SI SANDY AN M.D.
NPI 1609295591
Anesthesiology in Durham, NC
About Si Sandy An M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
SI SANDY AN M.D. (NPI 1609295591) is an individual anesthesiology provider in Durham, North Carolina, licensed in North Carolina (247761) and active in the NPI registry since April 2014. She is enrolled in Medicare PECOS, is affiliated with Duke University Hospital, and maintains a secondary practice location in Nashville.
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
Si Sandy An 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 Reassignments
2Medicare enrollment records show Si An 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
- 289 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 2
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, NCOther Providers at the Same Location NPPES 11
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Si An's NPI number?
The NPI number for Si An is 1609295591. It was assigned to this individual provider in the NPPES registry on April 8, 2014.
Where is Si An located?
Si An practices at Dumc 3094, Durham, NC 27710. The listed phone number is (919) 684-6633.
What is Si An's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Si An enrolled in Medicare?
Yes. Si An 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 Si An's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Si An reassigns Medicare benefits to 2 organizations: Regional Anesthesia, PLLC (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 Si An's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Si An accept?
Health plans from Cigna Healthcare list Si An 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 Si An affiliated with any hospitals?
According to CMS data, Si An is affiliated with Duke University Hospital.
When was this NPI record last updated?
The NPPES record for Si An was last updated on August 7, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.
# Si Sandy An, M.D. · NPI 1609295591
Anesthesiology physician in Durham, North Carolina. Individual provider, active in the CMS NPPES registry since April 8, 2014.
## Identity
- **NPI:** 1609295591 (Entity type: Individual)
- **Enumerated:** April 8, 2014
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** 247761 (North Carolina)
- **Sole proprietor:** Yes
## Practice location
- **Address:** DUMC 3094, Durham, NC 27710-0001
- **Phone:** (919) 684-6633
## 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): Regional Anesthesia, PLLC (NPI 1952486946, Durham, NC); Duke Health Integrated Practice, Inc (NPI 1518725936, Durham, NC) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Wake Forest University School Of Medicine, class of 2014
## Record status
- **NPPES last updated:** August 7, 2019
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Source: [NPI Profile](https://npiprofile.com/npi/1609295591) · Data from the CMS NPPES public registry.