Donna Lettieri-Marks, PSY.D.
NPI 1346233665 · Clinical Psychologist · Naperville, IL
Enrolled with Medicare as Practitioner - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Donna Lettieri-Marks, PSY.D. is a Clinical Psychologist provider in Naperville, IL (NPI 1346233665).
Provider details
- NPI number
- 1346233665
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PSY.D.
- Sex
- Female
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
83% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-08-23
- Last updated
- 2007-07-08
Frequently asked questions
- What is Donna Lettieri-Marks's NPI number?
- Donna Lettieri-Marks's National Provider Identifier (NPI) is 1346233665, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Donna Lettieri-Marks's specialty?
- Donna Lettieri-Marks is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Donna Lettieri-Marks located?
- Donna Lettieri-Marks's practice location on file with NPPES is 55 S Main St, Naperville, IL 60540-5372.
- What is Donna Lettieri-Marks's phone number?
- The practice phone number listed in the NPPES registry for Donna Lettieri-Marks is (630) 904-6610.
- Does Donna Lettieri-Marks accept Medicare?
- Donna Lettieri-Marks is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Donna Lettieri-Marks's NPI active?
- Yes — Donna Lettieri-Marks's NPI (1346233665) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.