NATHAN ANICAS WALKER M.D.
NPI 1992119879
Psychiatry & Neurology - Sleep Medicine in Chapel Hill, NC
About Nathan Anicas Walker M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
NATHAN ANICAS WALKER M.D. (NPI 1992119879) is an individual sleep medicine provider in Chapel Hill, North Carolina, licensed in North Carolina (2020-02678) and active in the NPI registry since June 2014. He is enrolled in Medicare PECOS, is affiliated with Unc Hospitals, and is a graduate of Other (2013).
NPPES Registry Identity
Specialties & Licenses 2
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
Nathan Anicas Walker M.d. 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 Reassignment
Medicare enrollment records show Nathan Walker reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Chapel Hill, NC 27514
- Reassigned Medicare billing, North Carolina enrollment
- 2,797 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 10
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.
Unc Hospitals
Acute Care Hospitals · Chapel Hill, 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.
Referred Medical Equipment & Supplies CMS DME claims 12
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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 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 Nathan Walker's NPI number?
The NPI number for Nathan Walker is 1992119879. It was assigned to this individual provider in the NPPES registry on June 18, 2014.
Where is Nathan Walker located?
Nathan Walker practices at 101 Manning Drive, Chapel Hill, NC 27599. The listed phone number is (919) 966-8162.
What is Nathan Walker's specialty?
The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Sleep Medicine, with taxonomy code 2084S0012X.
Is Nathan Walker enrolled in Medicare?
Yes. Nathan Walker 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 organization bills Medicare for Nathan Walker's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Nathan Walker reassigns Medicare benefits to University Of North Carolina At Chapel Hill (Chapel Hill, NC). 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 Nathan Walker's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Nathan Walker accept?
Health plans from UnitedHealthcare list Nathan Walker 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 Nathan Walker affiliated with any hospitals?
According to CMS data, Nathan Walker is affiliated with Unc Hospitals and Unc Health Nash.
When was this NPI record last updated?
The NPPES record for Nathan Walker was last updated on June 17, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Nathan Anicas Walker, M.D. · NPI 1992119879
Sleep Medicine physician in Chapel Hill, North Carolina. Individual provider, active in the CMS NPPES registry since June 18, 2014.
## Identity
- **NPI:** 1992119879 (Entity type: Individual)
- **Enumerated:** June 18, 2014
- **Primary specialty:** Psychiatry & Neurology - Sleep Medicine · taxonomy 2084S0012X
- **State license:** 2020-02678 (North Carolina)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 101 MANNING DRIVE, Chapel Hill, NC 27599-1962
- **Phone:** (919) 966-8162
## 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:** University Of North Carolina At Chapel Hill (NPI 1780669200, Chapel Hill, NC), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2013
## Record status
- **NPPES last updated:** June 17, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1992119879) · Data from the CMS NPPES public registry.