DR. EUGENE KELLY GESSERT AU.D.
NPI 1457559080
Audiologist in O Fallon, MO
About Dr. Eugene Kelly Gessert Au.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. EUGENE KELLY GESSERT AU.D. (NPI 1457559080) is an individual audiologist in O Fallon, Missouri, licensed in Missouri (100196) and active in the NPI registry since July 2007. He maintains 2 additional practice locations and is a graduate of Other (2000).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 2
Other Identifiers 1
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. Eugene Kelly Gessert Au.d. 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
3Medicare enrollment records show Eugene Gessert reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Saint Louis, MO 63141
- Reassigned Medicare billing, Missouri enrollment
- 241 clinicians in this Medicare group
Washington, MO 63090
- Reassigned Medicare billing, Missouri enrollment
- 178 clinicians in this Medicare group
Saint Louis, MO 63128
- Reassigned Medicare billing, Missouri enrollment
- 186 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 2
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 63366 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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 Eugene Gessert's NPI number?
The NPI number for Eugene Gessert is 1457559080. It was assigned to this individual provider in the NPPES registry on July 5, 2007.
Where is Eugene Gessert located?
Eugene Gessert practices at 300 Winding Woods Dr Ste 208A, O Fallon, MO 63366. The listed phone number is (314) 251-5850.
What is Eugene Gessert's specialty?
The primary specialty registered for this NPI is Audiologist with taxonomy code 231H00000X.
Is Eugene Gessert enrolled in Medicare?
Yes. Eugene Gessert 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 Eugene Gessert's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Eugene Gessert reassigns Medicare benefits to 3 organizations: Mercy Hospitals East Communities (Saint Louis, MO), Mercy Hospitals East Communities (Washington, MO) and Mercy Hospital South (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 Eugene Gessert's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Eugene Gessert accept?
Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from Arkansas Health & Wellness, Ambetter from Sunflower Health Plan and Ambetter of Oklahoma and 3 other insurers list Eugene Gessert 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 Eugene Gessert was last updated on June 27, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Dr. Eugene Kelly Gessert, AU.D. · NPI 1457559080
Audiologist provider in O Fallon, Missouri. Individual provider, active in the CMS NPPES registry since July 5, 2007.
## Identity
- **NPI:** 1457559080 (Entity type: Individual)
- **Enumerated:** July 5, 2007
- **Primary specialty:** Audiologist · taxonomy 231H00000X
- **State license:** 100196 (Missouri)
- **Sole proprietor:** No
## Practice location
- **Address:** 300 WINDING WOODS DR STE 208A, O Fallon, MO 63366-4773
- **Phone:** (314) 251-5850
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): Mercy Hospitals East Communities (NPI 1255790762, Saint Louis, MO); Mercy Hospitals East Communities (NPI 1104912997, Washington, MO); Mercy Hospital South (NPI 1568481984, Saint Louis, MO) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2000
## Record status
- **NPPES last updated:** June 27, 2024
- **Other identifiers:** Medicaid 337455505 (MO)
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Source: [NPI Profile](https://npiprofile.com/npi/1457559080) · Data from the CMS NPPES public registry.