MARK MADDOX
NPI 1255744124
Internal Medicine in Durham, NC
About Mark Maddox NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARK MADDOX (NPI 1255744124) is an individual internal medicine provider in Durham, North Carolina, licensed in Pennsylvania (OT016080) and active in the NPI registry since June 2014. He is enrolled in Medicare PECOS, is affiliated with Duke University Hospital, and is a graduate of Other (2014).
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 and accepts Medicare assignment
Mark Maddox 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
2Medicare enrollment records show Mark Maddox reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Durham, NC 27710
- Reassigned Medicare billing, North Carolina enrollment
- 3,671 clinicians in this Medicare group
Durham, NC 27704
- Reassigned Medicare billing, North Carolina enrollment
- 1,482 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.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Duke University Hospital
Acute Care Hospitals · Durham, NCDuke Regional Hospital
Acute Care Hospitals · Durham, NCPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 27705 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.
DURHAM, NC 27705
DURHAM, NC 27705
DURHAM, NC 27705
DURHAM, NC 27705
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 Mark Maddox's NPI number?
The NPI number for Mark Maddox is 1255744124. It was assigned to this individual provider in the NPPES registry on June 8, 2014. The provider is also known as N/A N/A Do.
Where is Mark Maddox located?
Mark Maddox practices at 508 Fulton St, Durham, NC 27705. The listed phone number is (919) 286-0411.
What is Mark Maddox's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Mark Maddox enrolled in Medicare?
Yes. Mark Maddox 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 Mark Maddox's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mark Maddox reassigns Medicare benefits to 2 organizations: Duke Health Integrated Practice, Inc. (Durham, NC) and Duke University Health System, Inc. (Durham, 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 Mark Maddox's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mark Maddox accept?
Health plans from Ambetter from Absolute Total Care, Ambetter of North Carolina, Ambetter of Tennessee, Blue Cross and Blue Shield of NC and Cigna Healthcare list Mark Maddox 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 Mark Maddox affiliated with any hospitals?
According to CMS data, Mark Maddox is affiliated with Duke University Hospital and Duke Regional Hospital.
When was this NPI record last updated?
The NPPES record for Mark Maddox was last updated on June 12, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.
# Mark Maddox · NPI 1255744124
Internal Medicine physician in Durham, North Carolina. Individual provider, active in the CMS NPPES registry since June 8, 2014.
## Identity
- **NPI:** 1255744124 (Entity type: Individual)
- **Enumerated:** June 8, 2014
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** OT016080 (Pennsylvania)
- **Sole proprietor:** No
## Practice location
- **Address:** 508 FULTON ST, Durham, NC 27705-3875
- **Phone:** (919) 286-0411
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Duke Health Integrated Practice, Inc. (NPI 1205553369, Durham, NC); Duke University Health System, Inc. (NPI 1376574798, Durham, NC) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2014
## Record status
- **NPPES last updated:** June 12, 2020
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Source: [NPI Profile](https://npiprofile.com/npi/1255744124) · Data from the CMS NPPES public registry.