DIANNA L KORNHARDT ANP
NPI 1982834990
Nurse Practitioner - Adult Health in Festus, MO
About Dianna L Kornhardt Anp NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DIANNA L KORNHARDT ANP (NPI 1982834990) is an individual adult health provider in Festus, Missouri, licensed in Missouri (118485) and active in the NPI registry since July 2009. She is enrolled in Medicare PECOS, is affiliated with Mercy Hospital Jefferson, and is a graduate of Other (2009).
NPPES Registry Identity
Specialties & Licenses 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
Dianna L Kornhardt Anp 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 Reassignment
Medicare enrollment records show Dianna Kornhardt reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Festus, MO 63028
- Reassigned Medicare billing, Missouri enrollment
- 299 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 3
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
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Mercy Hospital Jefferson
Acute Care Hospitals · Festus, MOPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 63028 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 12
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
FESTUS, MO 63028
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 Dianna Kornhardt's NPI number?
The NPI number for Dianna Kornhardt is 1982834990. It was assigned to this individual provider in the NPPES registry on July 24, 2009.
Where is Dianna Kornhardt located?
Dianna Kornhardt practices at 1400 Highway 61, Festus, MO 63028. The listed phone number is (636) 933-1299.
What is Dianna Kornhardt's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Adult Health, with taxonomy code 363LA2200X.
Is Dianna Kornhardt enrolled in Medicare?
Yes. Dianna Kornhardt 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 organization bills Medicare for Dianna Kornhardt's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Dianna Kornhardt reassigns Medicare benefits to Mercy Clinic Adult Hospitalists- Jefferson, LLC (Festus, MO). The 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 Dianna Kornhardt's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Dianna Kornhardt 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 1 other insurer list Dianna Kornhardt 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 Dianna Kornhardt affiliated with any hospitals?
According to CMS data, Dianna Kornhardt is affiliated with Mercy Hospital Jefferson.
When was this NPI record last updated?
The NPPES record for Dianna Kornhardt was last updated on September 22, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.
# Dianna L Kornhardt, ANP · NPI 1982834990
Adult Health physician in Festus, Missouri. Individual provider, active in the CMS NPPES registry since July 24, 2009.
## Identity
- **NPI:** 1982834990 (Entity type: Individual)
- **Enumerated:** July 24, 2009
- **Primary specialty:** Nurse Practitioner - Adult Health · taxonomy 363LA2200X
- **State license:** 118485 (Missouri)
- **Sole proprietor:** No
## Practice location
- **Address:** 1400 HIGHWAY 61, Festus, MO 63028-4100
- **Phone:** (636) 933-1299 · **Fax:** (636) 933-1224
## 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:** Mercy Clinic Adult Hospitalists- Jefferson, LLC (NPI 1083052492, Festus, MO), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2009
## Record status
- **NPPES last updated:** September 22, 2010
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Source: [NPI Profile](https://npiprofile.com/npi/1982834990) · Data from the CMS NPPES public registry.