MARY BRYSON PIECHOWIAK MD
NPI 1033603824
Internal Medicine in Falls Church, VA
About Mary Bryson Piechowiak Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARY BRYSON PIECHOWIAK MD (NPI 1033603824) is an individual internal medicine provider in Falls Church, Virginia, licensed in California (A173484) and active in the NPI registry since June 2018. She is enrolled in Medicare PECOS, is affiliated with Inova Fairfax Hospital, and maintains a secondary practice location in Oxnard.
NPPES Registry Identity
Specialties & Licenses
Other Names 1
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
Mary Bryson Piechowiak 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 Mary Piechowiak reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Falls Church, VA 22042
- Reassigned Medicare billing, District of Columbia and Virginia enrollments
- Also billed through NPI 1588717755 (Virginia)
- 2,618 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 5
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 Fairfax Hospital
Acute Care Hospitals · Falls Church, VAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 22042 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.
FALLS CHURCH, VA 22042
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 Mary Piechowiak's NPI number?
The NPI number for Mary Piechowiak is 1033603824. It was assigned to this individual provider in the NPPES registry on June 15, 2018. The provider is also known as Mary Camille Bryson MD.
Where is Mary Piechowiak located?
Mary Piechowiak practices at 3300 Gallows Rd, Falls Church, VA 22042. The listed phone number is (703) 776-4001.
What is Mary Piechowiak's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Mary Piechowiak enrolled in Medicare?
Yes. Mary Piechowiak 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 Mary Piechowiak's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mary Piechowiak reassigns Medicare benefits to Inova Health Care Services (Falls Church, VA). 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 Mary Piechowiak's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mary Piechowiak accept?
Health plans from Oscar Health list Mary Piechowiak 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 Mary Piechowiak affiliated with any hospitals?
According to CMS data, Mary Piechowiak is affiliated with Inova Fairfax Hospital.
When was this NPI record last updated?
The NPPES record for Mary Piechowiak was last updated on March 24, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# Mary Bryson Piechowiak, MD · NPI 1033603824
Internal Medicine physician in Falls Church, Virginia. Individual provider, active in the CMS NPPES registry since June 15, 2018.
## Identity
- **NPI:** 1033603824 (Entity type: Individual)
- **Enumerated:** June 15, 2018
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** A173484 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 3300 GALLOWS RD, Falls Church, VA 22042-3307
- **Phone:** (703) 776-4001 · **Fax:** (703) 776-7113
## 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:** Inova Health Care Services (NPI 1952320061, Falls Church, VA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** George Washington University School Of Medicine, class of 2018
## Record status
- **NPPES last updated:** March 24, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1033603824) · Data from the CMS NPPES public registry.