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DR. MARY KATHERINE GERRARD PHD
NPI 1538725452
Psychologist - Clinical in Columbia, MD

Active since May 16, 2019PECOS Enrolled
9810 PATUXENT WOODS DR STE F, COLUMBIA, MD 21046(443) 923-3871 Get Directions Write a Review

NPPES record last updated: June 4, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jun 4, 2025, May 16, 2019 (2 updates tracked since 2019).

About Dr. Mary Katherine Gerrard Phd NPPES

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

DR. MARY KATHERINE GERRARD PHD (NPI 1538725452) is an individual clinical provider in Columbia, Maryland, licensed in Maryland (07383) and active in the NPI registry since May 2019. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1538725452
Entity TypeIndividualFemale
Primary Taxonomy103TC0700X
Provider Legal NameDR. MARY KATHERINE GERRARDCredential: PHD
Location Address9810 PATUXENT WOODS DR STE FColumbia, MD 21046-1595
Mailing Address1211 S Conkling St Apt 356Baltimore, MD 21224-5346 · (513) 319-4889
Phone(443) 923-3871
Sole ProprietorNo
Enumeration DateMay 16, 2019
Last NPPES UpdateJune 4, 20252 updates tracked since enumeration
NPPES CertifiedJune 4, 2025
✔ NPI 1538725452 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPsychologist · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code103TC0700X
License✔ Licensed in MD · 07383
Definition
A psychologist who provides continuing and comprehensive mental and behavioral health care for individuals and families; consultation to agencies and communities; training, education and supervision; and research-based practice. It is a specialty in breadth -- one that is broadly inclusive of severe psychopathology -- and marked by comprehensiveness and integration of knowledge and skill from a broad array of disciplines within and outside of psychology proper. The scope of clinical psychology encompasses all ages, multiple diversities and varied systems.
Also ListedCase Manager/Care CoordinatorTaxonomy 171M00000X
9810 PATUXENT WOODS DR STE F, Columbia, MD 21046
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Mary Katherine Gerrard Phd is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment– Home Health Agency– Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Mary Gerrard reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Kennedy Krieger Associates
Same address
Pediatrics
9810 PATUXENT WOODS DR
Columbia, MD 21046
  • Reassigned Medicare billing, Maryland enrollment
  • 352 clinicians in this Medicare group
NPI 1609685692 (443) 923-3895

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 21046 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$183.44 typical visit price
range $60.73 – $183.44
Typical copayment $45.86 (range $15.18 – $45.86)
Most-billed visit code 99205
Established Patient
$106.59 typical visit price
range $19.60 – $149.17
Typical copayment $26.64 (range $4.90 – $37.29)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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 Gerrard's NPI number?

The NPI number for Mary Gerrard is 1538725452. It was assigned to this individual provider in the NPPES registry on May 16, 2019.

Where is Mary Gerrard located?

Mary Gerrard practices at 9810 Patuxent Woods Dr Ste F, Columbia, MD 21046. The listed phone number is (443) 923-3871.

What is Mary Gerrard's specialty?

The primary specialty registered for this NPI is Psychologist, specializing in Clinical, with taxonomy code 103TC0700X.

Is Mary Gerrard enrolled in Medicare?

Yes. Mary Gerrard is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Mary Gerrard's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mary Gerrard reassigns Medicare benefits to Kennedy Krieger Associates (Columbia, MD). 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 Mary Gerrard's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Mary Gerrard was last updated on June 4, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.