DR. ANDREW SHICHEN SUN MD
NPI 1699235473
Internal Medicine - Cardiovascular Disease in Austin, TX
About Dr. Andrew Shichen Sun Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ANDREW SHICHEN SUN MD (NPI 1699235473) is an individual cardiovascular disease provider in Austin, Texas, licensed in Texas (T6725) and active in the NPI registry since March 2019. He is enrolled in Medicare PECOS, is affiliated with Chi St Luke's Health Baylor College Of Medicine Me, and maintains a secondary practice location in Houston.
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. Andrew Shichen Sun 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 Reassignment
Medicare enrollment records show Andrew Sun reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Austin, TX 78756
- Reassigned Medicare billing, Texas enrollment
- 197 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.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Chi St Luke's Health Baylor College Of Medicine Me
Acute Care Hospitals · Houston, TXSt David's South Austin Medical Center
Acute Care Hospitals · Austin, TXPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 78745 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
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 Andrew Sun's NPI number?
The NPI number for Andrew Sun is 1699235473. It was assigned to this individual provider in the NPPES registry on March 20, 2019.
Where is Andrew Sun located?
Andrew Sun practices at 4316 James Casey St. Bldg A, C, E, Austin, TX 78745. The listed phone number is (512) 623-5300.
What is Andrew Sun's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.
Is Andrew Sun enrolled in Medicare?
Yes. Andrew Sun 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 Andrew Sun's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Andrew Sun reassigns Medicare benefits to St Davids Heart & Vascular, PLLC (Austin, TX). 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 Andrew Sun's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Andrew Sun accept?
Health plans from Ambetter Health, Ambetter from Arizona Complete Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections and Ambetter from Superior HealthPlan and 5 other insurers list Andrew Sun 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 Andrew Sun affiliated with any hospitals?
According to CMS data, Andrew Sun is affiliated with Chi St Luke's Health Baylor College Of Medicine Me and St David's South Austin Medical Center.
When was this NPI record last updated?
The NPPES record for Andrew Sun was last updated on June 12, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 months 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. Andrew Shichen Sun, MD · NPI 1699235473
Cardiovascular Disease physician in Austin, Texas. Individual provider, active in the CMS NPPES registry since March 20, 2019.
## Identity
- **NPI:** 1699235473 (Entity type: Individual)
- **Enumerated:** March 20, 2019
- **Primary specialty:** Internal Medicine - Cardiovascular Disease · taxonomy 207RC0000X
- **State license:** T6725 (Texas)
- **Sole proprietor:** No
## Practice location
- **Address:** 4316 JAMES CASEY ST., BLDG A, C, E, Austin, TX 78745
- **Phone:** (512) 623-5300 · **Fax:** (512) 623-5399
## 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:** St Davids Heart & Vascular, PLLC (NPI 1700887700, Austin, TX), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2019
## Record status
- **NPPES last updated:** June 12, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1699235473) · Data from the CMS NPPES public registry.