DR. MARGARET ASHLEY FERRIS MD
NPI 1669812905
Pediatrics - Pediatric Hematology-Oncology in Saint Louis, MO
About Dr. Margaret Ashley Ferris Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARGARET ASHLEY FERRIS MD (NPI 1669812905) is an individual pediatric hematology-oncology provider in Saint Louis, Missouri, licensed in Missouri (2017014189) and active in the NPI registry since July 2013. She is enrolled in Medicare PECOS.
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 (PECOS)
Dr. Margaret Ashley Ferris Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Margaret Ferris reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Saint Louis, MO 63110
- Reassigned Medicare billing, Missouri enrollment
- 628 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 Margaret Ferris's NPI number?
The NPI number for Margaret Ferris is 1669812905. It was assigned to this individual provider in the NPPES registry on July 1, 2013.
Where is Margaret Ferris located?
Margaret Ferris practices at 1 Childrens Pl Div Ped Hematology And Onc, Saint Louis, MO 63110. The listed phone number is (314) 454-6018.
What is Margaret Ferris's specialty?
The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Hematology-Oncology, with taxonomy code 2080P0207X.
Is Margaret Ferris enrolled in Medicare?
Yes. Margaret Ferris is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Margaret Ferris's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Margaret Ferris reassigns Medicare benefits to Washington University (Saint Louis, MO). The 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 Margaret Ferris's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Margaret Ferris accept?
Health plans from Cox HealthPlans list Margaret Ferris 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 Margaret Ferris 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. Margaret Ashley Ferris, MD · NPI 1669812905
Pediatric Hematology-Oncology physician in Saint Louis, Missouri. Individual provider, active in the CMS NPPES registry since July 1, 2013.
## Identity
- **NPI:** 1669812905 (Entity type: Individual)
- **Enumerated:** July 1, 2013
- **Primary specialty:** Pediatrics - Pediatric Hematology-Oncology · taxonomy 2080P0207X
- **State license:** 2017014189 (Missouri)
- **Sole proprietor:** No
## Practice location
- **Address:** 1 CHILDRENS PL, DIV PED HEMATOLOGY AND ONC, Saint Louis, MO 63110-1002
- **Phone:** (314) 454-6018 · **Fax:** (844) 621-4392
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Washington University (NPI 1194765685, Saint Louis, MO), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** April 17, 2025
- **Other identifiers:** Medicaid 200063156 (MO)
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Source: [NPI Profile](https://npiprofile.com/npi/1669812905) · Data from the CMS NPPES public registry.