DR. MARY DARLENE HILL PH.D.
NPI 1164574984
Psychologist - Group Psychotherapy in Bel Air, MD

Q: What is Mary Hill's NPI number?

The NPI number for Mary Hill is 1164574984. It was assigned to this individual provider in the NPPES registry on January 18, 2007.

Q: What is Mary Hill's specialty?

The primary specialty registered for this NPI is Psychologist, specializing in Group Psychotherapy, with taxonomy code 103TP2701X.

Q: Is Mary Hill enrolled in Medicare?

No. Mary Hill has opted out of Medicare through July 1, 2028. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out. The provider remains eligible to order and refer services for Medicare patients.

Q: When was this NPI record last updated?

The NPPES record for Mary Hill was last updated on September 11, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 months 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.

Active since January 18, 2007Opted out of Medicare · through Jul 1, 2028

115 FULFORD AVE, BEL AIR, MD 21014(410) 893-3082 Get Directions Write a Review

NPPES record last updated: September 11, 2025. Verified against the NPPES registry weekly; last sync: September 13, 2026.

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About Dr. Mary Darlene Hill Ph.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. MARY DARLENE HILL PH.D. (NPI 1164574984) is an individual group psychotherapy provider in Bel Air, Maryland, licensed in Maryland (3724) and active in the NPI registry since January 2007. She has opted out of Medicare through July 1, 2028 and remains eligible to order and refer.

NPPES Registry Identity

NPI1164574984

Entity TypeIndividualFemale

Primary Taxonomy103TP2701X

Provider Legal NameDR. MARY DARLENE HILLCredential: PH.D.

Location Address115 FULFORD AVEBel Air, MD 21014-3851

Mailing Address10722 Cordage WalkColumbia, MD 21044-3641 · (410) 992-9468

Phone(410) 893-3082

Sole ProprietorYes

Enumeration DateJanuary 18, 2007

Last NPPES UpdateSeptember 11, 2025

✔ NPI 1164574984 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 4

★ Primary SpecialtyPsychologist · Group PsychotherapyBehavioral Health & Social Service Providers

Taxonomy Code103TP2701X

License✔ Licensed in MD · 3724

Definition

A psychologist who specializes in group psychology and group psychotherapy that is an evidenced-based specialty that prepares group leaders to identify and capitalize on developmental and healing possibilities embedded in the interpersonal/intrapersonal functioning of individual group members as well as collectively for the group. Emphasis is placed on the use of group dynamics to assist and treat individual group members. The specialty is applicable to all age groups, children, adolescents, adults and older adults, for a wide variety of conditions and concerns, and in numerous and diverse settings.

Also ListedPsychologistTaxonomy 103T00000X · License 3724 (MD)

Also ListedPsychologist · ClinicalTaxonomy 103TC0700X · License 3724 (MD)

Also ListedPsychologist · Clinical Child & AdolescentTaxonomy 103TC2200X · License 3724 (MD)

115 FULFORD AVE, Bel Air, MD 21014

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Other Identifiers 2

OtherJ206-0001MD · Carefirst

Other156AHUMD · Carefirst

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

ⓘ

Opted out of Medicare

Dr. Mary Darlene Hill Ph.d. has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from July 1, 2016 through July 1, 2028.

Opt-Out Effective DateJuly 1, 2016

Opt-Out In Effect ThroughJuly 1, 2028Opt-out affidavits renew automatically every two years unless cancelled

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment– Home Health Agency– Power Mobility DevicesAn opted-out provider can still order and refer for Medicare patients in the categories marked above, even though their own services are not covered.

Other Providers at the Same Location NPPES 2

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

SANDOR SZOLLOS PH.D.

Psychologist (Clinical)

115 FULFORD AVE
BEL AIR, MD 21014

Harford County (410) 893-3082

HUMAN DEVELOPMENT CENTER

Clinic/Center (Mental Health (Including Community Mental Health Center))

115 FULFORD AVE
BEL AIR, MD 21014

Harford County (410) 893-3082

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 Hill's NPI number?

The NPI number for Mary Hill is 1164574984. It was assigned to this individual provider in the NPPES registry on January 18, 2007.

Where is Mary Hill located?

Mary Hill practices at 115 Fulford Ave, Bel Air, MD 21014. The listed phone number is (410) 893-3082.

What is Mary Hill's specialty?

The primary specialty registered for this NPI is Psychologist, specializing in Group Psychotherapy, with taxonomy code 103TP2701X.

Is Mary Hill enrolled in Medicare?

No. Mary Hill has opted out of Medicare through July 1, 2028. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out. The provider remains eligible to order and refer services for Medicare patients.

When was this NPI record last updated?

The NPPES record for Mary Hill was last updated on September 11, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 months 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.