DR. STEPHANIE J WILLIAMS MD
NPI 1467664649
Obstetrics & Gynecology in Arlington, VA
About Dr. Stephanie J Williams Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. STEPHANIE J WILLIAMS MD (NPI 1467664649) is an individual obstetrics & gynecology provider in Arlington, Virginia, licensed in Virginia (0101248227) and active in the NPI registry since May 2007. She is enrolled in Medicare PECOS, is affiliated with Inova Alexandria Hospital, and maintains 4 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 4
Other Identifiers 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. Stephanie J Williams 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 Stephanie Williams 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 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 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Inova Alexandria Hospital
Acute Care Hospitals · Alexandria, VAInova Mount Vernon Hospital
Acute Care Hospitals · Alexandria, VAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 22206 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.
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 Stephanie Williams's NPI number?
The NPI number for Stephanie Williams is 1467664649. It was assigned to this individual provider in the NPPES registry on May 3, 2007.
Where is Stephanie Williams located?
Stephanie Williams practices at 2800 S Shirlington Rd Ste 706A, Arlington, VA 22206. The listed phone number is (571) 777-2420.
What is Stephanie Williams's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.
Is Stephanie Williams enrolled in Medicare?
Yes. Stephanie Williams 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 Stephanie Williams's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Stephanie Williams 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 Stephanie Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Stephanie Williams accept?
Health plans from Oscar Health list Stephanie Williams 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 Stephanie Williams affiliated with any hospitals?
According to CMS data, Stephanie Williams is affiliated with Inova Alexandria Hospital and Inova Mount Vernon Hospital.
When was this NPI record last updated?
The NPPES record for Stephanie Williams was last updated on July 23, 2021. 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.
# Dr. Stephanie J Williams, MD · NPI 1467664649
Obstetrics & Gynecology physician in Arlington, Virginia. Individual provider, active in the CMS NPPES registry since May 3, 2007.
## Identity
- **NPI:** 1467664649 (Entity type: Individual)
- **Enumerated:** May 3, 2007
- **Primary specialty:** Obstetrics & Gynecology · taxonomy 207V00000X
- **State license:** 0101248227 (Virginia)
- **Sole proprietor:** No
## Practice location
- **Address:** 2800 S SHIRLINGTON RD STE 706A, Arlington, VA 22206-3601
- **Phone:** (571) 777-2420 · **Fax:** (571) 777-2421
## 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:** Loma Linda University School Of Medicine, class of 2004
## Record status
- **NPPES last updated:** July 23, 2021
- **Other identifiers:** Medicaid 1467664649 (VA)
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Source: [NPI Profile](https://npiprofile.com/npi/1467664649) · Data from the CMS NPPES public registry.