MS. MACKENZIE SUE SOMMERHALDER PHD
NPI 1740735489
Psychologist in Baltimore, MD

Active since August 23, 2016PECOS Enrolled
1800 ORLEANS ST, BALTIMORE, MD 21287(410) 614-2401(410) 955-8691 Get Directions Write a Review

NPPES record last updated: May 25, 2022. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: May 25, 2022, Aug 23, 2016 (2 updates tracked since 2016).

About Ms. Mackenzie Sue Sommerhalder Phd NPPES

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

MS. MACKENZIE SUE SOMMERHALDER PHD (NPI 1740735489) is an individual psychologist in Baltimore, Maryland, licensed in Maryland (06284) and active in the NPI registry since August 2016. She is enrolled in Medicare PECOS and maintains a secondary practice location in Lincoln.

NPPES Registry Identity

NPI1740735489
Entity TypeIndividualFemale
Primary Taxonomy103T00000X
Provider Legal NameMS. MACKENZIE SUE SOMMERHALDERCredential: PHD
Location Address1800 ORLEANS STBaltimore, MD 21287-0010
Mailing Address6201 Greenleigh AveMiddle River, MD 21220-2004 · (410) 933-6423
Fax(410) 955-8691
Sole ProprietorNo
Enumeration DateAugust 23, 2016
Last NPPES UpdateMay 25, 20222 updates tracked since enumeration
NPPES CertifiedMay 25, 2022
✔ NPI 1740735489 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPsychologistBehavioral Health & Social Service Providers
Taxonomy Code103T00000X
License✔ Licensed in MD · 06284
Definition
A psychologist is an individual who is licensed to practice psychology which is defined as the observation, description, evaluation, interpretation, and modification of human behavior by the application of psychological principles, methods, and procedures, for the purpose of preventing or eliminating symptomatic, maladaptive, or undesired behavior and of enhancing interpersonal relationships, work and life adjustment, personal effectiveness, behavioral health, and mental health. The practice of psychology includes, but is not limited to, psychological testing and the evaluation or assessment of personal characteristics, such as intelligence, personality, abilities, interests, aptitudes, and neuropsychological functioning; counseling, psychoanalysis, psychotherapy, hypnosis, biofeedback, and behavior analysis and therapy; diagnosis and treatment of mental and emotional disorder or disability, alcoholism and substance abuse, disorders of habit or conduct, as well as of the psychological aspects of physical illness, accident, injury, or disability; and psycheducational evaluation, therapy, remediation, and consultation. Psychological services may be rendered to individuals, families, groups and the public.
Also ListedCounselor · Mental HealthTaxonomy 101YM0800X · License 10705 (NE)
1800 ORLEANS ST, Baltimore, MD 21287

Secondary Practice Location 1

Location 12444 O StLincoln, NE 68510-1125 · Phone (402) 475-7666 · Fax (402) 476-9623

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Ms. Mackenzie Sue Sommerhalder 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 Mackenzie Sommerhalder reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Critical Care Medicine
600 N WOLFE ST
Baltimore, MD 21287
  • Reassigned Medicare billing, Maryland enrollment
  • 4,483 clinicians in this Medicare group

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

Other Providers at the Same Location NPPES 20

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

Anesthesiology
1800 ORLEANS ST
BALTIMORE, MD 21287
Pediatrics
1800 ORLEANS ST
BALTIMORE, MD 21287
Internal Medicine (Gastroenterology)
1800 ORLEANS ST
BALTIMORE, MD 21287
Surgery (Trauma Surgery)
1800 ORLEANS ST
BALTIMORE, MD 21287
Radiology (Neuroradiology)
1800 ORLEANS ST
BALTIMORE, MD 21287
Physician Assistant
1800 ORLEANS ST
BALTIMORE, MD 21287
Student in an Organized Health Care Education/Training Program
1800 ORLEANS ST
BALTIMORE, MD 21287
Nurse Practitioner (Family)
1800 ORLEANS ST
BALTIMORE, MD 21287

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 Mackenzie Sommerhalder's NPI number?

The NPI number for Mackenzie Sommerhalder is 1740735489. It was assigned to this individual provider in the NPPES registry on August 23, 2016.

Where is Mackenzie Sommerhalder located?

Mackenzie Sommerhalder practices at 1800 Orleans St, Baltimore, MD 21287. The listed phone number is (410) 614-2401.

What is Mackenzie Sommerhalder's specialty?

The primary specialty registered for this NPI is Psychologist with taxonomy code 103T00000X.

Is Mackenzie Sommerhalder enrolled in Medicare?

Yes. Mackenzie Sommerhalder is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Mackenzie Sommerhalder's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mackenzie Sommerhalder reassigns Medicare benefits to Johns Hopkins University (Baltimore, 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 Mackenzie Sommerhalder'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 Mackenzie Sommerhalder was last updated on May 25, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years 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.