MARGARET ROZIER CHEN M.D,
NPI 1356752679
Pediatrics in Saint Louis, MO
About Margaret Rozier Chen M.d, NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARGARET ROZIER CHEN M.D, (NPI 1356752679) is an individual pediatrics provider in Saint Louis, Missouri, licensed in Missouri (2017005240) and active in the NPI registry since May 2014. She is enrolled in Medicare PECOS and is a graduate of Saint Louis University School Of Medicine (2014).
NPPES Registry Identity
Specialties & Licenses
Group Practice 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
Margaret Rozier Chen 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
3Medicare enrollment records show Margaret Chen reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Saint Louis, MO 63104
- Reassigned Medicare billing, Missouri enrollment
- 1,294 clinicians in this Medicare group
Saint Louis, MO 63117
- Reassigned Medicare billing, Missouri enrollment
- 741 clinicians in this Medicare group
Saint Louis, MO 63139
- Reassigned Medicare billing, Missouri enrollment
- Medicare enrollment name: Ssm Cardinal Glennon Children's Hospital
- 414 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 63104 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 63104
SAINT LOUIS, MO 63104
ST.LOUIS, MO 63104
SAINT LOUIS, MO 63104
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 Chen's NPI number?
The NPI number for Margaret Chen is 1356752679. It was assigned to this individual provider in the NPPES registry on May 9, 2014.
Where is Margaret Chen located?
Margaret Chen practices at 1465 S Grand Blvd, Saint Louis, MO 63104. The listed phone number is (314) 268-4070.
What is Margaret Chen's specialty?
The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.
Is Margaret Chen enrolled in Medicare?
Yes. Margaret Chen 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 Margaret Chen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Margaret Chen reassigns Medicare benefits to 3 organizations: Ssm Health Care Group (Saint Louis, MO), Ssm Health Care St. Louis (Saint Louis, MO) and Ssm Cardinal Glennon Childrens Hospital (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 Margaret Chen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Margaret Chen 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 4 other insurers list Margaret Chen 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 Chen was last updated on January 15, 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.
# Margaret Rozier Chen, M.D, · NPI 1356752679
Pediatrics physician in Saint Louis, Missouri. Individual provider, active in the CMS NPPES registry since May 9, 2014.
## Identity
- **NPI:** 1356752679 (Entity type: Individual)
- **Enumerated:** May 9, 2014
- **Primary specialty:** Pediatrics · taxonomy 208000000X
- **State license:** 2017005240 (Missouri)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 1465 S GRAND BLVD, Saint Louis, MO 63104-1003
- **Phone:** (314) 268-4070 · **Fax:** (314) 268-4019
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Ssm Health Care Group (NPI 1306589544, Saint Louis, MO); Ssm Health Care St. Louis (NPI 1366400855, Saint Louis, MO); Ssm Cardinal Glennon Childrens Hospital (NPI 1073568226, Saint Louis, MO) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Saint Louis University School Of Medicine, class of 2014
## Record status
- **NPPES last updated:** January 15, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1356752679) · Data from the CMS NPPES public registry.