William Greer, MS
NPI 1548478365 · Clinical Social Worker · Madison, WI
William Greer, MS is a Clinical Social Worker provider in Madison, WI (NPI 1548478365).
Provider details
- NPI number
- 1548478365
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- MS
- Sex
- Male
- Sole proprietor
- No
- License
- 663 (WI)
Specialties & taxonomies
Behavioral Health & Social Service Providers
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
- 2007-05-18
- Last updated
- 2025-09-11
Frequently asked questions
- What is William Greer's NPI number?
- William Greer's National Provider Identifier (NPI) is 1548478365, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Greer's specialty?
- William Greer is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is William Greer located?
- William Greer's practice location on file with NPPES is 625 W Washington Ave, Madison, WI 53703-2637.
- What is William Greer's phone number?
- The practice phone number listed in the NPPES registry for William Greer is (608) 280-2700.
- Is William Greer's NPI active?
- Yes — William Greer's NPI (1548478365) is active in the NPPES registry as of the last update on 2025-09-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.