DR. DONNA LETTIERI-MARKS PSY.D.
NPI 1346233665
Psychologist - Clinical in Naperville, IL

Q: What is Donna Lettieri-marks's NPI number?

The NPI number for Donna Lettieri-marks is 1346233665. It was assigned to this individual provider in the NPPES registry on August 23, 2005.

Q: What is Donna Lettieri-marks's specialty?

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

Active since August 23, 2005PECOS EnrolledAccepts Medicare Assignment

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

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

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About Dr. Donna Lettieri-marks Psy.d. NPPES

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

DR. DONNA LETTIERI-MARKS PSY.D. (NPI 1346233665) is an individual clinical provider in Naperville, Illinois and active in the NPI registry since August 2005. She is enrolled in Medicare PECOS and is a graduate of Other (1995).

NPPES Registry Identity

NPI1346233665

Entity TypeIndividualFemale

Primary Taxonomy103TC0700X

Provider Legal NameDR. DONNA LETTIERI-MARKSCredential: PSY.D.

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

Sole ProprietorNo

Medical School CMSOtherGraduated 1995

Enumeration DateAugust 23, 2005

Last NPPES UpdateJuly 13, 2026

✔ NPI 1346233665 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychologist · ClinicalBehavioral Health & Social Service Providers

Taxonomy Code103TC0700X

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.

55 S MAIN ST, Naperville, IL 60540

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Other Identifiers 1

Other50521National Register

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. Donna Lettieri-marks Psy.d. 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 ID3476577644

PECOS Enrollment IDI20060116000314

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 Donna Lettieri-marks reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Donna Lettieri-Marks, Psy.D., Ltd

Same address

Adult Mental Health

55 S MAIN ST, SUITE 371
Naperville, IL 60540

Reassigned Medicare billing, Illinois enrollment

NPI 1649418518 (630) 904-6610

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 60540 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 11

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

IRENE JOVICIC D.M.D.

Dentist (General Practice)

55 S MAIN ST, SUITE 241
NAPERVILLE, IL 60540

Dupage County (630) 848-2010

DESIGNDENTAL

Dentist

55 S MAIN ST, SUITE 290
NAPERVILLE, IL 60540

Dupage County (630) 357-3333

NAPERVILLE DENTAL SPECIALISTS AND GENERAL ORAL HEALTH CARE

Dentist

55 S MAIN ST, SUITE 241
NAPERVILLE, IL 60540

Dupage County (630) 848-2010

STACEY A CLINE DC S.C.

Clinic/Center

55 S MAIN ST, SUITE 294
NAPERVILLE, IL 60540

Dupage County (630) 428-2000

DR. LIDIA B ICKES DDS

Dentist (General Practice)

55 S MAIN ST, SUITE 241
NAPERVILLE, IL 60540

Dupage County (630) 848-2010

DR. CHIANN FAN GIBSON DMD

Dentist

55 S MAIN ST, SUITE 290
NAPERVILLE, IL 60540

Dupage County (630) 357-3333

DONNA LETTIERI-MARKS, PSY.D., LTD

Clinic/Center (Adult Mental Health)

55 S MAIN ST, SUITE 371
NAPERVILLE, IL 60540

Dupage County (630) 904-6610

DR. MARY WERLE BELL PH.D.

Psychologist (Clinical)

55 S MAIN ST
NAPERVILLE, IL 60540

Dupage County (888) 428-7890

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's NPI number?

The NPI number for Donna Lettieri-marks is 1346233665. It was assigned to this individual provider in the NPPES registry on August 23, 2005.

Where is Donna Lettieri-marks located?

Donna Lettieri-marks practices at 55 S Main St Suite 371, Naperville, IL 60540. The listed phone number is (630) 904-6610.

What is Donna Lettieri-marks's specialty?

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

Is Donna Lettieri-marks enrolled in Medicare?

Yes. Donna Lettieri-marks 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 organization bills Medicare for Donna Lettieri-marks's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Donna Lettieri-marks reassigns Medicare benefits to Donna Lettieri-Marks, Psy.D., Ltd (Naperville, IL). 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 Donna Lettieri-marks'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 Donna Lettieri-marks was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.