Mary Kathleen Hill, PH.D.
Psychologist · Fairfax, VA
At a glance
8081 Innovation Park Dr Ste 604, Fairfax, VA 22031-4867
NPPES record updated Nov 10, 2022. Public records can lag behind changes at a practice.
Before you call: a quick checklist
- Are you accepting new patients?
- Do you accept my specific insurance plan?
- Do you provide the service I need at this address?
- Do I need a referral, and what is the earliest appointment?
Insurance participation and appointment availability are not established by these public records.
Medicare & insurance
Insurance participation is not established by these public records. Ask the practice and your insurer about your specific plan and this location.
How to check your coverage
Use your plan’s provider directory or the member-services number on your insurance card. Confirm the clinician, practice address, service, and whether a referral is required. A missing opt-out record does not establish Medicare acceptance.
Check the official Medicare directory ↗Practice location
8081 Innovation Park Dr Ste 604Fairfax, VA 22031-4867
Additional reported practice locations
8221 Willow Oaks Corporate Dr Ste 4-420Fairfax, VA 220314512
Phone: 7032897560
Fax: 7032049001 4320 Seminary Rd
Alexandria, VA 223041535
Phone: 7035043000
Fax: 7035043388 3600 Joseph Siewick Dr
Fairfax, VA 220331709
Phone: 7033913600
Fax: 7033913414 3300 Gallows Rd
Falls Church, VA 220423300
Phone: 7037764001
Fax: 7037767113 44045 Riverside Pkwy
Leesburg, VA 201765101
Phone: 7038586000
Fax: 7038586900 8221 Willow Oaks Corporate Dr Ste 4-435
Fairfax, VA 220314512
Phone: 7032897560
Fax: 7032894612 2501 Parkers Ln
Alexandria, VA 223063209
Phone: 7036647000
Fax: 7036647666 8221 Willow Oaks Corporate Dr Ste 4-430
Fairfax, VA 220314512
Phone: 7032897560
Fax: 7032894612 224 Cornwall St Nw
Leesburg, VA 201762701
Phone: 7037712894
Fax: 7037795429 8221 Willow Oaks Corporate Dr Ste 4-430
Fairfax, VA 220314512
Phone: 7032897560
Fax: 7032894613 8221 Willow Oaks Corporate Dr Ste 4-425
Fairfax, VA 220314512
Phone: 7032897560
Fax: 7032894612
Education & affiliations
- Medical / professional school
- Not reported in this file
- Graduation year
- 2008
- CMS specialties
- Clinical Psychologist
CMS reports telehealth services for this clinician. Confirm current services and availability with the practice.
Practice groups
Reported hospital affiliations
- Inova Fairfax Hospital Falls Church, VA
Graduation year does not establish years in practice. A reported affiliation does not establish employment, current admitting privileges, or insurance participation.
Source: CMS National Downloadable File · Published Oct 15, 2026.
Source: CMS Facility Affiliation Data · Published Oct 15, 2026.
Procedures in the public data
Reported activity can help you ask more informed questions about a practice’s services.
No displayed procedure-category record in this release. This does not mean the clinician performs no procedures.
CMS uses a one-year claims window with a reporting lag. Counts cover the Medicare activity included by CMS, not all patients. “1–10” is a published range. Volume is not a quality or outcomes score. Coverage and methodology
Source: CMS Utilization Data · Published Oct 15, 2026.
Find providers with a similar service mix
Compare 2024 published Medicare activity in the same reported specialty, here or in another city.
Industry-reported general payments
No matching general-payment summary in the imported release. This is not a verified zero and does not rule out other payment types or years.
Source: CMS 2025 payments grouped by covered recipient and nature of payments · Published Jun 30, 2026.
Professional details: NPI, taxonomy & registry record
Registry details
- Primary taxonomy
- Psychologist
- Taxonomy code
- 103T00000X
- Enumeration date
- Aug 3, 2010
- Record updated
- Nov 10, 2022
More registry details
- Provider type
- Individual · Type 1
- Reported credentials
- PH.D.
Reported taxonomies and licenses
103TC0700X
License reported: 0810004213 VA
103T00000X · Primary
License reported: 0810004213 VA
License numbers and credentials are reported to NPPES; HCPList does not independently verify them.
Practice location
8081 Innovation Park Dr Ste 604Fairfax, VA 22031-4867
- Phone
- (571) 472-6880
- Fax
- (571) 665-6850
Mailing address
8081 INNOVATION PARK DR STE 604FAIRFAX, VA 220314867
Information may be outdated or incomplete. Confirm details directly with the practice. HCPList is an independent directory and is not affiliated with CMS.
Report a directory issue