DR. MICHAEL VINCENT STOCK MD
NPI 1730442500
Ophthalmology in O Fallon, IL
About Dr. Michael Vincent Stock Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MICHAEL VINCENT STOCK MD (NPI 1730442500) is an individual ophthalmology provider in O Fallon, Illinois, licensed in Missouri (2016004847) and active in the NPI registry since June 2012. He is enrolled in Medicare PECOS, is affiliated with St Anthonys Memorial Hospital, and maintains 3 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 3
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Michael Vincent Stock Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
2Medicare enrollment records show Michael Stock reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
O Fallon, IL 62269
- Reassigned Medicare billing, Illinois and Missouri enrollments
- 11 clinicians in this Medicare group
Saint Louis, MO 63108
- Reassigned Medicare billing, Missouri enrollment
- 105 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 8
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.
Hospital Affiliations CMS Care Compare 4
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
St Anthonys Memorial Hospital
Acute Care Hospitals · Effingham, ILTaylorville Memorial Hospital
Critical Access Hospitals · Taylorville, ILFayette County Hospital
Critical Access Hospitals · Vandalia, ILBarnes Jewish Hospital
Acute Care Hospitals · Saint Louis, MOPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 62269 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 6
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Michael Stock's NPI number?
The NPI number for Michael Stock is 1730442500. It was assigned to this individual provider in the NPPES registry on June 18, 2012.
Where is Michael Stock located?
Michael Stock practices at 705 Insight Ave, O Fallon, IL 62269. The listed phone number is (618) 391-1660.
What is Michael Stock's specialty?
The primary specialty registered for this NPI is Ophthalmology with taxonomy code 207W00000X.
Is Michael Stock enrolled in Medicare?
Yes. Michael Stock is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Michael Stock's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Michael Stock reassigns Medicare benefits to 2 organizations: Ideal Eye Surgery LLC (O Fallon, IL) and Washington University (Saint Louis, MO). Each 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 Michael Stock's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Michael Stock accept?
Health plans from Anthem Blue Cross and Blue Shield, Cox HealthPlans and UnitedHealthcare list Michael Stock 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.
Is Michael Stock affiliated with any hospitals?
According to CMS data, Michael Stock is affiliated with St Anthonys Memorial Hospital, Taylorville Memorial Hospital, Fayette County Hospital and Barnes Jewish Hospital.
When was this NPI record last updated?
The NPPES record for Michael Stock was last updated on December 11, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 months 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.
# Dr. Michael Vincent Stock, MD · NPI 1730442500
Ophthalmology physician in O Fallon, Illinois. Individual provider, active in the CMS NPPES registry since June 18, 2012.
## Identity
- **NPI:** 1730442500 (Entity type: Individual)
- **Enumerated:** June 18, 2012
- **Primary specialty:** Ophthalmology · taxonomy 207W00000X
- **State license:** 2016004847 (Missouri)
- **Sole proprietor:** No
## Practice location
- **Address:** 705 INSIGHT AVE, O Fallon, IL 62269-2146
- **Phone:** (618) 391-1660 · **Fax:** (618) 861-6003
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Ideal Eye Surgery LLC (NPI 1366966186, O Fallon, IL); Washington University (NPI 1013957562, Saint Louis, MO) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Washington University School Of Medicine, class of 2012
## Record status
- **NPPES last updated:** December 11, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1730442500) · Data from the CMS NPPES public registry.