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DR. DEIDRE MCAULIFFE ALEXANDER PSYD
NPI 1851405807
Psychologist - Clinical in Oak Brook, IL

Active since August 18, 2006PECOS EnrolledAccepts Medicare Assignment
1000 JORIE BLVD STE 119, OAK BROOK, IL 60523(630) 309-2989(630) 790-3804 Get Directions Write a Review

NPPES record last updated: October 3, 2018. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. Deidre Mcauliffe Alexander Psyd NPPES

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

DR. DEIDRE MCAULIFFE ALEXANDER PSYD (NPI 1851405807) is an individual clinical provider in Oak Brook, Illinois, licensed in Illinois (071.008341) and active in the NPI registry since August 2006. She is enrolled in Medicare PECOS and is a graduate of Other (2003).

NPPES Registry Identity

NPI1851405807
Entity TypeIndividualFemale
Primary Taxonomy103TC0700X
Provider Legal NameDR. DEIDRE MCAULIFFE ALEXANDERCredential: PSYD
Location Address1000 JORIE BLVD STE 119Oak Brook, IL 60523-4463
Mailing Address1000 Jorie Blvd Ste 119Oak Brook, IL 60523-4463 · (630) 309-2989 · Fax (630) 790-3804
Phone(630) 309-2989
Fax(630) 790-3804
Sole ProprietorNo
Medical School CMSOtherGraduated 2003
Enumeration DateAugust 18, 2006
Last NPPES UpdateOctober 3, 2018
✔ NPI 1851405807 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 IL · 071.008341
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 ListedCounselor · ProfessionalTaxonomy 101YP2500X · License 180000867 (IL)
1000 JORIE BLVD STE 119, Oak Brook, IL 60523
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Health.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Deidre Mcauliffe Alexander Psyd is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID5991951931
PECOS Enrollment IDI20120808000150
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 Reassignments

2

Medicare enrollment records show Deidre Alexander reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Deidre Alexander Psyd Sc
Same address
Clinical
1000 JORIE BLVD STE 119
Oak Brook, IL 60523
  • Reassigned Medicare billing, Illinois enrollment
NPI 1528325438 (630) 309-2989
Amer & Associates Sc
10 mi
Psychiatry
121 FAIRFIELD WAY, 240
Bloomingdale, IL 60108
  • Reassigned Medicare billing, Illinois enrollment
  • 2 clinicians in this Medicare group
NPI 1366507071 (630) 351-1770

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

Areas of Expertise CMS Part B claims 2

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Psychotherapy, 30 minutes 90832
Psychotherapy is a therapeutic interaction or treatment between a trained professional and a patient. In a 30-minute session, the therapist helps you explore feelings, thoughts, and behaviors to better understand yourself and manage life's challenges.
679 services110 patients
Psychotherapy, 45 minutes 90834
Psychotherapy is a treatment method where you converse with a therapist about your thoughts, feelings, and behaviors. In a 45-minute session, the therapist assists you in understanding and managing your mental health concerns, improving emotional wellness, and promoting personal growth.
145 services22 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60523 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
$181.38 typical visit price
range $59.81 – $181.38
Typical copayment $45.34 (range $14.95 – $45.34)
Most-billed visit code 99205
Established Patient
$105.07 typical visit price
range $19.15 – $147.12
Typical copayment $26.26 (range $4.78 – $36.78)
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.

Other Providers at the Same Location NPPES

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

DEIDRE ALEXANDER PSYD SC
Psychologist (Clinical)
1000 JORIE BLVD STE 119
OAK BROOK, IL 60523
Dupage County (630) 309-2989

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 Deidre Alexander's NPI number?

The NPI number for Deidre Alexander is 1851405807. It was assigned to this individual provider in the NPPES registry on August 18, 2006.

Where is Deidre Alexander located?

Deidre Alexander practices at 1000 Jorie Blvd Ste 119, Oak Brook, IL 60523. The listed phone number is (630) 309-2989.

What is Deidre Alexander's specialty?

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

Is Deidre Alexander enrolled in Medicare?

Yes. Deidre Alexander is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Deidre Alexander's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Deidre Alexander reassigns Medicare benefits to 2 organizations: Deidre Alexander Psyd Sc (Oak Brook, IL) and Amer & Associates Sc (Bloomingdale, IL). Each 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 Deidre Alexander's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Deidre Alexander accept?

Health plans from Oscar Health list Deidre Alexander as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Deidre Alexander was last updated on October 3, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.