MRS. MARY ELLEN ZATOR ESTES NP
NPI 1447427000
Nurse Practitioner in Fairfax, VA
About Mrs. Mary Ellen Zator Estes Np NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MRS. MARY ELLEN ZATOR ESTES NP (NPI 1447427000) is an individual nurse practitioner in Fairfax, Virginia, licensed in Virginia (0024164568) and active in the NPI registry since May 2008. She is enrolled in Medicare PECOS and is a graduate of Other (2000).
NPPES Registry Identity
Specialties & Licenses
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
Mrs. Mary Ellen Zator Estes Np 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 Ellen Estes reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Arlington, VA 22203
- Reassigned Medicare billing, District of Columbia and Virginia enrollments
- 1,534 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
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 22033 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.
Reported Quality Measures
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.
FAIRFAX, VA 22033
FAIRFAX, VA 22033
FAIRFAX, VA 22033
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 Ellen Estes's NPI number?
The NPI number for Mary Ellen Estes is 1447427000. It was assigned to this individual provider in the NPPES registry on May 13, 2008.
Where is Mary Ellen Estes located?
Mary Ellen Estes practices at 3620 Joseph Siewick Dr Suite 306, Fairfax, VA 22033. The listed phone number is (703) 264-0521.
What is Mary Ellen Estes's specialty?
The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.
Is Mary Ellen Estes enrolled in Medicare?
Yes. Mary Ellen Estes 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 Ellen Estes's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mary Ellen Estes reassigns Medicare benefits to Privia Medical Group, LLC (Arlington, 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 Ellen Estes's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Mary Ellen Estes was last updated on August 27, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.
# Mrs. Mary Ellen Zator Estes, NP · NPI 1447427000
Nurse Practitioner physician in Fairfax, Virginia. Individual provider, active in the CMS NPPES registry since May 13, 2008.
## Identity
- **NPI:** 1447427000 (Entity type: Individual)
- **Enumerated:** May 13, 2008
- **Primary specialty:** Nurse Practitioner · taxonomy 363L00000X
- **State license:** 0024164568 (Virginia)
- **Sole proprietor:** No
## Practice location
- **Address:** 3620 JOSEPH SIEWICK DR, SUITE 306, Fairfax, VA 22033-1756
- **Phone:** (703) 264-0521 · **Fax:** (703) 860-0229
## 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:** Privia Medical Group, LLC (NPI 1013042480, Arlington, VA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2000
## Record status
- **NPPES last updated:** August 27, 2013
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Source: [NPI Profile](https://npiprofile.com/npi/1447427000) · Data from the CMS NPPES public registry.