KELLY LUDWIG M.D.
NPI 1992720361
Internal Medicine in Saint Louis, MO
About Kelly Ludwig M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
KELLY LUDWIG M.D. (NPI 1992720361) is an individual internal medicine provider in Saint Louis, Missouri, licensed in Missouri (2003009170) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS, is affiliated with Mercy Hospital South, and is a graduate of Saint Louis University School Of Medicine (2000).
NPPES Registry Identity
Specialties & Licenses
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
Kelly Ludwig M.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
10Medicare enrollment records show Kelly Ludwig reassigns Medicare billing to 10 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Saint Louis, MO 63128
- Reassigned Medicare billing, Missouri enrollment
- Medicare enrollment name: St Anthonys Physician Organization Hospitalist Services Lc
- 340 clinicians in this Medicare group
Saint Louis, MO 63128
- Reassigned Medicare billing, Missouri enrollment
- 744 clinicians in this Medicare group
Fenton, MO 63026
- Reassigned Medicare billing, Missouri enrollment
- 22 clinicians in this Medicare group
Saint Louis, MO 63141
- Reassigned Medicare billing, Missouri enrollment
- 326 clinicians in this Medicare group
Chesterfield, MO 63017
- Reassigned Medicare billing, Missouri enrollment
- 263 clinicians in this Medicare group
Festus, MO 63028
- Reassigned Medicare billing, Missouri enrollment
- 299 clinicians in this Medicare group
Washington, MO 63090
- Reassigned Medicare billing, Missouri enrollment
- 261 clinicians in this Medicare group
Winfield, MO 63389
- Reassigned Medicare billing, Missouri enrollment
- 229 clinicians in this Medicare group
Cuba, MO 65453
- Reassigned Medicare billing, Missouri enrollment
- Also billed through NPI 1245277631 (Missouri)
- 1,487 clinicians in this Medicare group
Bella Vista, AR 72714
- Reassigned Medicare billing, Arkansas enrollment
- 472 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Mercy Hospital South
Acute Care Hospitals · Saint Louis, MOPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 63128 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SAINT LOUIS, MO 63128
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 Kelly Ludwig's NPI number?
The NPI number for Kelly Ludwig is 1992720361. It was assigned to this individual provider in the NPPES registry on July 13, 2006.
Where is Kelly Ludwig located?
Kelly Ludwig practices at 10010 Kennerly Rd, Saint Louis, MO 63128. The listed phone number is (314) 525-1328.
What is Kelly Ludwig's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Kelly Ludwig enrolled in Medicare?
Yes. Kelly Ludwig 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 Kelly Ludwig's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Kelly Ludwig reassigns Medicare benefits to 10 organizations: St Anthonys Physician Organization Hospitalist Services, L.C. (Saint Louis, MO), Mercy Clinic East Communities (Saint Louis, MO), Dr. Petre I Anguelinin, LLC (Fenton, MO), Mercy Clinic Adult Hospitalists - St. Louis, LLC (Saint Louis, MO), Mercy Aco Clinical Services Inc (Chesterfield, MO) and 5 more organizations, listed in the Medicare section above. 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 Kelly Ludwig's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Kelly Ludwig accept?
Health plans from Anthem Blue Cross and Blue Shield, Health Advantage and Octave list Kelly Ludwig 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 Kelly Ludwig affiliated with any hospitals?
According to CMS data, Kelly Ludwig is affiliated with Mercy Hospital South.
When was this NPI record last updated?
The NPPES record for Kelly Ludwig was last updated on November 25, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 23 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.
# Kelly Ludwig, M.D. · NPI 1992720361
Internal Medicine physician in Saint Louis, Missouri. Individual provider, active in the CMS NPPES registry since July 13, 2006.
## Identity
- **NPI:** 1992720361 (Entity type: Individual)
- **Enumerated:** July 13, 2006
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 2003009170 (Missouri)
- **Sole proprietor:** No
## Practice location
- **Address:** 10010 KENNERLY RD, Saint Louis, MO 63128-2106
- **Phone:** (314) 525-1328
## 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:** 10 organizations under Medicare reassignment (form CMS-855R): St Anthonys Physician Organization Hospitalist Services, L.C. (NPI 1407216336, Saint Louis, MO); Mercy Clinic East Communities (NPI 1720635329, Saint Louis, MO); Dr. Petre I Anguelinin, LLC (NPI 1265538177, Fenton, MO); Mercy Clinic Adult Hospitalists - St. Louis, LLC (NPI 1841235108, Saint Louis, MO); Mercy Aco Clinical Services Inc (NPI 1063965093, Chesterfield, MO); and 5 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Saint Louis University School Of Medicine, class of 2000
## Record status
- **NPPES last updated:** November 25, 2024
- **Other identifiers:** Medicaid 209032408 (MO)
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Source: [NPI Profile](https://npiprofile.com/npi/1992720361) · Data from the CMS NPPES public registry.