MARGARET LILLIAN FENNELL MD
NPI 1194390443
Internal Medicine in Chapel Hill, NC
About Margaret Lillian Fennell Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARGARET LILLIAN FENNELL MD (NPI 1194390443) is an individual internal medicine provider in Chapel Hill, North Carolina, licensed in North Carolina (2025-00230) and active in the NPI registry since May 2021. She is enrolled in Medicare PECOS, is affiliated with Unc Hospitals, and is a graduate of University Of Rochester School Of Medicine And Dentistry (2021).
NPPES Registry Identity
Specialties & Licenses 2
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 and accepts Medicare assignment
Margaret Lillian Fennell Md 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 Reassignments
3Medicare enrollment records show Margaret Fennell reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Chapel Hill, NC 27516
- Reassigned Medicare billing, North Carolina enrollment
- 1,337 clinicians in this Medicare group
Chapel Hill, NC 27514
- Reassigned Medicare billing, North Carolina enrollment
- 2,797 clinicians in this Medicare group
Jacksonville, NC 28546
- Reassigned Medicare billing, North Carolina enrollment
- 137 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Unc Hospitals
Acute Care Hospitals · Chapel Hill, NCPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 27516 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.
CHAPEL HILL, NC 27516
CHAPEL HILL, NC 27516
CHAPEL HILL, NC 27516
CHAPEL HILL, NC 27516
CHAPEL HILL, NC 27516
CHAPEL HILL, NC 27516
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 Fennell's NPI number?
The NPI number for Margaret Fennell is 1194390443. It was assigned to this individual provider in the NPPES registry on May 20, 2021. The provider is also known as Maggie Lillian Fennell.
Where is Margaret Fennell located?
Margaret Fennell practices at 118 Knox Way, Chapel Hill, NC 27516. The listed phone number is (984) 205-4603.
What is Margaret Fennell's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Margaret Fennell enrolled in Medicare?
Yes. Margaret Fennell 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 organizations bill Medicare for Margaret Fennell's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Margaret Fennell reassigns Medicare benefits to 3 organizations: Unc Physicians Network LLC (Chapel Hill, NC), University Of North Carolina At Chapel Hill (Chapel Hill, NC) and Onslow Memorial Hospital Inc (Jacksonville, NC). 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 Margaret Fennell's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Margaret Fennell accept?
Health plans from UnitedHealthcare list Margaret Fennell 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.
Is Margaret Fennell affiliated with any hospitals?
According to CMS data, Margaret Fennell is affiliated with Unc Hospitals.
When was this NPI record last updated?
The NPPES record for Margaret Fennell was last updated on November 22, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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 Lillian Fennell, MD · NPI 1194390443
Internal Medicine physician in Chapel Hill, North Carolina. Individual provider, active in the CMS NPPES registry since May 20, 2021.
## Identity
- **NPI:** 1194390443 (Entity type: Individual)
- **Enumerated:** May 20, 2021
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 2025-00230 (North Carolina)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 118 KNOX WAY, Chapel Hill, NC 27516-6610
- **Phone:** (984) 205-4603 · **Fax:** (984) 215-5942
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): Unc Physicians Network LLC (NPI 1306260674, Chapel Hill, NC); University Of North Carolina At Chapel Hill (NPI 1780669200, Chapel Hill, NC); Onslow Memorial Hospital Inc (NPI 1679535496, Jacksonville, NC) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Rochester School Of Medicine And Dentistry, class of 2021
## Record status
- **NPPES last updated:** November 22, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1194390443) · Data from the CMS NPPES public registry.