WILLIAMS EYE INSTITUTE, PC
NPI 1689670390
Clinic/Center - Ambulatory Surgical in Hammond, IN
About Williams Eye Institute, Pc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WILLIAMS EYE INSTITUTE, PC (NPI 1689670390), doing business as Williams Eye Surgery Center, is a healthcare organization registered as an ambulatory surgical in Hammond, Indiana and active in the NPI registry since June 2005. The organization holds 2 active CLIA laboratory certificates and lists Blake L. Williams, Medical Director, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Other Identifiers 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)
Williams Eye Institute, Pc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
2Medicare enrollment records show 2 clinicians reassign Medicare billing to Williams Eye Institute, PC, which bills Medicare for the services they deliver. Of these, 2 practice at this address. They are listed nearest first.
Clinicians, nearest first (2)
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 2
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 15D0713088
Williams Eye Surgery Center · Hammond, INCertificate of Waiver 15D0695659
Dba Williams Eye Surgery Center-Merrillville Novamed Surgery Center Of Merrillville · Crown Point, INAreas of Expertise CMS Part B claims 4
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.
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 Williams Eye Institute, PC's NPI number?
The NPI number for Williams Eye Institute, PC is 1689670390. It was assigned to this organization in the NPPES registry on June 27, 2005. The provider is doing business as Williams Eye Surgery Center.
Where is Williams Eye Institute, PC located?
Williams Eye Institute, PC is located at 6836 Hohman Avenue, Hammond, IN 46324. The listed phone number is (219) 937-5063.
What is Williams Eye Institute, PC's specialty?
The primary specialty registered for this NPI is Clinic/Center, specializing in Ambulatory Surgical, with taxonomy code 261QA1903X.
Is Williams Eye Institute, PC enrolled in Medicare?
Yes. Williams Eye Institute, PC is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Williams Eye Institute, PC?
According to the CMS Revalidation Reassignment List (October 2026 release), 2 clinicians reassign their Medicare billing to Williams Eye Institute, PC, in Certified Registered Nurse Anesthetist (CRNA) and Ophthalmology. 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. Of these, 2 practice at this address. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Does Williams Eye Institute, PC hold CLIA laboratory certificates?
Yes. 2 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 Williams Eye Institute, PC accept?
Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian, Anthem Blue Cross and Blue Shield and CareSource and 1 other insurer list Williams Eye Institute, PC 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 Williams Eye Institute, PC was last updated on October 20, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.
# Williams Eye Institute, Pc · NPI 1689670390
Ambulatory Surgical organization in Hammond, Indiana. Organization record, active in the CMS NPPES registry since June 27, 2005.
## Identity
- **NPI:** 1689670390 (Entity type: Organization)
- **Enumerated:** June 27, 2005
- **Primary specialty:** Clinic/Center - Ambulatory Surgical · taxonomy 261QA1903X
- **Also known as:** Williams Eye Surgery Center (Doing Business As)
- **Organization subpart:** No
- **Authorized official:** Blake Williams, MEDICAL DIRECTOR
## Practice location
- **Address:** 6836 HOHMAN AVENUE, Hammond, IN 46324-1410
- **Phone:** (219) 937-5063 · **Fax:** (219) 937-5093
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 2 clinicians in 2 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Certified Registered Nurse Anesthetist (CRNA) (1), Ophthalmology (1); 2 practice at this address · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** October 20, 2026
- **Other identifiers:** Medicaid 200390130 (IN)
- **CLIA laboratory certificates:** 2 on file
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Source: [NPI Profile](https://npiprofile.com/npi/1689670390) · Data from the CMS NPPES public registry.