HARRIOT G. SILLIMAN APN
NPI 1700157724
Nurse Practitioner in Wilmington, DE
About Harriot G. Silliman Apn NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
HARRIOT G. SILLIMAN APN (NPI 1700157724) is an individual nurse practitioner in Wilmington, Delaware, licensed in California (NP95002166) and active in the NPI registry since January 2012. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Harriot G. Silliman Apn is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
4Medicare enrollment records show Harriot Silliman reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Francisco, CA 94143
- Reassigned Medicare billing, California enrollment
- 5,645 clinicians in this Medicare group
San Francisco, CA 94122
- Reassigned Medicare billing, California enrollment
- 5,544 clinicians in this Medicare group
San Francisco, CA 94143
- Reassigned Medicare billing, California enrollment
- 761 clinicians in this Medicare group
San Francisco, CA 94143
- Reassigned Medicare billing, California enrollment
- 1,159 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 Harriot Silliman's NPI number?
The NPI number for Harriot Silliman is 1700157724. It was assigned to this individual provider in the NPPES registry on January 23, 2012.
Where is Harriot Silliman located?
Harriot Silliman practices at 1600 Rockland Rd, Wilmington, DE 19803. The listed phone number is (302) 651-5600.
What is Harriot Silliman's specialty?
The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.
Is Harriot Silliman enrolled in Medicare?
Yes. Harriot Silliman is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Harriot Silliman's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Harriot Silliman reassigns Medicare benefits to 4 organizations: University Of California San Francisco (San Francisco, CA), Ucsf Medical Group Business Services (San Francisco, CA), Ucsf Dept Of Surgery (San Francisco, CA) and Ucsf Pediatrics Associates (San Francisco, CA). 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 Harriot Silliman's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Harriot Silliman was last updated on May 3, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.
# Harriot G. Silliman, APN · NPI 1700157724
Nurse Practitioner physician in Wilmington, Delaware. Individual provider, active in the CMS NPPES registry since January 23, 2012.
## Identity
- **NPI:** 1700157724 (Entity type: Individual)
- **Enumerated:** January 23, 2012
- **Primary specialty:** Nurse Practitioner · taxonomy 363L00000X
- **State license:** NP95002166 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 1600 ROCKLAND RD, Wilmington, DE 19803-3607
- **Phone:** (302) 651-5600
## 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:** 4 organizations under Medicare reassignment (form CMS-855R): University Of California San Francisco (NPI 1346329380, San Francisco, CA); Ucsf Medical Group Business Services (NPI 1477624104, San Francisco, CA); Ucsf Dept Of Surgery (NPI 1477627537, San Francisco, CA); Ucsf Pediatrics Associates (NPI 1376614016, San Francisco, CA) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** May 3, 2019
---
Source: [NPI Profile](https://npiprofile.com/npi/1700157724) · Data from the CMS NPPES public registry.