DR. KARI L. HORN D.C.
NPI 1649266586
Chiropractor in Saint Peters, MO
About Dr. Kari L. Horn D.c. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. KARI L. HORN D.C. (NPI 1649266586) is an individual chiropractor in Saint Peters, Missouri, licensed in Missouri (006627) and active in the NPI registry since September 2005. She is affiliated with Mercy Hospital St Louis and is a graduate of Logan College Of Chiropractic (1997).
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Other Identifiers 2
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. Kari L. Horn D.c. 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 Kari Horn reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Saint Peters, MO 63376
- Reassigned Medicare billing, Missouri enrollment
- Medicare enrollment name: Jenny L Wiemann Dc PC
- 10 clinicians in this Medicare group
Clarkson Valley, MO 63011
- Reassigned Medicare billing, Missouri enrollment
- 9 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
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 St Louis
Acute Care Hospitals · Saint Louis, MOOther 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 Kari Horn's NPI number?
The NPI number for Kari Horn is 1649266586. It was assigned to this individual provider in the NPPES registry on September 26, 2005. The provider is also known as Dr. Kari L. Riemann D.C..
Where is Kari Horn located?
Kari Horn practices at 331 Jungermann Rd, Saint Peters, MO 63376. The listed phone number is (636) 928-5588.
What is Kari Horn's specialty?
The primary specialty registered for this NPI is Chiropractor with taxonomy code 111N00000X.
Is Kari Horn enrolled in Medicare?
Yes. Kari Horn 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 Kari Horn's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Kari Horn reassigns Medicare benefits to 2 organizations: Jenny L Wiemann Dcpc (Saint Peters, MO) and Mercy Hospitals East Communities (Clarkson Valley, 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 Kari Horn's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Kari Horn 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 Kari Horn 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 Kari Horn affiliated with any hospitals?
According to CMS data, Kari Horn is affiliated with Mercy Hospital St Louis.
When was this NPI record last updated?
The NPPES record for Kari Horn was last updated on January 7, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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. Kari L. Horn, D.C. · NPI 1649266586
Chiropractor provider in Saint Peters, Missouri. Individual provider, active in the CMS NPPES registry since September 26, 2005.
## Identity
- **NPI:** 1649266586 (Entity type: Individual)
- **Enumerated:** September 26, 2005
- **Primary specialty:** Chiropractor · taxonomy 111N00000X
- **State license:** 006627 (Missouri)
- **Sole proprietor:** No
## Practice location
- **Address:** 331 JUNGERMANN RD, Saint Peters, MO 63376-5351
- **Phone:** (636) 928-5588 · **Fax:** (636) 922-0071
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Jenny L Wiemann Dcpc (NPI 1245452093, Saint Peters, MO); Mercy Hospitals East Communities (NPI 1790720282, Clarkson Valley, MO) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Logan College Of Chiropractic, class of 1997
## Record status
- **NPPES last updated:** January 7, 2021
- **Other identifiers:** Other 120014 (MO); Other 4400823 (MO)
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Source: [NPI Profile](https://npiprofile.com/npi/1649266586) · Data from the CMS NPPES public registry.