William Duke, M.A.
NPI 1851734909 · Mental Health Counselor · Naperville, IL
William Duke, M.A. is a Mental Health Counselor provider in Naperville, IL (NPI 1851734909).
Provider details
- NPI number
- 1851734909
- Entity type
- Individual
- Primary specialty
- Mental Health CounselorBehavioral Health & Social Service Providers
- Credential
- M.A.
- Sex
- Male
- Sole proprietor
- No
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
13 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
- 2013-04-08
- Last updated
- 2013-04-08
Frequently asked questions
- What is William Duke's NPI number?
- William Duke's National Provider Identifier (NPI) is 1851734909, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Duke's specialty?
- William Duke is listed in the NPPES registry with a primary specialty of Mental Health Counselor (Behavioral Health & Social Service Providers).
- Where is William Duke located?
- William Duke's practice location on file with NPPES is 1819 Bay Scott Cir, Naperville, IL 60540-1129.
- What is William Duke's phone number?
- The practice phone number listed in the NPPES registry for William Duke is (630) 357-2456.
- Is William Duke's NPI active?
- Yes — William Duke's NPI (1851734909) is active in the NPPES registry as of the last update on 2013-04-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.