MARGARET R. CHOU M. D.
NPI 1902880651
Obstetrics & Gynecology in Wilmington, DE
About Margaret R. Chou M. D. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARGARET R. CHOU M. D. (NPI 1902880651) is an individual obstetrics & gynecology provider in Wilmington, Delaware, licensed in Delaware (C1-0006957) and active in the NPI registry since December 2005. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 2
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)
Margaret R. Chou M. D. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Margaret Chou reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Wilmington, DE 19801
- Reassigned Medicare billing, Delaware enrollment
- 1,531 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 19803 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.
WILMINGTON, DE 19803
WILMINGTON, DE 19803
WILMINGTON, DE 19803
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 Chou's NPI number?
The NPI number for Margaret Chou is 1902880651. It was assigned to this individual provider in the NPPES registry on December 5, 2005.
Where is Margaret Chou located?
Margaret Chou practices at 1600 Rockland Rd, Wilmington, DE 19803. The listed phone number is (302) 651-4000.
What is Margaret Chou's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.
Is Margaret Chou enrolled in Medicare?
Yes. Margaret Chou is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Margaret Chou's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Margaret Chou reassigns Medicare benefits to Christiana Care Health Services Inc (Wilmington, DE). 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 Chou's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Margaret Chou accept?
Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from NH Healthy Families, Ambetter from Sunflower Health Plan and AmeriHealth Caritas Next and 1 other insurer list Margaret Chou 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 Chou was last updated on November 7, 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.
# Margaret R. Chou, M. D. · NPI 1902880651
Obstetrics & Gynecology physician in Wilmington, Delaware. Individual provider, active in the CMS NPPES registry since December 5, 2005.
## Identity
- **NPI:** 1902880651 (Entity type: Individual)
- **Enumerated:** December 5, 2005
- **Primary specialty:** Obstetrics & Gynecology · taxonomy 207V00000X
- **State license:** C1-0006957 (Delaware)
- **Sole proprietor:** No
## Practice location
- **Address:** 1600 ROCKLAND RD, Wilmington, DE 19803-3607
- **Phone:** (302) 651-4000
## 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:** Christiana Care Health Services Inc (NPI 1043853120, Wilmington, DE), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** November 7, 2024
- **Other identifiers:** Medicaid 1000023523 (DE); Medicaid 1000028523 (DE)
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Source: [NPI Profile](https://npiprofile.com/npi/1902880651) · Data from the CMS NPPES public registry.