Quick answers
- Does Dianna L. Kornhardt accept Medicare assignment?
- Yes. Medicare's clinician data says Dianna L. Kornhardt accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Dianna L. Kornhardt see?
- In 2024, CMS data shows 62 Original Medicare patients and 270 services for Dianna L. Kornhardt. This counts Original Medicare only and measures volume, not quality.
- What is Dianna L. Kornhardt's NPI number?
- 1982834990. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Dianna L. Kornhardt, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 62 |
|---|---|
| Services billed to Medicare | 270 |
| Different services or procedures | 5 |
| Participating Medicare provider | Yes |
| Average age of these patients | 57 |
Most frequent services
- Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes (99231)117 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)114 services
- Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)36 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Depression75%
- Anxiety75%
- Arthritis45%
- COPD34%
Hospitals where Dianna L. Kornhardt works
Medicare's Facility Affiliation Data lists Dianna L. Kornhardt at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Mercy Hospital JeffersonCrystal City, MO · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 260023
Practice locations
Addresses where Dianna L. Kornhardt is enrolled with Medicare (CMS data updated October 2, 2026).
- 1400 US Hwy 61Festus, MO 63028 (636) 933‑8091
- 1400 US Hwy 61, Suite H1521Festus, MO 63028 (636) 933‑5337
Group practices
Medicare enrollment lists Dianna L. Kornhardt as a member of this group (CMS data updated October 2, 2026).
- Mercy Clinic Adult Hospitalists Jefferson LLC55 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Festus
Clinicians with the same Medicare primary specialty in Festus, MO — not a recommendation.
Other clinicians in Mercy Clinic Adult Hospitalists Jefferson LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2009 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1982834990 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians