DR. CHARLES MICHAEL SAMSON MD
NPI 1194932301
Pediatrics - Pediatric Gastroenterology in Saint Louis, MO
About Dr. Charles Michael Samson Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. CHARLES MICHAEL SAMSON MD (NPI 1194932301) is an individual pediatric gastroenterology provider in Saint Louis, Missouri, licensed in Missouri (2011019875) and active in the NPI registry since May 2007. He is enrolled in Medicare PECOS and is a graduate of Washington University School Of Medicine (2003).
NPPES Registry Identity
Specialties & Licenses 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. Charles Michael Samson Md 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 Charles Samson reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Saint Louis, MO 63110
- Reassigned Medicare billing, Missouri enrollment
- 628 clinicians in this Medicare group
Saint Louis, MO 63108
- Reassigned Medicare billing, Illinois enrollment
- 530 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 63110 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
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 63110
SAINT LOUIS, MO 63110
SAINT LOUIS, MO 63110
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 Charles Samson's NPI number?
The NPI number for Charles Samson is 1194932301. It was assigned to this individual provider in the NPPES registry on May 17, 2007.
Where is Charles Samson located?
Charles Samson practices at 1 Childrens Pl Div Ped Gastro, Hepatology And Nutrition, Saint Louis, MO 63110. The listed phone number is (314) 454-6173.
What is Charles Samson's specialty?
The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Gastroenterology, with taxonomy code 2080P0206X.
Is Charles Samson enrolled in Medicare?
Yes. Charles Samson 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 Charles Samson's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Charles Samson reassigns Medicare benefits to 2 organizations: Washington University (Saint Louis, MO) and Washington University Physicians In Illinois, Inc (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 Charles Samson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Charles Samson accept?
Health plans from Cox HealthPlans and UnitedHealthcare list Charles Samson 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 Charles Samson was last updated on April 17, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.
# Dr. Charles Michael Samson, MD · NPI 1194932301
Pediatric Gastroenterology physician in Saint Louis, Missouri. Individual provider, active in the CMS NPPES registry since May 17, 2007.
## Identity
- **NPI:** 1194932301 (Entity type: Individual)
- **Enumerated:** May 17, 2007
- **Primary specialty:** Pediatrics - Pediatric Gastroenterology · taxonomy 2080P0206X
- **State license:** 2011019875 (Missouri)
- **Sole proprietor:** No
## Practice location
- **Address:** 1 CHILDRENS PL, DIV PED GASTRO, HEPATOLOGY AND NUTRITION, Saint Louis, MO 63110-1002
- **Phone:** (314) 454-6173 · **Fax:** (844) 231-8912
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Washington University (NPI 1194765685, Saint Louis, MO); Washington University Physicians In Illinois, Inc (NPI 1457203135, Saint Louis, MO) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Washington University School Of Medicine, class of 2003
## Record status
- **NPPES last updated:** April 17, 2025
- **Other identifiers:** Medicaid 204405104 (MO)
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Source: [NPI Profile](https://npiprofile.com/npi/1194932301) · Data from the CMS NPPES public registry.