Stuart Waltonen, PHD
NPI 1821104357 · Clinical Neuropsychologist · Marshfield, WI
Stuart Waltonen, PHD is a Clinical Neuropsychologist provider in Marshfield, WI (NPI 1821104357).
Provider details
- NPI number
- 1821104357
- Entity type
- Individual
- Primary specialty
- Clinical NeuropsychologistBehavioral Health & Social Service Providers
- Credential
- PHD
- Sex
- Male
- Sole proprietor
- No
- License
- 1315 (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
- 2006-08-21
- Last updated
- 2025-09-11
Frequently asked questions
- What is Stuart Waltonen's NPI number?
- Stuart Waltonen's National Provider Identifier (NPI) is 1821104357, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stuart Waltonen's specialty?
- Stuart Waltonen is listed in the NPPES registry with a primary specialty of Clinical Neuropsychologist (Behavioral Health & Social Service Providers).
- Where is Stuart Waltonen located?
- Stuart Waltonen's practice location on file with NPPES is 1000 N Oak Ave, Marshfield, WI 54449.
- What is Stuart Waltonen's phone number?
- The practice phone number listed in the NPPES registry for Stuart Waltonen is (715) 387-5366.
- Is Stuart Waltonen's NPI active?
- Yes — Stuart Waltonen's NPI (1821104357) 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.