ABIGAIL ALDERFER
NPI 1710450812
Social Worker - Clinical in Wilmington, DE
About Abigail Alderfer NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ABIGAIL ALDERFER (NPI 1710450812) is an individual clinical provider in Wilmington, Delaware and active in the NPI registry since January 2019. She is enrolled in Medicare PECOS and is a graduate of Other (2008).
NPPES Registry Identity
Specialties & Licenses 3
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
Abigail Alderfer 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 Reassignment
Medicare enrollment records show Abigail Alderfer 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
- 41 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 19801 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 19801
WILMINGTON, DE 19801
WILMINGTON, DE 19801
WILMINGTON, DE 19801
WILMINGTON, DE 19801
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 Abigail Alderfer's NPI number?
The NPI number for Abigail Alderfer is 1710450812. It was assigned to this individual provider in the NPPES registry on January 10, 2019.
Where is Abigail Alderfer located?
Abigail Alderfer practices at 501 W 14th St, Wilmington, DE 19801. The listed phone number is (302) 320-2100.
What is Abigail Alderfer's specialty?
The primary specialty registered for this NPI is Social Worker, specializing in Clinical, with taxonomy code 1041C0700X.
Is Abigail Alderfer enrolled in Medicare?
Yes. Abigail Alderfer 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 organization bills Medicare for Abigail Alderfer's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Abigail Alderfer reassigns Medicare benefits to Christiana Care Health Initiatives (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 Abigail Alderfer's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Abigail Alderfer 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 Abigail Alderfer 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 Abigail Alderfer was last updated on October 30, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 days 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.
# Abigail Alderfer · NPI 1710450812
Clinical provider in Wilmington, Delaware. Individual provider, active in the CMS NPPES registry since January 10, 2019.
## Identity
- **NPI:** 1710450812 (Entity type: Individual)
- **Enumerated:** January 10, 2019
- **Primary specialty:** Social Worker - Clinical · taxonomy 1041C0700X
- **Sole proprietor:** No
## Practice location
- **Address:** 501 W 14TH ST, Wilmington, DE 19801-1013
- **Phone:** (302) 320-2100
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment
- **Bills Medicare through:** Christiana Care Health Initiatives (NPI 1487116430, Wilmington, DE), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2008
## Record status
- **NPPES last updated:** October 30, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1710450812) · Data from the CMS NPPES public registry.