William Niehaus
NPI 1144328774 · Clinical Social Worker · Greenwood, IN
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Niehaus is a Clinical Social Worker provider in Greenwood, IN (NPI 1144328774).
Provider details
- NPI number
- 1144328774
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Sex
- Male
- Sole proprietor
- No
- License
- 34008980A (IN)
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
- 2006-09-20
- Last updated
- 2025-01-15
- Certified
- 2025-01-15
Frequently asked questions
- What is William Niehaus's NPI number?
- William Niehaus's National Provider Identifier (NPI) is 1144328774, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Niehaus's specialty?
- William Niehaus is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is William Niehaus located?
- William Niehaus's practice location on file with NPPES is 500 Polk St Ste 6g, Greenwood, IN 46143-1647.
- What is William Niehaus's phone number?
- The practice phone number listed in the NPPES registry for William Niehaus is (317) 300-4214.
- Does William Niehaus accept Medicare?
- William Niehaus is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Niehaus's NPI active?
- Yes — William Niehaus's NPI (1144328774) is active in the NPPES registry as of the last update on 2025-01-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.