Psychologist | Clinical Psychology | 31+ years experience

Dr. Donna Lettieri-marks, PSY.D.

55 S Main St, Suite 371, Naperville, Illinois, 60540-5372

About Dr. Donna Lettieri-marks

Dr. Donna Lettieri-marks is a psychologist based in Naperville, Illinois with 31 years of experience in Clinical Psychology. She completed her graduation in 1995. She accepts the Medicare-approved amount. Patients will not be billed for any more than the Medicare deductible and coinsurance. Her current practice location is 55 S Main St, Suite 371, Naperville. Patients can contact her at 630-904-6610 or can fax her at 630-544-3429. Dr. Donna Lettieri-marks, PSY.D., specializes in Clinical Psychology and her NPI number (Unique professional ID assigned by NPPES) is 1346233665.

Dr. Donna Lettieri-marks is a mental health professional with highly specialized training in the diagnosis and psychological treatment of mental, behavioral and emotional illnesses, including obsessive-compulsive disorder (OCD). Her main focus is on diagnosing and treating mental, emotional, and behavioral disorders. Some of the common disorders that she can treat are learning disabilities, substance abuse, depression, anxiety, and eating disorders.

Practice Information

Dr. Donna Lettieri-marks's specialty, credentials, practice address, contact phone number and fax are as below. Patients can call on the below given phone number for appointment.

Provider Name Dr. Donna Lettieri-marks
Specialization Clinical Psychology
Credentials PSY.D.
Accepts Medicare Assignment Yes
Experience 31+ years
Graduation Year 1995
Gender Female
Practice Address: 55 S Main St, Suite 371
Naperville, IL - 60540-5372
Fax 630-544-3429

Professional Identification Codes

NPI number stands for National Provider Identifier which is a unique 10-digit identification number issued to healthcare providers in the United States by the Centers for Medicare and Medicaid Services (CMS). NPI details are as mentioned below.

PAC ID 3476577644
Enrollment ID I20060116000314
NPI Number1346233665
NPI Enumeration Date: 23 Aug, 2005
NPI Last Update On: 13 Jul, 2026

Medical Licenses:

Healthcare professionals can hold one or more medical licenses for different specialties in the same state or different states. Related medical licenses for Dr. Donna Lettieri-marks are as mentioned below.

License NumberSpecializationStateStatus
Clinical Psychology IllinoisPrimary

Other Medical Identifiers

Other professional identifiers associated with Dr. Donna Lettieri-marks such as Medicaid, Medicare PIN, NSC, UPIN etc. are mentioned as below.
IdentifierTypeStateIssuer
50521OtherNATIONAL REGISTER

Mailing Address

Business mailing address can be used for mailing purpose only, for visiting purpose patients need to refer above mentioned Practice address.

Dr. Donna Lettieri-marks
55 S Main St, Suite 371
Naperville, IL - 60540-5372
Phone: 630-904-6610
Fax: 630-544-3429

Book an Appointment with Dr. Donna Lettieri-marks

To schedule an appointment, contact Dr. Donna Lettieri-marks at 55 S Main St, Suite 371, Naperville, Illinois or call the phone number listed below.

Book an Appointment

Frequently Asked Questions

Below are some commonly asked questions about Dr. Donna Lettieri-marks:

Dr. Donna Lettieri-marks is a psychologist specializing in Clinical Psychology. She is a mental health professional with highly specialized training in the diagnosis and psychological treatment of mental, behavioral and emotional illnesses, including obsessive-compulsive disorder (OCD). Her main focus is on diagnosing and treating mental, emotional, and behavioral disorders. Some of the common disorders that she can treat are learning disabilities, substance abuse, depression, anxiety, and eating disorders.

Dr. Donna Lettieri-marks has approximately 31 years of experience in Clinical Psychology.

Yes, Dr. Donna Lettieri-marks accepts Medicare assignment, meaning the provider participates in Medicare and accepts Medicare-approved amounts for eligible services.

Yes, Dr. Donna Lettieri-marks is currently accepting new patients. To schedule an appointment, contact the office directly and schedule an appointment.
*Availability may change. Please contact the office directly to ask about appointments.

Dr. Donna Lettieri-marks practices at 55 S Main St, Suite 371, Naperville, Illinois, 60540-5372.

To schedule an appointment with Dr. Donna Lettieri-marks, please contact the office at 630-904-6610.

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**Data of this site is collected from Medicare & Medicaid Services (CMS) and NPPES. Last updated on 14 September, 2026.