MARY KATE MELLIN FNP
NPI 1265108013
Nurse Practitioner - Family in Middletown, DE
About Mary Kate Mellin Fnp NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARY KATE MELLIN FNP (NPI 1265108013) is an individual family provider in Middletown, Delaware, licensed in Delaware (LG-0011619) and active in the NPI registry since August 2021. 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)
Mary Kate Mellin Fnp is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Mary Mellin reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Newark, DE 19718
- Reassigned Medicare billing, Delaware and Pennsylvania enrollments
- Medicare enrollment name: Christiana Care Health Services Inc
- Also billed through NPI 1952140295 (Pennsylvania)
- 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.
Areas of Expertise CMS Part B claims 3
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 19709 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 6
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
MIDDLETOWN, DE 19709
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 Mary Mellin's NPI number?
The NPI number for Mary Mellin is 1265108013. It was assigned to this individual provider in the NPPES registry on August 20, 2021. The provider is also known as Mary Kate Wilmoth.
Where is Mary Mellin located?
Mary Mellin practices at 621 Middletown Odessa Rd, Middletown, DE 19709. The listed phone number is (302) 203-2230.
What is Mary Mellin's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.
Is Mary Mellin enrolled in Medicare?
Yes. Mary Mellin is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Mary Mellin's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mary Mellin reassigns Medicare benefits to Christiana Care Health System (Newark, 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 Mary Mellin's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mary Mellin accept?
Health plans from AmeriHealth Caritas Next and Highmark Blue Cross Blue Shield Delaware list Mary Mellin 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 Mary Mellin was last updated on August 20, 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.
# Mary Kate Mellin, FNP · NPI 1265108013
Family physician in Middletown, Delaware. Individual provider, active in the CMS NPPES registry since August 20, 2021.
## Identity
- **NPI:** 1265108013 (Entity type: Individual)
- **Enumerated:** August 20, 2021
- **Primary specialty:** Nurse Practitioner - Family · taxonomy 363LF0000X
- **State license:** LG-0011619 (Delaware)
- **Sole proprietor:** No
## Practice location
- **Address:** 621 MIDDLETOWN ODESSA RD, Middletown, DE 19709-9602
- **Phone:** (302) 203-2230
## 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 System (NPI 1770615494, Newark, DE), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** August 20, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1265108013) · Data from the CMS NPPES public registry.