MARI E. WELCH APN
NPI 1538433479
Nurse Practitioner - Pediatrics in Wilmington, DE
About Mari E. Welch Apn NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARI E. WELCH APN (NPI 1538433479) is an individual pediatrics provider in Wilmington, Delaware, licensed in Delaware (LJ0000273) and active in the NPI registry since February 2012. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Names 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)
Mari E. Welch Apn is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Mari Welch reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Dover, DE 19904
- Reassigned Medicare billing, Delaware enrollment
- Also billed through NPI 1356808208 (Delaware)
- 163 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 Mari Welch's NPI number?
The NPI number for Mari Welch is 1538433479. It was assigned to this individual provider in the NPPES registry on February 23, 2012. The provider is also known as Mari Panciroli.
Where is Mari Welch located?
Mari Welch practices at 1600 Rockland Rd, Wilmington, DE 19803. The listed phone number is (302) 651-4200.
What is Mari Welch's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Pediatrics, with taxonomy code 363LP0200X.
Is Mari Welch enrolled in Medicare?
Yes. Mari Welch is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Mari Welch's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mari Welch reassigns Medicare benefits to Bayhealth Medical Center, Inc (Dover, 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 Mari Welch's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mari Welch accept?
Health plans from AmeriHealth Caritas Next list Mari Welch 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 Mari Welch was last updated on September 29, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.
# Mari E. Welch, APN · NPI 1538433479
Pediatrics physician in Wilmington, Delaware. Individual provider, active in the CMS NPPES registry since February 23, 2012.
## Identity
- **NPI:** 1538433479 (Entity type: Individual)
- **Enumerated:** February 23, 2012
- **Primary specialty:** Nurse Practitioner - Pediatrics · taxonomy 363LP0200X
- **State license:** LJ0000273 (Delaware)
- **Sole proprietor:** No
## Practice location
- **Address:** 1600 ROCKLAND RD, Wilmington, DE 19803-3607
- **Phone:** (302) 651-4200 · **Fax:** (302) 651-5365
## 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:** Bayhealth Medical Center, Inc (NPI 1588456479, Dover, DE), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** September 29, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1538433479) · Data from the CMS NPPES public registry.