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Douglas Demerchant, PSY.D.
NPI 1831564228 · Clinical Psychologist · Wheaton, IL
Douglas Demerchant, PSY.D. is a Clinical Psychologist provider in Wheaton, IL (NPI 1831564228).
Provider details
- NPI number
- 1831564228
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PSY.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 071003669 (IL)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Established profile(73/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
10 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
620 W Roosevelt Rd Ste D1
Wheaton, IL 60187-2306
Phone: (630) 462-1999
Fax: (630) 462-0069
Street-level locationGet directions
Mailing address
620 W Roosevelt Rd Ste D1
Wheaton, IL 60187-2306
Registry dates
- Enumerated
- 2015-12-10
- Last updated
- 2015-12-10
Frequently asked questions
- What is Douglas Demerchant's NPI number?
- Douglas Demerchant's National Provider Identifier (NPI) is 1831564228, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Douglas Demerchant's specialty?
- Douglas Demerchant is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Douglas Demerchant located?
- Douglas Demerchant's practice location on file with NPPES is 620 W Roosevelt Rd Ste D1, Wheaton, IL 60187-2306.
- What is Douglas Demerchant's phone number?
- The practice phone number listed in the NPPES registry for Douglas Demerchant is (630) 462-1999.
- Is Douglas Demerchant's NPI active?
- Yes — Douglas Demerchant's NPI (1831564228) is active in the NPPES registry as of the last update on 2015-12-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.