DR. SETH MATTHEW HARRIS DO
NPI 1740711217
Pediatrics - Pediatric Cardiology in Saint Louis, MO
About Dr. Seth Matthew Harris Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. SETH MATTHEW HARRIS DO (NPI 1740711217) is an individual pediatric cardiology provider in Saint Louis, Missouri, licensed in Missouri (2021013354) and active in the NPI registry since March 2017. He is enrolled in Medicare PECOS and is a graduate of Michigan State University College Of Osteopathic Medicine (2017).
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. Seth Matthew Harris Do 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
4Medicare enrollment records show Seth Harris reassigns Medicare billing to 4 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
Farmington, MO 63640
- Reassigned Medicare billing, Missouri enrollment
- 595 clinicians in this Medicare group
Springfield, MO 65807
- Reassigned Medicare billing, Missouri enrollment
- 39 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.
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 Seth Harris's NPI number?
The NPI number for Seth Harris is 1740711217. It was assigned to this individual provider in the NPPES registry on March 25, 2017.
Where is Seth Harris located?
Seth Harris practices at 1 Childrens Pl Div Ped Cardiology, Saint Louis, MO 63110. The listed phone number is (314) 454-6095.
What is Seth Harris's specialty?
The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Cardiology, with taxonomy code 2080P0202X.
Is Seth Harris enrolled in Medicare?
Yes. Seth Harris 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 Seth Harris's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Seth Harris reassigns Medicare benefits to 4 organizations: Washington University (Saint Louis, MO), Washington University Physicians In Illinois, Inc (Saint Louis, MO), Saint Francis Medical Center (Farmington, MO) and Lester E Cox Medical Centers (Springfield, 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 Seth Harris's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Seth Harris accept?
Health plans from Anthem Blue Cross and Blue Shield, Cox HealthPlans, Oscar Insurance Company and UnitedHealthcare list Seth Harris 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 Seth Harris was last updated on February 9, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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. Seth Matthew Harris, DO · NPI 1740711217
Pediatric Cardiology physician in Saint Louis, Missouri. Individual provider, active in the CMS NPPES registry since March 25, 2017.
## Identity
- **NPI:** 1740711217 (Entity type: Individual)
- **Enumerated:** March 25, 2017
- **Primary specialty:** Pediatrics - Pediatric Cardiology · taxonomy 2080P0202X
- **State license:** 2021013354 (Missouri)
- **Sole proprietor:** No
## Practice location
- **Address:** 1 CHILDRENS PL, DIV PED CARDIOLOGY, Saint Louis, MO 63110-1002
- **Phone:** (314) 454-6095 · **Fax:** (314) 884-6008
## 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:** 4 organizations under Medicare reassignment (form CMS-855R): Washington University (NPI 1194765685, Saint Louis, MO); Washington University Physicians In Illinois, Inc (NPI 1174015515, Saint Louis, MO); Saint Francis Medical Center (NPI 1013585561, Farmington, MO); Lester E Cox Medical Centers (NPI 1851799555, Springfield, MO) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Michigan State University College Of Osteopathic Medicine, class of 2017
## Record status
- **NPPES last updated:** February 9, 2026
- **Other identifiers:** Medicaid 200096381 (MO)
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Source: [NPI Profile](https://npiprofile.com/npi/1740711217) · Data from the CMS NPPES public registry.