William Decker
NPI 1689829707 · Occupational Therapy Assistant · Madison, WI
William Decker is a Occupational Therapy Assistant provider in Madison, WI (NPI 1689829707).
Provider details
- NPI number
- 1689829707
- Entity type
- Individual
- Primary specialty
- Occupational Therapy AssistantRespiratory, Developmental, Rehabilitative and Restorative Service Providers
- Sex
- Male
- Sole proprietor
- Yes
- License
- 1442-27 (WI)
Specialties & taxonomies
Respiratory, Developmental, Rehabilitative and Restorative Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
17 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
- 2008-11-18
- Last updated
- 2008-11-18
Frequently asked questions
- What is William Decker's NPI number?
- William Decker's National Provider Identifier (NPI) is 1689829707, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Decker's specialty?
- William Decker is listed in the NPPES registry with a primary specialty of Occupational Therapy Assistant (Respiratory, Developmental, Rehabilitative and Restorative Service Providers).
- Where is William Decker located?
- William Decker's practice location on file with NPPES is 600 Highland Ave, Madison, WI 53792-0001.
- What is William Decker's phone number?
- The practice phone number listed in the NPPES registry for William Decker is (608) 662-0817.
- Is William Decker's NPI active?
- Yes — William Decker's NPI (1689829707) is active in the NPPES registry as of the last update on 2008-11-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.