SAN THAW DAR AYE M.D
NPI 1598994089
Hospitalist in Leesburg, VA
About San Thaw Dar Aye M.d NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
SAN THAW DAR AYE M.D (NPI 1598994089) is an individual hospitalist provider in Leesburg, Virginia, licensed in Virginia (0101256433) and active in the NPI registry since July 2009. She is enrolled in Medicare PECOS, is affiliated with Inova Loudoun Hospital, and is a graduate of Other (2001).
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
San Thaw Dar Aye 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
3Medicare enrollment records show San Thaw Dar Aye reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Vienna, VA 22180
- Reassigned Medicare billing, Virginia enrollment
- 2,379 clinicians in this Medicare group
Frederick, MD 21701
- Reassigned Medicare billing, District of Columbia enrollment
- 204 clinicians in this Medicare group
Winchester, VA 22601
- Reassigned Medicare billing, District of Columbia enrollment
- 147 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.
Inova Loudoun Hospital
Acute Care Hospitals · Leesburg, VAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 20176 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Referred Medical Equipment & Supplies CMS DME claims 4
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.
LEESBURG, VA 20176
LEESBURG, VA 20176
LEESBURG, VA 20176
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 San Thaw Dar Aye's NPI number?
The NPI number for San Thaw Dar Aye is 1598994089. It was assigned to this individual provider in the NPPES registry on July 7, 2009.
Where is San Thaw Dar Aye located?
San Thaw Dar Aye practices at 44045 Riverside Pkwy, Leesburg, VA 20176. The listed phone number is (703) 858-6000.
What is San Thaw Dar Aye's specialty?
The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.
Is San Thaw Dar Aye enrolled in Medicare?
Yes. San Thaw Dar Aye 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 San Thaw Dar Aye's services?
According to the CMS Revalidation Reassignment List (October 2026 release), San Thaw Dar Aye reassigns Medicare benefits to 3 organizations: Inova Health Care Services (Vienna, VA), Hospitalist Medicine Physicians Of Maryland PC (Frederick, MD) and Hospitalist Medicine Physicians Of Virginia LLC (Winchester, VA). 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 San Thaw Dar Aye's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does San Thaw Dar Aye accept?
Health plans from Oscar Health list San Thaw Dar Aye 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 San Thaw Dar Aye affiliated with any hospitals?
According to CMS data, San Thaw Dar Aye is affiliated with Inova Loudoun Hospital.
When was this NPI record last updated?
The NPPES record for San Thaw Dar Aye was last updated on December 4, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.
# San Thaw Dar Aye, M.D · NPI 1598994089
Hospitalist physician in Leesburg, Virginia. Individual provider, active in the CMS NPPES registry since July 7, 2009.
## Identity
- **NPI:** 1598994089 (Entity type: Individual)
- **Enumerated:** July 7, 2009
- **Primary specialty:** Hospitalist · taxonomy 208M00000X
- **State license:** 0101256433 (Virginia)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 44045 RIVERSIDE PKWY, Leesburg, VA 20176-5101
- **Phone:** (703) 858-6000 · **Fax:** (703) 858-6900
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Inova Health Care Services (NPI 1275886418, Vienna, VA); Hospitalist Medicine Physicians Of Maryland PC (NPI 1992945471, Frederick, MD); Hospitalist Medicine Physicians Of Virginia LLC (NPI 1770756991, Winchester, VA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2001
## Record status
- **NPPES last updated:** December 4, 2020
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Source: [NPI Profile](https://npiprofile.com/npi/1598994089) · Data from the CMS NPPES public registry.