DR. WILLIAM CARL MOSTERTZ III MD
NPI 1679928022
Internal Medicine - Advanced Heart Failure and Transplant Cardiology in Chapel Hill, NC
About Dr. William Carl Mostertz Iii Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. WILLIAM CARL MOSTERTZ III MD (NPI 1679928022) is an individual advanced heart failure and transplant cardiology provider in Chapel Hill, North Carolina, licensed in North Carolina (2022-01919) and active in the NPI registry since May 2016. He is enrolled in Medicare PECOS, is affiliated with Cape Fear Valley Medical Center, and maintains a secondary practice location in Charleston.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 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
Dr. William Carl Mostertz Iii 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
2Medicare enrollment records show William Mostertz reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Chapel Hill, NC 27514
- Reassigned Medicare billing, North Carolina enrollment
- 2,797 clinicians in this Medicare group
Rocky Mount, NC 27804
- Reassigned Medicare billing, North Carolina enrollment
- 205 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 9
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 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Cape Fear Valley Medical Center
Acute Care Hospitals · Fayetteville, NCSoutheastern Regional Medical Center
Acute Care Hospitals · Lumberton, NCUnc Hospitals
Acute Care Hospitals · Chapel Hill, NCFirsthealth Moore Regional Hospital
Acute Care Hospitals · Pinehurst, NCUnc Health Nash
Acute Care Hospitals · Rocky Mount, NCPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 27599 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 12
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
CHAPEL HILL, NC 27599
CHAPEL HILL, NC 27599
CHAPEL HILL, NC 27599
CHAPEL HILL, NC 27599
CHAPEL HILL, NC 27599
CHAPEL HILL, NC 27599
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 William Mostertz's NPI number?
The NPI number for William Mostertz is 1679928022. It was assigned to this individual provider in the NPPES registry on May 3, 2016.
Where is William Mostertz located?
William Mostertz practices at 160 Dental Cir, Chapel Hill, NC 27599. The listed phone number is (919) 966-5205.
What is William Mostertz's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Advanced Heart Failure and Transplant Cardiology, with taxonomy code 207RA0001X.
Is William Mostertz enrolled in Medicare?
Yes. William Mostertz 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 William Mostertz's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Mostertz reassigns Medicare benefits to 2 organizations: University Of North Carolina At Chapel Hill (Chapel Hill, NC) and Nhcs Physicians Inc (Rocky Mount, 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 William Mostertz's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does William Mostertz accept?
Health plans from Blue Cross and Blue Shield of NC and UnitedHealthcare list William Mostertz 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 William Mostertz affiliated with any hospitals?
According to CMS data, William Mostertz is affiliated with Cape Fear Valley Medical Center, Southeastern Regional Medical Center, Unc Hospitals, Firsthealth Moore Regional Hospital and Unc Health Nash.
When was this NPI record last updated?
The NPPES record for William Mostertz was last updated on August 31, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# Dr. William Carl Mostertz III, MD · NPI 1679928022
Advanced Heart Failure and Transplant Cardiology physician in Chapel Hill, North Carolina. Individual provider, active in the CMS NPPES registry since May 3, 2016.
## Identity
- **NPI:** 1679928022 (Entity type: Individual)
- **Enumerated:** May 3, 2016
- **Primary specialty:** Internal Medicine - Advanced Heart Failure and Transplant Cardiology · taxonomy 207RA0001X
- **State license:** 2022-01919 (North Carolina)
- **Sole proprietor:** No
## Practice location
- **Address:** 160 DENTAL CIR, Chapel Hill, NC 27599-0001
- **Phone:** (919) 966-5205
## 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): University Of North Carolina At Chapel Hill (NPI 1780669200, Chapel Hill, NC); Nhcs Physicians Inc (NPI 1003028630, Rocky Mount, NC) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Medical University Of South Carolina College Of Medicine, class of 2016
## Record status
- **NPPES last updated:** August 31, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1679928022) · Data from the CMS NPPES public registry.