DRS. LEAHY & DISALVO-OST, P.C.
NPI 1093851487
Optometrist in Oak Lawn, IL
About Drs. Leahy & Disalvo-ost, P.c. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DRS. LEAHY & DISALVO-OST, P.C. (NPI 1093851487) is a healthcare organization registered as an optometrist in Oak Lawn, Illinois and active in the NPI registry since January 2007. The organization lists Margaret E. Pawelski, Manager, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 2
Group Practice 1
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)
Drs. Leahy & Disalvo-ost, P.c. 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
5Medicare enrollment records show 5 clinicians reassign Medicare billing to Drs. Leahy & Disalvo-Ost, P.C., which bills Medicare for the services they deliver. Of these, 1 practice at this address and 5 within 10 miles. They are listed nearest first.
Clinicians, nearest first (5)
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Medical Equipment Supplier Medicare DMEPOS 2
Medicare supplier enrollment and the product categories Drs Van Lente & Leahy PC carries, from the Medicare DMEPOS supplier directory.
Drs Van Lente & Leahy PC
DMEPOS supplier · Oaklawn, ILOperated by Drs. Leahy & Disalvo-Ost, P.C.Accepts Medicare assignment
Drs Van Lente & Leahy PC agrees to accept the Medicare-approved amount as full payment for covered equipment and supplies. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Product Categories
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 Drs. Leahy & Disalvo-Ost, P.C.'s NPI number?
The NPI number for Drs. Leahy & Disalvo-Ost, P.C. is 1093851487. It was assigned to this organization in the NPPES registry on January 30, 2007.
Where is Drs. Leahy & Disalvo-Ost, P.C. located?
Drs. Leahy & Disalvo-Ost, P.C. is located at 4445 W 95th St, Oak Lawn, IL 60453. The listed phone number is (708) 425-6500.
What is Drs. Leahy & Disalvo-Ost, P.C.'s specialty?
The primary specialty registered for this NPI is Optometrist with taxonomy code 152W00000X.
Is Drs. Leahy & Disalvo-Ost, P.C. enrolled in Medicare?
Yes. Drs. Leahy & Disalvo-Ost, P.C. is registered in the Medicare PECOS enrollment system.
When is Drs. Leahy & Disalvo-Ost, P.C.'s Medicare revalidation due?
According to the CMS Revalidation Due Date List (October 2026 release), the Medicare DME enrollment for this organization (Illinois, Physician - Optometrist) 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 Drs. Leahy & Disalvo-Ost, P.C.?
According to the CMS Revalidation Reassignment List (October 2026 release), 5 clinicians, all in Optometry, reassign their Medicare billing to Drs. Leahy & Disalvo-Ost, P.C.. 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, 1 practice at this address and 5 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Does Drs. Leahy & Disalvo-Ost, P.C. accept Medicare assignment for medical equipment?
Yes. As a Medicare medical equipment supplier, Drs Van Lente & Leahy PC accepts Medicare assignment: the supplier accepts the Medicare-approved amount as payment in full for covered equipment and supplies.
When was this NPI record last updated?
The NPPES record for Drs. Leahy & Disalvo-Ost, P.C. was last updated on August 17, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.
# Drs. Leahy & Disalvo-Ost, P.c. · NPI 1093851487
Optometrist organization in Oak Lawn, Illinois. Organization record, active in the CMS NPPES registry since January 30, 2007.
## Identity
- **NPI:** 1093851487 (Entity type: Organization)
- **Enumerated:** January 30, 2007
- **Primary specialty:** Optometrist · taxonomy 152W00000X
- **Organization subpart:** No
- **Authorized official:** Margaret Pawelski, MANAGER
## Practice location
- **Address:** 4445 W 95TH ST, Oak Lawn, IL 60453-7219
- **Phone:** (708) 425-6500 · **Fax:** (708) 425-1455
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Medicare revalidation due:** February 28, 2027 (DME, Illinois, Physician - Optometrist) · CMS Revalidation Due Date List, October 2026 release
- **Clinicians billing through this organization:** 5 clinicians (Optometry) reassign Medicare billing to this organization (form CMS-855R); 1 practice at this address and 5 within 10 miles · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** August 17, 2018
- **Other identifiers:** Other 0========= (IL); Other CN3870 (IL)
---
Source: [NPI Profile](https://npiprofile.com/npi/1093851487) · Data from the CMS NPPES public registry.