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.

IndividualActiveAccepts Medicare

Mary Hill, PH.D.

NPI 1285948042 · Psychologist · Fairfax, VA

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)

Practice location

8081 Innovation Park Dr Ste 604

Fairfax, VA 22031-4867

Phone: (571) 472-6880

Fax: (571) 665-6850

Approximate (ZIP-level) locationGet directions

More VA providers

Mailing address

8081 Innovation Park Dr Ste 604

Fairfax, VA 22031-4867

Specialties & taxonomies

PsychologistPrimary103T00000XLicense 0810004213 (VA)
Behavioral Health & Social Service Providers
Clinical Psychologist103TC0700XLicense 0810004213 (VA)
Behavioral Health & Social Service Providers

Additional practice locations (11)

2501 Parkers Ln
Alexandria, VA 22306-3209
Phone: (703) 664-7000
Fax: (703) 664-7666
4320 Seminary Rd
Alexandria, VA 22304-1535
Phone: (703) 504-3000
Fax: (703) 504-3388
3600 Joseph Siewick Dr
Fairfax, VA 22033-1709
Phone: (703) 391-3600
Fax: (703) 391-3414
8221 Willow Oaks Corporate Dr Ste 4-430
Fairfax, VA 22031-4512
Phone: (703) 289-7560
Fax: (703) 289-4612
8221 Willow Oaks Corporate Dr Ste 4-430
Fairfax, VA 22031-4512
Phone: (703) 289-7560
Fax: (703) 289-4613
8221 Willow Oaks Corporate Dr Ste 4-425
Fairfax, VA 22031-4512
Phone: (703) 289-7560
Fax: (703) 289-4612
8221 Willow Oaks Corporate Dr Ste 4-435
Fairfax, VA 22031-4512
Phone: (703) 289-7560
Fax: (703) 289-4612
8221 Willow Oaks Corporate Dr Ste 4-420
Fairfax, VA 22031-4512
Phone: (703) 289-7560
Fax: (703) 204-9001
3300 Gallows Rd
Falls Church, VA 22042-3300
Phone: (703) 776-4001
Fax: (703) 776-7113
44045 Riverside Pkwy
Leesburg, VA 20176-5101
Phone: (703) 858-6000
Fax: (703) 858-6900
224 Cornwall St Nw
Leesburg, VA 20176-2701
Phone: (703) 771-2894
Fax: (703) 779-5429

Enrolled with Medicare as Practitioner - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)

Profile Score

Established profile(74/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure28% of score
16 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.

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.

Provider details

Practice location

Mailing address

Specialties & taxonomies

Additional practice locations (11)

Profile Score

What this provider does (Medicare)

Registry dates

Frequently asked questions

Specialties & taxonomies

Additional practice locations (11)

Frequently asked questions

Profile Score

What this provider does (Medicare)