Jennifer Duff, PSY.D.
NPI 1649492315 · Clinical Psychologist · Naperville, IL
Jennifer Duff, PSY.D. is a Clinical Psychologist provider in Naperville, IL (NPI 1649492315).
Provider details
- NPI number
- 1649492315
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PSY.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- 071007188 (IL)
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
19 yrs in NPPES registry
- Profile completeness38% of score
100% 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
- 2007-05-03
- Last updated
- 2013-12-10
Frequently asked questions
- What is Jennifer Duff's NPI number?
- Jennifer Duff's National Provider Identifier (NPI) is 1649492315, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jennifer Duff's specialty?
- Jennifer Duff is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Jennifer Duff located?
- Jennifer Duff's practice location on file with NPPES is 1020 E Ogden Ave, Naperville, IL 60563-8609.
- What is Jennifer Duff's phone number?
- The practice phone number listed in the NPPES registry for Jennifer Duff is (630) 420-9707.
- Is Jennifer Duff's NPI active?
- Yes — Jennifer Duff's NPI (1649492315) is active in the NPPES registry as of the last update on 2013-12-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.