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DONNA LETTIERI-MARKS, PSY.D., LTD
NPI 1649418518
Clinic/Center - Adult Mental Health in Naperville, IL

Active since January 29, 2009
55 S MAIN ST, SUITE 371, NAPERVILLE, IL 60540(630) 904-6610(630) 544-3429 Get Directions Write a Review

NPPES record last updated: January 29, 2009. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Donna Lettieri-marks, Psy.d., Ltd NPPES

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

DONNA LETTIERI-MARKS, PSY.D., LTD (NPI 1649418518) is a healthcare organization registered as an adult mental health in Naperville, Illinois and active in the NPI registry since January 2009. The organization lists Donna Lettieri-marks, Clinical Psychologist/owner, as its authorized official.

NPPES Registry Identity

NPI1649418518
Entity TypeOrganization
Primary Taxonomy261QM0850X
Legal Business NameDONNA LETTIERI-MARKS, PSY.D., LTD
Location Address55 S MAIN ST, SUITE 371Naperville, IL 60540-5372
Mailing Address55 S Main St, Suite 371Naperville, IL 60540-5372 · (630) 904-6610 · Fax (630) 544-3429
Phone(630) 904-6610
Fax(630) 544-3429
Organization SubpartNo
Authorized OfficialDonna Lettieri-marksClinical Psychologist/owner · (630) 904-6610
Enumeration DateJanuary 29, 2009
✔ NPI 1649418518 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyClinic/Center · Adult Mental HealthAmbulatory Health Care Facilities
Taxonomy Code261QM0850X
License✔ Licensed in IL · 071-005423
Definition
An entity, facility, or distinct part of a facility providing diagnostic, treatment, and prescriptive services related to mental and behavioral disorders in adults.
55 S MAIN ST, Naperville, IL 60540
Open in Google Maps ↗

Other Identifiers 2

Other357980IL · Medicare
Other1346233665Npi (individual Type I Number)

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Donna Lettieri-marks, Psy.d., Ltd is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Donna Lettieri-Marks, Psy.D., Ltd, which bills Medicare for the services this clinician delivers.

Clinician (1)

Donna Lettieri-Marks, PSY.D.
Clinical Psychologist
NPI 1346233665
55 S MAIN ST SUITE 371
Naperville, IL 60540
(630) 904-6610
✔ PECOS✔ Accepts MedicareSame address

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

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 Donna Lettieri-Marks, Psy.D., Ltd's NPI number?

The NPI number for Donna Lettieri-Marks, Psy.D., Ltd is 1649418518. It was assigned to this organization in the NPPES registry on January 29, 2009.

Where is Donna Lettieri-Marks, Psy.D., Ltd located?

Donna Lettieri-Marks, Psy.D., Ltd is located at 55 S Main St Suite 371, Naperville, IL 60540. The listed phone number is (630) 904-6610.

What is Donna Lettieri-Marks, Psy.D., Ltd's specialty?

The primary specialty registered for this NPI is Clinic/Center, specializing in Adult Mental Health, with taxonomy code 261QM0850X.

Is Donna Lettieri-Marks, Psy.D., Ltd enrolled in Medicare?

Yes. Donna Lettieri-Marks, Psy.D., Ltd is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Donna Lettieri-Marks, Psy.D., Ltd?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Clinical Psychologist) reassigns their Medicare billing to Donna Lettieri-Marks, Psy.D., Ltd. A 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 the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Donna Lettieri-Marks, Psy.D., Ltd was last updated on January 29, 2009. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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.