NELSON JEN AN CHAO MD
NPI 1215951587
Internal Medicine - Medical Oncology in Durham, NC
About Nelson Jen An Chao Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
NELSON JEN AN CHAO MD (NPI 1215951587) is an individual medical oncology provider in Durham, North Carolina, licensed in North Carolina (96-01574) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS, is affiliated with Duke University Hospital, and is a graduate of Yale University School Of Medicine (1981).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 3
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
Nelson Jen An Chao 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 Nelson Chao reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Durham, NC 27704
- Reassigned Medicare billing, North Carolina enrollment
- 1,482 clinicians in this Medicare group
Durham, NC 27704
- Reassigned Medicare billing, North Carolina enrollment
- 3,671 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
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Duke University Hospital
Acute Care Hospitals · Durham, NCPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 27704 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 27704
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 Nelson Chao's NPI number?
The NPI number for Nelson Chao is 1215951587. It was assigned to this individual provider in the NPPES registry on July 27, 2006.
Where is Nelson Chao located?
Nelson Chao practices at 4101 N Roxboro St, Durham, NC 27704. The listed phone number is (919) 684-8111.
What is Nelson Chao's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Medical Oncology, with taxonomy code 207RX0202X.
Is Nelson Chao enrolled in Medicare?
Yes. Nelson Chao 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 Nelson Chao's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Nelson Chao reassigns Medicare benefits to 2 organizations: Duke University Health System, Inc. (Durham, NC) and Duke Health Integrated Practice, 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 Nelson Chao's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Nelson Chao accept?
Health plans from Ambetter Health, Ambetter from Absolute Total Care, Ambetter of North Carolina, Ambetter of Tennessee and Cigna Healthcare list Nelson Chao 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 Nelson Chao affiliated with any hospitals?
According to CMS data, Nelson Chao is affiliated with Duke University Hospital.
When was this NPI record last updated?
The NPPES record for Nelson Chao was last updated on September 19, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.
# Nelson Jen An Chao, MD · NPI 1215951587
Medical Oncology physician in Durham, North Carolina. Individual provider, active in the CMS NPPES registry since July 27, 2006.
## Identity
- **NPI:** 1215951587 (Entity type: Individual)
- **Enumerated:** July 27, 2006
- **Primary specialty:** Internal Medicine - Medical Oncology · taxonomy 207RX0202X
- **State license:** 96-01574 (North Carolina)
- **Sole proprietor:** No
## Practice location
- **Address:** 4101 N ROXBORO ST, Durham, NC 27704-2121
- **Phone:** (919) 684-8111
## 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 University Health System, Inc. (NPI 1962721308, Durham, NC); Duke Health Integrated Practice, Inc (NPI 1518725936, Durham, NC) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Yale University School Of Medicine, class of 1981
## Record status
- **NPPES last updated:** September 19, 2008
- **Other identifiers:** Medicaid 8922051 (NC); Other 22051 (NC); Medicaid 2232478 (NC)
---
Source: [NPI Profile](https://npiprofile.com/npi/1215951587) · Data from the CMS NPPES public registry.