Mary Hill, PH.D.
NPI 1285948042 · Psychologist · Fairfax, VA
Enrolled with Medicare as Practitioner - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Hill, PH.D. is a Psychologist provider in Fairfax, VA (NPI 1285948042).
Provider details
- NPI number
- 1285948042
- Entity type
- Individual
- Primary specialty
- PsychologistBehavioral Health & Social Service Providers
- Credential
- PH.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 0810004213 (VA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
15 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
12 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
215 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Psychotherapy, 45 Minutes90834 | 215 | $100 |
Typical Medicare-allowed amounts for these services range $100–$100 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Additional practice locations (11)
- 2501 Parkers LnAlexandria, VA 22306-3209Phone: (703) 664-7000Fax: (703) 664-7666
- 4320 Seminary RdAlexandria, VA 22304-1535Phone: (703) 504-3000Fax: (703) 504-3388
- 3600 Joseph Siewick DrFairfax, VA 22033-1709Phone: (703) 391-3600Fax: (703) 391-3414
- 8221 Willow Oaks Corporate Dr Ste 4-430Fairfax, VA 22031-4512Phone: (703) 289-7560Fax: (703) 289-4612
- 8221 Willow Oaks Corporate Dr Ste 4-430Fairfax, VA 22031-4512Phone: (703) 289-7560Fax: (703) 289-4613
- 8221 Willow Oaks Corporate Dr Ste 4-425Fairfax, VA 22031-4512Phone: (703) 289-7560Fax: (703) 289-4612
- 8221 Willow Oaks Corporate Dr Ste 4-435Fairfax, VA 22031-4512Phone: (703) 289-7560Fax: (703) 289-4612
Registry dates
- Enumerated
- 2010-08-03
- Last updated
- 2022-11-10
- Certified
- 2022-11-10
Frequently asked questions
- What is Mary Hill's NPI number?
- Mary Hill's National Provider Identifier (NPI) is 1285948042, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Hill's specialty?
- Mary Hill is listed in the NPPES registry with a primary specialty of Psychologist (Behavioral Health & Social Service Providers).
- Where is Mary Hill located?
- Mary Hill's practice location on file with NPPES is 8081 Innovation Park Dr Ste 604, Fairfax, VA 22031-4867.
- What is Mary Hill's phone number?
- The practice phone number listed in the NPPES registry for Mary Hill is (571) 472-6880.
- Does Mary Hill accept Medicare?
- Mary Hill is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Hill's NPI active?
- Yes — Mary Hill's NPI (1285948042) is active in the NPPES registry as of the last update on 2022-11-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.