March 5, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.
# Grossnickle Eye Center, Inc. · NPI 1265436125
Ophthalmology organization in Warsaw, Indiana. Organization record, active in the CMS NPPES registry since June 9, 2005.
## Identity
- **NPI:** 1265436125 (Entity type: Organization)
- **Enumerated:** June 9, 2005
- **Primary specialty:** Ophthalmology · taxonomy 207W00000X
- **Organization subpart:** No
- **Authorized official:** Matthew Ralstin, OWNER
## Practice location
- **Address:** 2251 DUBOIS DR, Warsaw, IN 46580-3212
- **Phone:** (574) 269-2777 · **Fax:** (574) 371-4697
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Medicare revalidation due:** February 28, 2027 (Non-DME Part B, Indiana, Clinic/Group Practice) · CMS Revalidation Due Date List, October 2026 release
- **Clinicians billing through this organization:** 15 clinicians in 2 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Optometry (8), Ophthalmology (7); 11 practice at this address · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** March 5, 2019
- **Other identifiers:** Medicaid 200018500 (IN)
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Source: [NPI Profile](https://npiprofile.com/npi/1265436125) · Data from the CMS NPPES public registry.